Aluminium alloy 6063 6063

Al-Mg-Si alloy

Also known as UNS A96063, EN 3.3206, EN name EN AW-6063, EN name AlMg0.7Si, SAE J454, AA 6063 · 13 more

6063 is an aluminium alloy with magnesium and silicon as its main additions, and Alloys International calls it the architectural extrusion alloy.

10 sources · Updated 2026-10-24 · CC BY 4.0

Evidence level

2 of 5

Lab-measured

Strength, T6

215 MPa minimum tensile; about 35 ksi typical

Strength, T4

150 MPa minimum tensile

Recipe, share of the weight

Al balanceAluminium
Mg 0.45 to 0.9%Magnesium
Si 0.2 to 0.6%Silicon
Fe 0 to 0.35%Iron
Cu 0 to 0.1%Copper
Mn 0 to 0.1%Manganese
Zn 0 to 0.1%Zinc
Ti 0 to 0.1%Titanium
Cr maximum, printed as 0.1 maxChromium

Best for

Architectural extrusions such as window and door frames, rails and trim that need a smooth anodised finish (Alloys International; AZoM).

Weakest at

Strength: Alloys International says 6061 is the higher-strength choice for structural parts, and no space-environment, cryogenic or galvanic data were found for 6063.

Risk at a glance

People No data. No hazard data recorded
If it fails No data. No failure risks recorded
Corrosion Low. AZoM describes 6063 as having high corrosion resistance

Quick facts: 6063

Key properties of 6063
Property	Value	Basis
Density	2.7 g/cm³	1 sourced value
Yield strength	90 to 214 MPa	8 sourced values across conditions
Tensile strength	150 to 241 MPa	8 sourced values across conditions
Young's modulus	69.5 GPa	1 sourced value
Thermal conductivity	200 W/(m·K)	1 sourced value
Thermal expansion (CTE)	23.5 ppm/K	1 sourced value
Melting point	600 °C	1 sourced value
Electrical resistivity	3.5e-7 Ω·m	1 sourced value

What is the density of Aluminium alloy 6063?

Aluminium alloy 6063 has a density of 2.7 g/cm³. The source and test conditions are listed in the properties table on this page.

What is the thermal conductivity of Aluminium alloy 6063?

Aluminium alloy 6063 has a thermal conductivity of 200 W/(m·K). The source and test conditions are listed in the properties table on this page.

What is the coefficient of thermal expansion of Aluminium alloy 6063?

Aluminium alloy 6063 has a coefficient of thermal expansion of 23.5 ppm/K. The source and test conditions are listed in the properties table on this page.

What is the melting point of Aluminium alloy 6063?

Aluminium alloy 6063 has a melting point of 600 °C. The source and test conditions are listed in the properties table on this page.

What is the yield strength of Aluminium alloy 6063?

Aluminium alloy 6063 has a yield strength of 90 to 214 MPa. The range covers 8 sourced values across the tempers, forms and test conditions the sources report; room-temperature values are used where a source states a temperature.

What are the other names and codes for Aluminium alloy 6063?

Aluminium alloy 6063 is also written as UNS A96063, EN 3.3206, EN name EN AW-6063, EN name AlMg0.7Si, SAE J454, AA 6063. Each code is printed in the source listed beside it in the designations table.

What is Aluminium alloy 6063 used for?

Uses recorded in the sources include Window, door and curtain wall framing; Architectural trim, railing and balustrading; Heat sinks.

Why it exists

6063 is an aluminium alloy with magnesium (0.45 to 0.9 wt%) and silicon (0.2 to 0.6 wt%) as its main additions (AZoM, Table 1). Alloys International calls it the architectural extrusion alloy. Compared with 6061 it has less silicon and magnesium, so it extrudes into thinner walls and more intricate shapes, and it gives the smooth, uniform surface that anodising needs. Its strength is moderate, which is rarely the deciding factor in window frames, rails, trim, heat sinks and enclosures.

Where it's used

Window, door and curtain wall framing

Alloys International lists window, door and curtain wall framing among its typical applications, and AZoM lists window frames and doors.

Architectural trim, railing and balustrading

AZoM says balustrading rails and posts are normally T6 and formed elbows and bends are T4. T4 is also used for hydroformed chassis tube.

Heat sinks

Alloys International lists heat sinks and enclosures, where strength is rarely the deciding factor.

Recipe

Al-Mg-Si alloy; composition limits in wt%: Al balance, Mg 0.45 to 0.9, Si 0.2 to 0.6, Fe 0 to 0.35, Cu 0 to 0.1, Mn 0 to 0.1, Zn 0 to 0.1, Ti 0 to 0.1, Cr max 0.1

Al-Mg-Si alloy. Composition limits in wt% (AZoM, Table 1): magnesium 0.45 to 0.9, silicon 0.2 to 0.6, iron up to 0.35, copper, manganese, zinc and titanium up to 0.1 each, chromium up to 0.1, and aluminium the balance. The Alloys International page gives the same magnesium and silicon limits. AZoM says solution treatment with natural ageing gives T4, and solution treatment with artificial ageing gives T6.

What 6063 is made of
Ingredient	Share of the weight	What it does
Aluminium Al	balance	Matrix of the alloy; the balance of the composition (AZoM, Table 1)
Magnesium Mg	0.45 to 0.9%	Main alloying addition, with silicon (AZoM, Table 1; Alloys International nominal chemistry)
Silicon Si	0.2 to 0.6%	Main alloying addition, with magnesium (AZoM, Table 1; Alloys International nominal chemistry)
Iron Fe	0 to 0.35%	Limit only, maximum printed in Table 1
Copper Cu	0 to 0.1%	Limit only, maximum printed in Table 1
Manganese Mn	0 to 0.1%	Limit only, maximum printed in Table 1
Zinc Zn	0 to 0.1%	Limit only, maximum printed in Table 1
Titanium Ti	0 to 0.1%	Limit only, maximum printed in Table 1
Chromium Cr	maximum, printed as 0.1 max	Limit only, maximum printed in Table 1

Weight shares are as printed in the sources.

What it can do

Strength, T6

215 MPa minimum tensile; about 35 ksi typical

Minimum tensile strength of T6 rod and bar up to 150 mm is 215 MPa, with a minimum proof stress of 170 MPa (BS EN 755-2 values printed by AZoM). Alloys International's typical T6 figures are about 35 ksi tensile and 31 ksi yield.

Strength, T4

150 MPa minimum tensile

T4 extruded rod and bar up to 150 mm has a minimum tensile strength of 150 MPa and a minimum proof stress of 90 MPa (AZoM).

Ductility

Minimum elongation A50 mm is 8% for T6 rod and bar up to 150 mm and 10% for T4 extruded rod and bar (AZoM).

Weight

Density is 2700 kg/m3 (AZoM, Table 4).

Stiffness

Modulus of elasticity is 69.5 GPa (AZoM, Table 4).

Heat conduction

Thermal conductivity is 200 W/m.K (AZoM, Table 4).

Thermal expansion

The linear thermal expansion coefficient is 23.5 x 10^-6 /K (AZoM, Table 4).

Anodising

Excellent (Alloys International)

Alloys International calls the anodised finish excellent, and AZoM says 6063 can be easily anodised. No anodic film thickness or sealing data was found.

Welding

Excellent (gas, arc, resistance)

AZoM rates gas, arc and resistance welding as excellent, brazing as excellent and solderability as good. Alloys International says 5xxx and 6xxx alloys weld readily with 4043 or 5356 filler.

Machining

AZoM rates machinability and cold workability as average.

How it compares

The sources give no strength-per-mass figures for 6063 against other alloys, so this profile does not rank it. Alloys International says 6061 is the higher-strength choice for structural parts. The USGS lists composites, magnesium, steel and titanium as substitutes for aluminium in ground transport, and composites, steel, vinyl and wood in construction.

The same measurements for each material, so you can compare them. Each row names the key condition under the value; the full conditions and methods are in the numbered notes under Technical details. Other materials are shown beside it; each was measured under its own conditions, so open its page before comparing closely. Compare every grade in the family.

Benchmarks
Measurement	6063	6061	7075-T6	2024	5052	5XXX	2195 (Al-Cu-Li)	Al	1050	2011	2014	2017	2017A	2219	2319	2618A	3003	3103	4047	5019	5056	5083	AlMg2	AlMg3	6013	6082	6101	AA7050	AA8011	Au-Al IMCs	Al master alloys
Thermal behavior and safety
Melting point	600 °C³¹	no data	532 °C	no data	607.2 to 649 °C	no data	1020 degF	660 °C	645 to 657 °C	540 °C	535 °C	510 °C	510 °C	543 °C	543 to 643 °C	549 °C	655 °C	655 °C	1068 to 1080 °F	575 to 630 °C	565 to 640 °C	570 °C	605 to 650 °C	590 to 645 °C	579 °C	575 °C	1090 °F	490 °C	640 to 655 °C	no data	880 °C
Thermal conductivity	200 W/(m·K)³⁴	167 W/(m·K)	130 W/m·K	121 W/m-K	138 W/m-K	138 W/(m·K)	no data	220 W/(m·K)	229 W/m.K	140 W/m.K	138 W/(m·K)	140 W/m.K	140 W/m.K	130 W.m/m2.°C	no data	147 W/m.K	190 W/m.K	160 W/m.K	no data	110 to 140 W/(m·K)	109 to 117 W/(m·K)	121 W/(m·K)	138 W/(m·K)	140 to 160 W/(m·K)	164 W/(m·K)	180 W/(m·K)	no data	154 W/(m·K)	210 to 220 W/(m·K)	no data	no data
Physical and electrical
Density	2700 kg/m3³⁰	2.7 g/cm³	2.8 Mg/m3	2.78 g/cc	2.68 g/cc	2.68 g/cm³	0.096 lb/in3	2.7 g/cm³	2.71 g/cm³	2.82 g/cm³	2.82 g/cm³	2.79 g/cm³	2.79 g/cm³	2.84 g/cm³	2.84 g/cm³	2.76 g/cm³	2.73 g/cm³	2.73 g/cm³	2.65 g/cm³	2.64 g/cm³	2.64 g/cm³	2.65 g/cm³	2.69 g/cm³	2.67 g/cm³	2.71 g/cm³	2.7 g/cm³	0.097 lb/cu.in	2.83 g/cm³	2.71 g/cm³	no data	no data
Electrical resistivity	0.35 µΩ·m³³	4 µΩ·cm	5.2 µΩ·cm	5.82 µΩ·cm	no data	5.8 µΩ·cm	no data	2.646 µΩ·cm	no data	no data	0.045 µΩ·m	no data	no data	5.7 μΩ.cm²/cm	no data	no data	no data	no data	no data	0.0526 to 0.0667 Ω·mm²/m	5.88×10^-8 to 6.25×10^-8 Ω·m	0.058 µΩ·m	50 nΩ·m	no data	no data	0.038 µΩ·m	no data	no data	2.86×10^-8 to 2.94×10^-8 Ω·m	no data	no data
Other measurements
Tensile strength, typical, T5	27 ksi¹	310 MPa	572 MPa	469 MPa	28 ksi	228 MPa	80 ksi	88 MPa	105 to 145 MPa	300 MPa	> 460 MPa	427 MPa	427 MPa	> 62 ksi	160 MPa	420 MPa	110 MPa	> 140 MPa	124 MPa	270 to 350 MPa	300 MPa	275 to 350 MPa	190 to 230 MPa	190 to 260 MPa	410 MPa	> 300 MPa	32000 psi	> 483 MPa	180 to 195 MPa	no data	no data
Yield strength, typical, T5	21 ksi²	276 MPa	503 MPa	324 MPa	13 ksi	193 MPa	74 ksi	29 MPa	> 85 MPa	140 MPa	> 400 MPa	276 MPa	276 MPa	> 50 ksi	70 MPa	350 MPa	50 MPa	> 110 MPa	55 MPa	no data	no data	> 125 MPa	> 120 MPa	> 80 MPa	350 MPa	> 255 MPa	28000 psi	> 414 MPa	no data	no data	no data
Elongation, typical, T5	8 %³	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Tensile strength, typical, T6	35 ksi⁴	310 MPa	572 MPa	469 MPa	28 ksi	228 MPa	80 ksi	88 MPa	105 to 145 MPa	300 MPa	> 460 MPa	427 MPa	427 MPa	> 62 ksi	160 MPa	420 MPa	110 MPa	> 140 MPa	124 MPa	270 to 350 MPa	300 MPa	275 to 350 MPa	190 to 230 MPa	190 to 260 MPa	410 MPa	> 300 MPa	32000 psi	> 483 MPa	180 to 195 MPa	no data	no data
Yield strength, typical, T6	31 ksi⁵	276 MPa	503 MPa	324 MPa	13 ksi	193 MPa	74 ksi	29 MPa	> 85 MPa	140 MPa	> 400 MPa	276 MPa	276 MPa	> 50 ksi	70 MPa	350 MPa	50 MPa	> 110 MPa	55 MPa	no data	no data	> 125 MPa	> 120 MPa	> 80 MPa	350 MPa	> 255 MPa	28000 psi	> 414 MPa	no data	no data	no data
Elongation, typical, T6	10 %⁶	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Proof stress, minimum, T4 extruded rod and bar	> 90 MPa⁷	276 MPa	503 MPa	324 MPa	13 ksi	193 MPa	74 ksi	29 MPa	> 85 MPa	140 MPa	> 400 MPa	276 MPa	276 MPa	> 50 ksi	70 MPa	350 MPa	50 MPa	> 110 MPa	55 MPa	no data	no data	> 125 MPa	> 120 MPa	> 80 MPa	350 MPa	> 255 MPa	28000 psi	> 414 MPa	no data	no data	no data
Tensile strength, minimum, T4 extruded rod and bar	> 150 MPa⁸	310 MPa	572 MPa	469 MPa	28 ksi	228 MPa	80 ksi	88 MPa	105 to 145 MPa	300 MPa	> 460 MPa	427 MPa	427 MPa	> 62 ksi	160 MPa	420 MPa	110 MPa	> 140 MPa	124 MPa	270 to 350 MPa	300 MPa	275 to 350 MPa	190 to 230 MPa	190 to 260 MPa	410 MPa	> 300 MPa	32000 psi	> 483 MPa	180 to 195 MPa	no data	no data
Elongation A50 mm, minimum, T4 extruded rod and bar	> 10 %⁹	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Elongation A, minimum, T4 extruded rod and bar	> 12 %¹⁰	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Proof stress, minimum, T6 rod and bar up to 150 mm	> 170 MPa¹¹	276 MPa	503 MPa	324 MPa	13 ksi	193 MPa	74 ksi	29 MPa	> 85 MPa	140 MPa	> 400 MPa	276 MPa	276 MPa	> 50 ksi	70 MPa	350 MPa	50 MPa	> 110 MPa	55 MPa	no data	no data	> 125 MPa	> 120 MPa	> 80 MPa	350 MPa	> 255 MPa	28000 psi	> 414 MPa	no data	no data	no data
Tensile strength, minimum, T6 rod and bar up to 150 mm	> 215 MPa¹²	310 MPa	572 MPa	469 MPa	28 ksi	228 MPa	80 ksi	88 MPa	105 to 145 MPa	300 MPa	> 460 MPa	427 MPa	427 MPa	> 62 ksi	160 MPa	420 MPa	110 MPa	> 140 MPa	124 MPa	270 to 350 MPa	300 MPa	275 to 350 MPa	190 to 230 MPa	190 to 260 MPa	410 MPa	> 300 MPa	32000 psi	> 483 MPa	180 to 195 MPa	no data	no data
Elongation A50 mm, minimum, T6 rod and bar up to 150 mm	> 8 %¹³	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Elongation A, minimum, T6 rod and bar up to 150 mm	> 10 %¹⁴	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Proof stress, minimum, T6 rod and bar 150 to 200 mm	> 160 MPa¹⁵	276 MPa	503 MPa	324 MPa	13 ksi	193 MPa	74 ksi	29 MPa	> 85 MPa	140 MPa	> 400 MPa	276 MPa	276 MPa	> 50 ksi	70 MPa	350 MPa	50 MPa	> 110 MPa	55 MPa	no data	no data	> 125 MPa	> 120 MPa	> 80 MPa	350 MPa	> 255 MPa	28000 psi	> 414 MPa	no data	no data	no data
Tensile strength, minimum, T6 rod and bar 150 to 200 mm	> 195 MPa¹⁶	310 MPa	572 MPa	469 MPa	28 ksi	228 MPa	80 ksi	88 MPa	105 to 145 MPa	300 MPa	> 460 MPa	427 MPa	427 MPa	> 62 ksi	160 MPa	420 MPa	110 MPa	> 140 MPa	124 MPa	270 to 350 MPa	300 MPa	275 to 350 MPa	190 to 230 MPa	190 to 260 MPa	410 MPa	> 300 MPa	32000 psi	> 483 MPa	180 to 195 MPa	no data	no data
Elongation A, minimum, T6 rod and bar 150 to 200 mm	> 10 %¹⁷	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Proof stress, minimum, T6 tube up to 25 mm wall	> 170 MPa¹⁸	276 MPa	503 MPa	324 MPa	13 ksi	193 MPa	74 ksi	29 MPa	> 85 MPa	140 MPa	> 400 MPa	276 MPa	276 MPa	> 50 ksi	70 MPa	350 MPa	50 MPa	> 110 MPa	55 MPa	no data	no data	> 125 MPa	> 120 MPa	> 80 MPa	350 MPa	> 255 MPa	28000 psi	> 414 MPa	no data	no data	no data
Tensile strength, minimum, T6 tube up to 25 mm wall	> 215 MPa¹⁹	310 MPa	572 MPa	469 MPa	28 ksi	228 MPa	80 ksi	88 MPa	105 to 145 MPa	300 MPa	> 460 MPa	427 MPa	427 MPa	> 62 ksi	160 MPa	420 MPa	110 MPa	> 140 MPa	124 MPa	270 to 350 MPa	300 MPa	275 to 350 MPa	190 to 230 MPa	190 to 260 MPa	410 MPa	> 300 MPa	32000 psi	> 483 MPa	180 to 195 MPa	no data	no data
Elongation A50 mm, minimum, T6 tube up to 25 mm wall	> 8 %²⁰	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Elongation A, minimum, T6 tube up to 25 mm wall	> 10 %²¹	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Proof stress, minimum, T6 profiles up to 10 mm wall	> 170 MPa²²	276 MPa	503 MPa	324 MPa	13 ksi	193 MPa	74 ksi	29 MPa	> 85 MPa	140 MPa	> 400 MPa	276 MPa	276 MPa	> 50 ksi	70 MPa	350 MPa	50 MPa	> 110 MPa	55 MPa	no data	no data	> 125 MPa	> 120 MPa	> 80 MPa	350 MPa	> 255 MPa	28000 psi	> 414 MPa	no data	no data	no data
Tensile strength, minimum, T6 profiles up to 10 mm wall	> 215 MPa²³	310 MPa	572 MPa	469 MPa	28 ksi	228 MPa	80 ksi	88 MPa	105 to 145 MPa	300 MPa	> 460 MPa	427 MPa	427 MPa	> 62 ksi	160 MPa	420 MPa	110 MPa	> 140 MPa	124 MPa	270 to 350 MPa	300 MPa	275 to 350 MPa	190 to 230 MPa	190 to 260 MPa	410 MPa	> 300 MPa	32000 psi	> 483 MPa	180 to 195 MPa	no data	no data
Elongation A50 mm, minimum, T6 profiles up to 10 mm wall	> 6 %²⁴	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Elongation A, minimum, T6 profiles up to 10 mm wall	> 8 %²⁵	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Proof stress, minimum, T6 profiles 10 to 25 mm wall	> 160 MPa²⁶	276 MPa	503 MPa	324 MPa	13 ksi	193 MPa	74 ksi	29 MPa	> 85 MPa	140 MPa	> 400 MPa	276 MPa	276 MPa	> 50 ksi	70 MPa	350 MPa	50 MPa	> 110 MPa	55 MPa	no data	no data	> 125 MPa	> 120 MPa	> 80 MPa	350 MPa	> 255 MPa	28000 psi	> 414 MPa	no data	no data	no data
Tensile strength, minimum, T6 profiles 10 to 25 mm wall	> 195 MPa²⁷	310 MPa	572 MPa	469 MPa	28 ksi	228 MPa	80 ksi	88 MPa	105 to 145 MPa	300 MPa	> 460 MPa	427 MPa	427 MPa	> 62 ksi	160 MPa	420 MPa	110 MPa	> 140 MPa	124 MPa	270 to 350 MPa	300 MPa	275 to 350 MPa	190 to 230 MPa	190 to 260 MPa	410 MPa	> 300 MPa	32000 psi	> 483 MPa	180 to 195 MPa	no data	no data
Elongation A50 mm, minimum, T6 profiles 10 to 25 mm wall	> 6 %²⁸	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Elongation A, minimum, T6 profiles 10 to 25 mm wall	> 8 %²⁹	17 %	11 %	19 %	25 %	12 %	8 %	50 to 65 %	4 to 8 %	16 %	> 6 %	18 %	18 %	> 6 %	12 %	> 5 %	25 %	> 8 %	12 %	> 2 %	20 %	> 12 %	4 to 12 %	> 12 %	4 %	> 9 %	> 8 %	> 7 %	> 1 %	no data	no data
Modulus of elasticity	69.5 GPa³²	68.9 GPa	71 GPa	73.1 GPa	70.3 GPa	70.3 GPa	11 MSI	69 GPa	69000 MPa	70 GPa	71 GPa	72 GPa	72 GPa	73.8 x10^3 N/mm2	no data	71 GPa	69.5 GPa	69.5 GPa	no data	70 GPa	71 GPa	72 GPa	70 GPa	70 GPa	71 GPa	70 GPa	no data	71.5 GPa	70 GPa	no data	no data
Thermal expansion coefficient	23.5 ppm/K³⁵	23.6 ppm/K	23.4 µm/m·K	23.2 ppm/K	24.8 µm/m-°C	24 ppm/K	no data	22.5 ppm/K	23.5 x10-6/K	21.4 µm/m.°C	23 ppm/K	22.9 µm/(m·°C)	22.9 µm/m.°C	22.5 x10^-6 m/m.°C	no data	21.6 µm/m°C	23.1 ppm/K	23.1 x10-6/K	no data	no data	2.41×10^-5 1/K	25 ppm/K	23.8 µm/m/°C	23.9 ppm/K	21.7 µm/m°C	23.1 ppm/K	no data	23.5 ppm/K	2.35×10^-5 1/K	no data	no data

Why choose it, and why not

Good for

Architectural extrusions, such as window and door frames, rails and trim, that need a smooth anodised finish (Alloys International; AZoM).
Heat sinks, where a thermal conductivity of 200 W/m.K spreads heat (AZoM, Table 4).
Welded assemblies, since gas, arc and resistance welding are all rated excellent (AZoM).

Watch out for

Strength is moderate. Alloys International says 6061 is the higher-strength choice for structural parts.
The Alloys International strengths are approximate typical values in ksi and are not for design. The AZoM strengths are BS EN 755-2 minima.
T1 and T83 values were not found, so the file has no rows for them.
No galvanic, alkali or acid data, no space-environment data and no cryogenic values were found for 6063.

6063 is the architectural extrusion alloy: moderate strength, excellent weldability, a finish that anodises well, and good corrosion resistance in general use. The sources give no T1 or T83 values and no space-environment data.

Technical details

For scientists and researchers. Everything above comes from the record below: every number with its method, its conditions and its source.

Other names and standards

The same grade under other systems, as datasheets and standards print them. Each code was checked against the page it comes from.

Other names and standards
System	Codes
UNS	A96063
EN	3.3206
EN name	EN AW-6063, AlMg0.7Si (chemical-symbol form of the EN name)
SAE	J454
AA	6063
ASTM	B210, B221, B241 (pipe, seamless), B345 (pipe, seamless), B361, B429, B483, B491
MIL	G-18014, G-18015, P-25995, W-85
QQ	QQA-200/9

Notes

The method, full conditions and any caveat for the numbered rows above.

Notes for the numbered rows
#	Measurement	Method	Conditions	Caveat
1	Tensile strength, typical, T5	Typical value printed in a supplier table (Alloys International, typical mechanical properties)	temper T5product form not stated (the page says values vary with section size, product form and processing)basis typical value printed with a tilde (approximate); the page says for reference only, not for design	—
2	Yield strength, typical, T5	Typical value printed in a supplier table (Alloys International, typical mechanical properties)	temper T5product form not stated (the page says values vary with section size, product form and processing)basis typical value printed with a tilde (approximate); the page says for reference only, not for design	—
3	Elongation, typical, T5	Typical value printed in a supplier table (Alloys International, typical mechanical properties)	temper T5product form not stated (the page says values vary with section size, product form and processing)basis typical value printed with a tilde (approximate); the page says for reference only, not for design	—
4	Tensile strength, typical, T6	Typical value printed in a supplier table (Alloys International, typical mechanical properties)	temper T6product form not stated (the page says values vary with section size, product form and processing)basis typical value printed with a tilde (approximate); the page says for reference only, not for design	—
5	Yield strength, typical, T6	Typical value printed in a supplier table (Alloys International, typical mechanical properties)	temper T6product form not stated (the page says values vary with section size, product form and processing)basis typical value printed with a tilde (approximate); the page says for reference only, not for design	—
6	Elongation, typical, T6	Typical value printed in a supplier table (Alloys International, typical mechanical properties)	temper T6product form not stated (the page says values vary with section size, product form and processing)basis typical value printed with a tilde (approximate); the page says for reference only, not for design	—
7	Proof stress, minimum, T4 extruded rod and bar	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T4product form extruded rod and barsize up to 150 mm diameter or across flats (A/F)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min; the table prints the name Proof Stress	—
8	Tensile strength, minimum, T4 extruded rod and bar	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T4product form extruded rod and barsize up to 150 mm diameter or across flats (A/F)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
9	Elongation A50 mm, minimum, T4 extruded rod and bar	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T4product form extruded rod and barsize up to 150 mm diameter or across flats (A/F)gauge A50 mmstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
10	Elongation A, minimum, T4 extruded rod and bar	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T4product form extruded rod and barsize up to 150 mm diameter or across flats (A/F)gauge A (printed as Elongation A; gauge length not printed)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
11	Proof stress, minimum, T6 rod and bar up to 150 mm	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form rod and barsize up to 150 mm diameter and across flats (A/F)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min; the table prints the name Proof Stress	—
12	Tensile strength, minimum, T6 rod and bar up to 150 mm	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form rod and barsize up to 150 mm diameter and across flats (A/F)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
13	Elongation A50 mm, minimum, T6 rod and bar up to 150 mm	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form rod and barsize up to 150 mm diameter and across flats (A/F)gauge A50 mmstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
14	Elongation A, minimum, T6 rod and bar up to 150 mm	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form rod and barsize up to 150 mm diameter and across flats (A/F)gauge A (printed as Elongation A; gauge length not printed)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
15	Proof stress, minimum, T6 rod and bar 150 to 200 mm	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form rod and barsize 150 mm to 200 mm diameter and across flats (A/F)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min; the table prints the name Proof Stress	—
16	Tensile strength, minimum, T6 rod and bar 150 to 200 mm	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form rod and barsize 150 mm to 200 mm diameter and across flats (A/F)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
17	Elongation A, minimum, T6 rod and bar 150 to 200 mm	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form rod and barsize 150 mm to 200 mm diameter and across flats (A/F)gauge A (printed as Elongation A; gauge length not printed)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
18	Proof stress, minimum, T6 tube up to 25 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form tubesize up to 25 mm wall thicknessstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min; the table prints the name Proof Stress	—
19	Tensile strength, minimum, T6 tube up to 25 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form tubesize up to 25 mm wall thicknessstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
20	Elongation A50 mm, minimum, T6 tube up to 25 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form tubesize up to 25 mm wall thicknessgauge A50 mmstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
21	Elongation A, minimum, T6 tube up to 25 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form tubesize up to 25 mm wall thicknessgauge A (printed as Elongation A; gauge length not printed)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
22	Proof stress, minimum, T6 profiles up to 10 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form profilessize up to 10 mm wall thicknessstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min; the table prints the name Proof Stress	—
23	Tensile strength, minimum, T6 profiles up to 10 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form profilessize up to 10 mm wall thicknessstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
24	Elongation A50 mm, minimum, T6 profiles up to 10 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form profilessize up to 10 mm wall thicknessgauge A50 mmstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
25	Elongation A, minimum, T6 profiles up to 10 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form profilessize up to 10 mm wall thicknessgauge A (printed as Elongation A; gauge length not printed)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
26	Proof stress, minimum, T6 profiles 10 to 25 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form profilessize 10 mm to 25 mm wall thicknessstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min; the table prints the name Proof Stress	—
27	Tensile strength, minimum, T6 profiles 10 to 25 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form profilessize 10 mm to 25 mm wall thicknessstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
28	Elongation A50 mm, minimum, T6 profiles 10 to 25 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form profilessize 10 mm to 25 mm wall thicknessgauge A50 mmstandard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
29	Elongation A, minimum, T6 profiles 10 to 25 mm wall	Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)	temper T6product form profilessize 10 mm to 25 mm wall thicknessgauge A (printed as Elongation A; gauge length not printed)standard BS EN 755-2 as printed by AZoMbasis minimum value printed as Min	—
30	Density	Value printed in a physical-properties table (AZoM article, sourced from Aalco)	temperature not statedbasis value printed in Table 4, physical properties	—
31	Melting point	Value printed in a physical-properties table (AZoM article, sourced from Aalco)	basis single value printed; no range given	—
32	Modulus of elasticity	Value printed in a physical-properties table (AZoM article, sourced from Aalco)	temperature not stated	—
33	Electrical resistivity	Value printed in a physical-properties table (AZoM article, sourced from Aalco); written in µΩ·m, the same unit as the printed x 10 -6 Ω.m, which is kept in conditions.unit_in_source	temperature not statedunit in source 0.35 x 10 -6 Ω.m	—
34	Thermal conductivity	Value printed in a physical-properties table (AZoM article, sourced from Aalco); the printed unit W/m.K is the same unit	temperature not statedunit in source W/m.K	—
35	Thermal expansion coefficient	Value printed in a physical-properties table (AZoM article, sourced from Aalco); x 10^-6 /K is the same as ppm/K, and the printed form is kept in conditions.unit_in_source	temperature not statedunit in source x 10 -6 /K	—

Corrosion and compatibility

What happens when it meets other materials and environments.

Corrosion and compatibility
Environment	Concern	What happens
General service (no environment named in the source)	low	AZoM describes 6063 as having high corrosion resistance¹
General service (no environment named in the source)	low	Alloys International lists good corrosion resistance among its reasons to specify 6063²

Corrosion details
#	Environment	Details	Test conditions
1	General service (no environment named in the source)	AZoM says 6063 has a good surface finish, high corrosion resistance, is readily suited to welding and can be easily anodised. The page names no environment, test or rate.	basis qualitative statement in the article introduction
2	General service (no environment named in the source)	Alloys International lists good corrosion resistance and weldability under Why engineers specify 6063. It gives no environment, test or rate.	basis qualitative statement on a supplier page

Risks and side effects

Hazards to people, what happens when a cell overheats, and how the material is handled and stored.

For people

No safety data sheet for 6063 was opened. Element-level PubChem GHS data for aluminium, magnesium and silicon is in the hazards list.

What the sources cover: The sources describe finish, corrosion, extrusion and welding behaviour, not health effects. Read the supplier's safety data sheet before cutting, grinding or welding.
Not covered: Hazard classification of 6063 as supplied, and of dust or fumes from machining or welding, was not found.

If it fails

Failure routes that the sources name. None of them is a field-incident record.

Movement during machining: Alloys International says thick plate can move when large volumes are removed, and recommends a stress-relieved temper to limit this.
Corrosion: AZoM and Alloys International both describe good to high corrosion resistance. Neither names an environment that attacks 6063.
Welding: The sources rate gas, arc and resistance welding as excellent (AZoM). No figure for strength loss near a weld was found in a source opened for this profile.

Handling and storage

Forming and machining: Form in the annealed or freshly solution treated condition where the temper allows, then age to final strength. Cut heat-treatable alloys in the T temper.
Welding filler: Use 5183 or 4043 filler generally, 4043 where maximum electrical conductivity is needed, and 5346 for strength and conductivity (AZoM).

Test details
The original wording and numbers from the sources, for readers who want them.

Failure risks

Failure risks
Failure	Trigger and consequence
Movement of thick plate when large volumes are machined off	Removing large volumes of material from thick plateThe part can move. Alloys International says stress-relieved tempers limit this movement.

Handling and storage

Heat-treatable alloys cut cleanest in the T temper. Thick plate benefits from a stress-relieved temper to limit movement when large volumes of material are removed.
Form in the annealed or freshly solution treated condition where the temper allows, then age to final strength. Bend radii follow the temper and thickness in the governing specification.
Suitable for all conventional welding methods. Welding wire is generally 5183 or 4043; 4043 where maximum electrical conductivity is needed; 5346 for strength and conductivity, with a larger weld to make up for lower conductivity.
The 5xxx and 6xxx alloys weld readily with 4043 or 5356 filler. This is a series-level statement on the Alloys International page.
T4 has good formability, and T6 is the most commonly available temper.

Mitigations

Order to the specification and condition the drawing requires, because properties vary with section size, product form and processing.

Supply and geography

How common the raw materials are and where they come from.

Aluminium (primary smelter production)

Top producers (2025): China 60.8%, India 5.7%, Russia 5.3%, Canada 4.5%, United Arab Emirates 3.6%
Recycling: USGS: in 2025 about 3.6 million tons of aluminum was recovered from purchased scrap in the United States, about 56% from new scrap and 44% from old scrap. Old-scrap recovery equalled about 28% of apparent consumption.
Substitutes: USGS: composites can substitute for aluminum in aircraft fuselages and wings.; USGS: composites, magnesium, steel and titanium can substitute for aluminum in ground transportation uses.; USGS: composites, steel, vinyl and wood can substitute for aluminum in construction.; USGS: copper can replace aluminum in electrical and heat-exchange applications.

Bauxite (aluminium ore)

USGS: bauxite resources are estimated to range from 55 billion to 75 billion tons, distributed in Africa (32%), Oceania (23%), South America and the Caribbean (21%), Asia (18%) and elsewhere (6%).

Top producers (2025): Guinea 34.1%, Australia 22%, China 19.8%, Brazil 7.5%, India 5.7%
Critical mineral lists: EU: listed
Recycling: USGS: none.
Substitutes: USGS: bauxite is the only raw material used in the production of alumina on a commercial scale in the United States. Clay resources are technically feasible sources of alumina but are not currently economically competitive with bauxite.

Alumina

Top producers (2025): China 62%, Australia 11.3%, Brazil 7.3%, India 5.5%, Russia 1.9%

Magnesium (primary production)

USGS: resources from which magnesium may be recovered range from large to virtually unlimited, and magnesium could be recovered from seawater along world coastlines.

Top producers (2025): China 86.4%, Russia 5.5%, Israel 1.8%, Brazil 1.8%, Turkey 1.4%, Kazakhstan 1.2%
Critical mineral lists: EU: listed
Recycling: USGS: in 2025 about 26,000 tons of secondary magnesium was recovered from old scrap and 82,000 tons from new scrap.
Substitutes: USGS: aluminum and zinc may substitute for magnesium in castings and wrought products. Magnesium's light weight is an advantage, but its high cost is a disadvantage relative to these substitutes.

Silicon (silicon metal)

USGS: world and domestic resources for making silicon metal and alloys are abundant and, in most producing countries, adequate to supply world requirements for many decades.

Top producers (2025): China 87%, Brazil 3.9%, Norway 2.8%, France 1.5%, Russia 0.8%
Critical mineral lists: US: listed, EU: listed
Recycling: USGS: insignificant.
Substitutes: USGS: aluminum, silicon carbide and silicomanganese can be substituted for ferrosilicon in some applications.; USGS: gallium arsenide and germanium are the principal substitutes for silicon in semiconductor and infrared applications.

Documents

Datasheets, safety data sheets, papers and standards you can open.

Documents
Document	Type	Year
Alloys International: 6063 grade page	datasheet
AZoM: Aluminium Alloys - Aluminium 6063/6063A Properties, Fabrication and Applications (sourced from Aalco)	datasheet	2020
USGS Mineral Commodity Summaries 2026: Aluminum	report	2026
USGS Mineral Commodity Summaries 2026: Bauxite and Alumina	report	2026
USGS Mineral Commodity Summaries 2026: Magnesium Metal	report	2026
USGS Mineral Commodity Summaries 2026: Silicon	report	2026
European Commission: critical raw materials (2023 list of 34)	report
PubChem: Aluminum, CID 5359268 (safety and hazards)	database
PubChem: Magnesium, CID 5462224 (safety and hazards)	database
PubChem: Silicon, CID 5461123 (safety and hazards)	database

Full record

The complete spore, as stored. Free to reuse under CC-BY-4.0. Images keep the licence shown with each one.

Show the full YAML

spore: profile
id: aluminium-6063
spore_version: 0.2
family: aluminium-alloys
name: Aluminium alloy 6063
abbreviation: '6063'
role: architectural extrusion alloy
category: metals
type: aluminium
summary: 6063 is an aluminium alloy with magnesium and silicon as its main additions, and Alloys International calls it the architectural extrusion alloy. It extrudes into thin walls and intricate shapes and takes the smooth, uniform surface that anodising needs. Its strength is moderate, with a minimum T6 tensile strength of 195 to 215 MPa for the extruded forms in BS EN 755-2 as printed by AZoM, and its welding is rated excellent.
best_for: Architectural extrusions such as window and door frames, rails and trim that need a smooth anodised finish (Alloys International; AZoM).
weakest_at: 'Strength: Alloys International says 6061 is the higher-strength choice for structural parts, and no space-environment, cryogenic or galvanic data were found for 6063.'
identity:
  formula: 'Al-Mg-Si alloy; composition limits in wt%: Al balance, Mg 0.45 to 0.9, Si 0.2 to 0.6, Fe 0 to 0.35, Cu 0 to 0.1, Mn 0 to 0.1, Zn 0 to 0.1, Ti 0 to 0.1, Cr max 0.1'
  source: azom-6063
  where: Table 1, 6063 column (composition in % by weight); the Mg and Si limits match the nominal chemistry on the Alloys International page
  designations:
    - system: EN
      code: '3.3206'
      source: alloysintl-6063
      where: Designations and cross reference table, Werkstoff (W.Nr) 3.3206
    - system: EN name
      code: EN AW-6063
      source: alloysintl-6063
      where: Designations and cross reference table, EN designation EN AW-6063 / AlMg0.7Si
    - system: EN name
      code: AlMg0.7Si
      note: chemical-symbol form of the EN name
      source: alloysintl-6063
      where: Designations and cross reference table, EN designation, name after the slash
    - system: UNS
      code: A96063
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), UNS A96063
    - system: AA
      code: '6063'
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), AA6063
    - system: ASTM
      code: B210
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), ASTM B210
    - system: ASTM
      code: B221
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), ASTM B221
    - system: ASTM
      code: B241
      note: pipe, seamless
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), ASTM B241 (Pipe- Seamless)
    - system: ASTM
      code: B345
      note: pipe, seamless
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), ASTM B345 (Pipe- Seamless)
    - system: ASTM
      code: B361
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), ASTM B361
    - system: ASTM
      code: B429
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), ASTM B429
    - system: ASTM
      code: B483
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), ASTM B483
    - system: ASTM
      code: B491
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), ASTM B491
    - system: MIL
      code: G-18014
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), MIL G-18014
    - system: MIL
      code: G-18015
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), MIL G-18015
    - system: MIL
      code: P-25995
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), MIL P-25995
    - system: MIL
      code: W-85
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), MIL W-85
    - system: QQ
      code: QQA-200/9
      source: alloysintl-6063
      where: Specifications list, QQA-200/9
    - system: SAE
      code: J454
      source: azom-6063
      where: Alloy Designations list (page groups 6063 with 6063A), SAE J454
tags:
  environments: []
  stresses: []
  applications:
    - structures
    - thermal-control
properties:
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, typical, T5
    value: 27
    unit: ksi
    scope: material
    conditions:
      temper: T5
      product_form: not stated (the page says values vary with section size, product form and processing)
      basis: typical value printed with a tilde (approximate); the page says for reference only, not for design
    method: Typical value printed in a supplier table (Alloys International, typical mechanical properties)
    status: ground
    source: alloysintl-6063
    where: Typical mechanical properties table, row T5, column Tensile strength
  - benchmark: yield_strength
    label: Yield strength, typical, T5
    value: 21
    unit: ksi
    scope: material
    conditions:
      temper: T5
      product_form: not stated (the page says values vary with section size, product form and processing)
      basis: typical value printed with a tilde (approximate); the page says for reference only, not for design
    method: Typical value printed in a supplier table (Alloys International, typical mechanical properties)
    status: ground
    source: alloysintl-6063
    where: Typical mechanical properties table, row T5, column Yield strength
  - benchmark: elongation
    label: Elongation, typical, T5
    value: 8
    unit: '%'
    scope: material
    conditions:
      temper: T5
      product_form: not stated (the page says values vary with section size, product form and processing)
      basis: typical value printed with a tilde (approximate); the page says for reference only, not for design
    method: Typical value printed in a supplier table (Alloys International, typical mechanical properties)
    status: ground
    source: alloysintl-6063
    where: Typical mechanical properties table, row T5, column Elongation
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, typical, T6
    value: 35
    unit: ksi
    scope: material
    conditions:
      temper: T6
      product_form: not stated (the page says values vary with section size, product form and processing)
      basis: typical value printed with a tilde (approximate); the page says for reference only, not for design
    method: Typical value printed in a supplier table (Alloys International, typical mechanical properties)
    status: ground
    source: alloysintl-6063
    where: Typical mechanical properties table, row T6, column Tensile strength
  - benchmark: yield_strength
    label: Yield strength, typical, T6
    value: 31
    unit: ksi
    scope: material
    conditions:
      temper: T6
      product_form: not stated (the page says values vary with section size, product form and processing)
      basis: typical value printed with a tilde (approximate); the page says for reference only, not for design
    method: Typical value printed in a supplier table (Alloys International, typical mechanical properties)
    status: ground
    source: alloysintl-6063
    where: Typical mechanical properties table, row T6, column Yield strength
  - benchmark: elongation
    label: Elongation, typical, T6
    value: 10
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: not stated (the page says values vary with section size, product form and processing)
      basis: typical value printed with a tilde (approximate); the page says for reference only, not for design
    method: Typical value printed in a supplier table (Alloys International, typical mechanical properties)
    status: ground
    source: alloysintl-6063
    where: Typical mechanical properties table, row T6, column Elongation
  - benchmark: yield_strength
    label: Proof stress, minimum, T4 extruded rod and bar
    value: 90
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T4
      product_form: extruded rod and bar
      size: up to 150 mm diameter or across flats (A/F)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min; the table prints the name Proof Stress
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (c), row Proof Stress
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, minimum, T4 extruded rod and bar
    value: 150
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T4
      product_form: extruded rod and bar
      size: up to 150 mm diameter or across flats (A/F)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (c), row Tensile Strength
  - benchmark: elongation
    label: Elongation A50 mm, minimum, T4 extruded rod and bar
    value: 10
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T4
      product_form: extruded rod and bar
      size: up to 150 mm diameter or across flats (A/F)
      gauge: A50 mm
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (c), row Elongation A50 mm
  - benchmark: elongation
    label: Elongation A, minimum, T4 extruded rod and bar
    value: 12
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T4
      product_form: extruded rod and bar
      size: up to 150 mm diameter or across flats (A/F)
      gauge: A (printed as Elongation A; gauge length not printed)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (c), row Elongation A
  - benchmark: yield_strength
    label: Proof stress, minimum, T6 rod and bar up to 150 mm
    value: 170
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: rod and bar
      size: up to 150 mm diameter and across flats (A/F)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min; the table prints the name Proof Stress
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (d), row Proof Stress
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, minimum, T6 rod and bar up to 150 mm
    value: 215
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: rod and bar
      size: up to 150 mm diameter and across flats (A/F)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (d), row Tensile Strength
  - benchmark: elongation
    label: Elongation A50 mm, minimum, T6 rod and bar up to 150 mm
    value: 8
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: rod and bar
      size: up to 150 mm diameter and across flats (A/F)
      gauge: A50 mm
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (d), row Elongation A50 mm
  - benchmark: elongation
    label: Elongation A, minimum, T6 rod and bar up to 150 mm
    value: 10
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: rod and bar
      size: up to 150 mm diameter and across flats (A/F)
      gauge: A (printed as Elongation A; gauge length not printed)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (d), row Elongation A
  - benchmark: yield_strength
    label: Proof stress, minimum, T6 rod and bar 150 to 200 mm
    value: 160
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: rod and bar
      size: 150 mm to 200 mm diameter and across flats (A/F)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min; the table prints the name Proof Stress
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (e), row Proof Stress
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, minimum, T6 rod and bar 150 to 200 mm
    value: 195
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: rod and bar
      size: 150 mm to 200 mm diameter and across flats (A/F)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (e), row Tensile Strength
  - benchmark: elongation
    label: Elongation A, minimum, T6 rod and bar 150 to 200 mm
    value: 10
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: rod and bar
      size: 150 mm to 200 mm diameter and across flats (A/F)
      gauge: A (printed as Elongation A; gauge length not printed)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (e), row Elongation A
  - benchmark: yield_strength
    label: Proof stress, minimum, T6 tube up to 25 mm wall
    value: 170
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: tube
      size: up to 25 mm wall thickness
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min; the table prints the name Proof Stress
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (f), row Proof Stress
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, minimum, T6 tube up to 25 mm wall
    value: 215
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: tube
      size: up to 25 mm wall thickness
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (f), row Tensile Strength
  - benchmark: elongation
    label: Elongation A50 mm, minimum, T6 tube up to 25 mm wall
    value: 8
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: tube
      size: up to 25 mm wall thickness
      gauge: A50 mm
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (f), row Elongation A50 mm
  - benchmark: elongation
    label: Elongation A, minimum, T6 tube up to 25 mm wall
    value: 10
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: tube
      size: up to 25 mm wall thickness
      gauge: A (printed as Elongation A; gauge length not printed)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (f), row Elongation A
  - benchmark: yield_strength
    label: Proof stress, minimum, T6 profiles up to 10 mm wall
    value: 170
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: profiles
      size: up to 10 mm wall thickness
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min; the table prints the name Proof Stress
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (g), row Proof Stress
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, minimum, T6 profiles up to 10 mm wall
    value: 215
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: profiles
      size: up to 10 mm wall thickness
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (g), row Tensile Strength
  - benchmark: elongation
    label: Elongation A50 mm, minimum, T6 profiles up to 10 mm wall
    value: 6
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: profiles
      size: up to 10 mm wall thickness
      gauge: A50 mm
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (g), row Elongation A50 mm
  - benchmark: elongation
    label: Elongation A, minimum, T6 profiles up to 10 mm wall
    value: 8
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: profiles
      size: up to 10 mm wall thickness
      gauge: A (printed as Elongation A; gauge length not printed)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (g), row Elongation A
  - benchmark: yield_strength
    label: Proof stress, minimum, T6 profiles 10 to 25 mm wall
    value: 160
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: profiles
      size: 10 mm to 25 mm wall thickness
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min; the table prints the name Proof Stress
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (h), row Proof Stress
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, minimum, T6 profiles 10 to 25 mm wall
    value: 195
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: profiles
      size: 10 mm to 25 mm wall thickness
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (h), row Tensile Strength
  - benchmark: elongation
    label: Elongation A50 mm, minimum, T6 profiles 10 to 25 mm wall
    value: 6
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: profiles
      size: 10 mm to 25 mm wall thickness
      gauge: A50 mm
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (h), row Elongation A50 mm
  - benchmark: elongation
    label: Elongation A, minimum, T6 profiles 10 to 25 mm wall
    value: 8
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: profiles
      size: 10 mm to 25 mm wall thickness
      gauge: A (printed as Elongation A; gauge length not printed)
      standard: BS EN 755-2 as printed by AZoM
      basis: minimum value printed as Min
    method: Minimum value in a table of BS EN 755-2 requirements (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 2 (h), row Elongation A
  - benchmark: density
    label: Density
    value: 2700
    unit: kg/m3
    scope: material
    conditions:
      temperature: not stated
      basis: value printed in Table 4, physical properties
    method: Value printed in a physical-properties table (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 4, row Density
  - benchmark: melting_point
    label: Melting point
    value: 600
    unit: °C
    scope: material
    conditions:
      basis: single value printed; no range given
    method: Value printed in a physical-properties table (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 4, row Melting Point
  - benchmark: elastic_modulus
    label: Modulus of elasticity
    value: 69.5
    unit: GPa
    scope: material
    conditions:
      temperature: not stated
    method: Value printed in a physical-properties table (AZoM article, sourced from Aalco)
    status: ground
    source: azom-6063
    where: Table 4, row Modulus of Elasticity
  - benchmark: electrical_resistivity
    label: Electrical resistivity
    value: 0.35
    unit: µΩ·m
    scope: material
    conditions:
      temperature: not stated
      unit_in_source: 0.35 x 10 -6 Ω.m
    method: Value printed in a physical-properties table (AZoM article, sourced from Aalco); written in µΩ·m, the same unit as the printed x 10 -6 Ω.m, which is kept in conditions.unit_in_source
    status: ground
    source: azom-6063
    where: Table 4, row Electrical Resistivity
  - benchmark: thermal_conductivity
    label: Thermal conductivity
    value: 200
    unit: W/(m·K)
    scope: material
    conditions:
      temperature: not stated
      unit_in_source: W/m.K
    method: Value printed in a physical-properties table (AZoM article, sourced from Aalco); the printed unit W/m.K is the same unit
    status: ground
    source: azom-6063
    where: Table 4, row Thermal Conductivity
  - benchmark: cte
    label: Thermal expansion coefficient
    value: 23.5
    unit: ppm/K
    scope: material
    conditions:
      temperature: not stated
      unit_in_source: x 10 -6 /K
    method: Value printed in a physical-properties table (AZoM article, sourced from Aalco); x 10^-6 /K is the same as ppm/K, and the printed form is kept in conditions.unit_in_source
    status: ground
    source: azom-6063
    where: Table 4, row Thermal Expansion
corrosion:
  - environment: General service (no environment named in the source)
    headline: AZoM describes 6063 as having high corrosion resistance
    effect: AZoM says 6063 has a good surface finish, high corrosion resistance, is readily suited to welding and can be easily anodised. The page names no environment, test or rate.
    rating: low
    conditions:
      basis: qualitative statement in the article introduction
    source: azom-6063
    where: Introduction paragraph
  - environment: General service (no environment named in the source)
    headline: Alloys International lists good corrosion resistance among its reasons to specify 6063
    effect: Alloys International lists good corrosion resistance and weldability under Why engineers specify 6063. It gives no environment, test or rate.
    rating: low
    conditions:
      basis: qualitative statement on a supplier page
    source: alloysintl-6063
    where: Why engineers specify 6063 list
risks:
  hazards:
    - text: 'PubChem aggregated GHS for aluminum metal (4,079 company reports): H261 in 90.8% of reports (in contact with water releases flammable gas), H228 in 60.6% (flammable solid) and H250 in 34.2% (catches fire spontaneously if exposed to air). 8.3% of reports say it does not meet GHS criteria. These are element-level statements, not a classification of 6063 as supplied.'
      ghs:
        - H261
        - H228
        - H250
      source: pubchem-al
      where: Safety and Hazards, GHS Classification (CID 5359268)
    - text: 'PubChem aggregated GHS for magnesium metal (2,205 company reports): H228 in 44.9% of reports, H250 in 36.5%, H252 in 18% (self-heating in large quantities), H260 in 36.7% and H261 in 44.8%. 18.4% of reports say it does not meet GHS criteria. These are element-level statements, not a classification of 6063.'
      ghs:
        - H228
        - H250
        - H252
        - H260
        - H261
      source: pubchem-mg
      where: Safety and Hazards, GHS Classification (CID 5462224)
    - text: 'PubChem aggregated GHS for silicon (3,263 company reports): 96.3% of reports say it does not meet GHS criteria. For the 121 reports that give hazard codes, PubChem shows no code above 10%, so none is listed. This is an element-level statement.'
      ghs: []
      source: pubchem-si
      where: Safety and Hazards, GHS Classification (CID 5461123)
  failure_risks:
    - mode: Movement of thick plate when large volumes are machined off
      trigger: Removing large volumes of material from thick plate
      consequence: The part can move. Alloys International says stress-relieved tempers limit this movement.
      source: alloysintl-6063
      where: Fabrication notes, Machining
  side_effects: []
  handling:
    - text: Heat-treatable alloys cut cleanest in the T temper. Thick plate benefits from a stress-relieved temper to limit movement when large volumes of material are removed.
      source: alloysintl-6063
      where: Fabrication notes, Machining
    - text: Form in the annealed or freshly solution treated condition where the temper allows, then age to final strength. Bend radii follow the temper and thickness in the governing specification.
      source: alloysintl-6063
      where: Fabrication notes, Forming
    - text: Suitable for all conventional welding methods. Welding wire is generally 5183 or 4043; 4043 where maximum electrical conductivity is needed; 5346 for strength and conductivity, with a larger weld to make up for lower conductivity.
      source: azom-6063
      where: Welding of 6063 Aluminium section
    - text: The 5xxx and 6xxx alloys weld readily with 4043 or 5356 filler. This is a series-level statement on the Alloys International page.
      source: alloysintl-6063
      where: Fabrication notes, Welding
    - text: T4 has good formability, and T6 is the most commonly available temper.
      source: azom-6063
      where: Introduction paragraph
  mitigations:
    - text: Order to the specification and condition the drawing requires, because properties vary with section size, product form and processing.
      source: alloysintl-6063
      where: Typical mechanical properties note
uses:
  - application: structures
    device: Window, door and curtain wall framing
    example: Listed among the typical applications; AZoM also lists window frames and doors
    source: alloysintl-6063
    where: Typical applications list
  - application: structures
    device: Architectural trim, railing and balustrading
    example: AZoM says balustrading rails and posts are normally T6 and formed elbows and bends are T4
    source: azom-6063
    where: Applications of 6063 Aluminium, balustrading paragraph
  - application: thermal-control
    device: Heat sinks
    example: Listed with enclosures; Alloys International says strength is rarely the governing factor there
    source: alloysintl-6063
    where: Typical applications list; introduction paragraph
supply:
  - subject: Aluminium (primary smelter production)
    producers:
      - country: China
        share_percent: 60.8
        year: 2025
      - country: India
        share_percent: 5.7
        year: 2025
      - country: Russia
        share_percent: 5.3
        year: 2025
      - country: Canada
        share_percent: 4.5
        year: 2025
      - country: United Arab Emirates
        share_percent: 3.6
        year: 2025
    recycling: 'USGS: in 2025 about 3.6 million tons of aluminum was recovered from purchased scrap in the United States, about 56% from new scrap and 44% from old scrap. Old-scrap recovery equalled about 28% of apparent consumption.'
    substitutes:
      - 'USGS: composites can substitute for aluminum in aircraft fuselages and wings.'
      - 'USGS: composites, magnesium, steel and titanium can substitute for aluminum in ground transportation uses.'
      - 'USGS: composites, steel, vinyl and wood can substitute for aluminum in construction.'
      - 'USGS: copper can replace aluminum in electrical and heat-exchange applications.'
    source: usgs-mcs2026-aluminum
    where: World Smelter Production and Capacity table, 2025e (world total 74,000 thousand t); shares calculated by Space Mushroom from the table; Recycling; Substitutes
  - subject: Bauxite (aluminium ore)
    abundance: 'USGS: bauxite resources are estimated to range from 55 billion to 75 billion tons, distributed in Africa (32%), Oceania (23%), South America and the Caribbean (21%), Asia (18%) and elsewhere (6%).'
    producers:
      - country: Guinea
        share_percent: 34.1
        year: 2025
      - country: Australia
        share_percent: 22
        year: 2025
      - country: China
        share_percent: 19.8
        year: 2025
      - country: Brazil
        share_percent: 7.5
        year: 2025
      - country: India
        share_percent: 5.7
        year: 2025
    critical_lists:
      - list: 'European Commission critical raw materials list, 2023 (34 materials): Bauxite listed'
        listed: true
    recycling: 'USGS: none.'
    substitutes:
      - 'USGS: bauxite is the only raw material used in the production of alumina on a commercial scale in the United States. Clay resources are technically feasible sources of alumina but are not currently economically competitive with bauxite.'
    source: usgs-mcs2026-bauxite
    where: World Alumina Refinery and Bauxite Mine Production table, bauxite 2025e (world total 440,000 thousand t); shares calculated by Space Mushroom; Recycling; Substitutes
  - subject: Alumina
    producers:
      - country: China
        share_percent: 62
        year: 2025
      - country: Australia
        share_percent: 11.3
        year: 2025
      - country: Brazil
        share_percent: 7.3
        year: 2025
      - country: India
        share_percent: 5.5
        year: 2025
      - country: Russia
        share_percent: 1.9
        year: 2025
    source: usgs-mcs2026-bauxite
    where: World Alumina Refinery and Bauxite Mine Production table, alumina production 2025e (world total 150,000 thousand t); shares calculated by Space Mushroom
  - subject: Magnesium (primary production)
    abundance: 'USGS: resources from which magnesium may be recovered range from large to virtually unlimited, and magnesium could be recovered from seawater along world coastlines.'
    producers:
      - country: China
        share_percent: 86.4
        year: 2025
      - country: Russia
        share_percent: 5.5
        year: 2025
      - country: Israel
        share_percent: 1.8
        year: 2025
      - country: Brazil
        share_percent: 1.8
        year: 2025
      - country: Turkey
        share_percent: 1.4
        year: 2025
      - country: Kazakhstan
        share_percent: 1.2
        year: 2025
    critical_lists:
      - list: 'European Commission critical raw materials list, 2023 (34 materials): Magnesium listed'
        listed: true
    recycling: 'USGS: in 2025 about 26,000 tons of secondary magnesium was recovered from old scrap and 82,000 tons from new scrap.'
    substitutes:
      - 'USGS: aluminum and zinc may substitute for magnesium in castings and wrought products. Magnesium''s light weight is an advantage, but its high cost is a disadvantage relative to these substitutes.'
    source: usgs-mcs2026-magnesium
    where: World Primary Production table, 2025 smelter production (world total 1,100 thousand t); shares calculated by Space Mushroom; Recycling; Substitutes
  - subject: Silicon (silicon metal)
    abundance: 'USGS: world and domestic resources for making silicon metal and alloys are abundant and, in most producing countries, adequate to supply world requirements for many decades.'
    producers:
      - country: China
        share_percent: 87
        year: 2025
      - country: Brazil
        share_percent: 3.9
        year: 2025
      - country: Norway
        share_percent: 2.8
        year: 2025
      - country: France
        share_percent: 1.5
        year: 2025
      - country: Russia
        share_percent: 0.8
        year: 2025
    critical_lists:
      - list: 'USGS 2025 List of Critical Minerals: silicon added in 2025 (per the MCS 2026 silicon chapter)'
        listed: true
      - list: 'European Commission critical raw materials list, 2023 (34 materials): Silicon metal listed'
        listed: true
    recycling: 'USGS: insignificant.'
    substitutes:
      - 'USGS: aluminum, silicon carbide and silicomanganese can be substituted for ferrosilicon in some applications.'
      - 'USGS: gallium arsenide and germanium are the principal substitutes for silicon in semiconductor and infrared applications.'
    source: usgs-mcs2026-silicon
    where: World Production table, silicon metal 2025 (world total 4,600 thousand t, rounded); shares calculated by Space Mushroom. The chapter also says China accounted for almost 80% of global silicon-materials production in 2025.
media: []
documents:
  - title: 'Alloys International: 6063 grade page'
    type: datasheet
    url: https://alloysintl.com/inventory/aluminum-alloys/aluminum-6063/
  - title: 'AZoM: Aluminium Alloys - Aluminium 6063/6063A Properties, Fabrication and Applications (sourced from Aalco)'
    type: datasheet
    url: https://www.azom.com/article.aspx?ArticleID=2812
    year: 2020
  - title: 'USGS Mineral Commodity Summaries 2026: Aluminum'
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-aluminum.pdf
    year: 2026
  - title: 'USGS Mineral Commodity Summaries 2026: Bauxite and Alumina'
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-bauxite-alumina.pdf
    year: 2026
  - title: 'USGS Mineral Commodity Summaries 2026: Magnesium Metal'
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-magnesium-metal.pdf
    year: 2026
  - title: 'USGS Mineral Commodity Summaries 2026: Silicon'
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-silicon.pdf
    year: 2026
  - title: 'European Commission: critical raw materials (2023 list of 34)'
    type: report
    url: https://single-market-economy.ec.europa.eu/sectors/raw-materials/areas-specific-interest/critical-raw-materials_en
  - title: 'PubChem: Aluminum, CID 5359268 (safety and hazards)'
    type: database
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5359268
  - title: 'PubChem: Magnesium, CID 5462224 (safety and hazards)'
    type: database
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5462224
  - title: 'PubChem: Silicon, CID 5461123 (safety and hazards)'
    type: database
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5461123
gaps:
  - T1 and T83 values were not found. The sources opened print T4, T5 and T6 only. Wikipedia prints T1 values, but it is limited here to composition and history, and the Alcoa datasheet it cites returned 404.
  - The Alloys International T5 and T6 figures are approximate typical values in ksi, printed with a tilde. They are kept in ksi and are not matched to the MPa minima, because no source printed converted values.
  - The BS EN 755-2 minima and the physical values come from an AZoM article that says its data is indicative only. The standard, the ASTM B221 and B429 tables and any manufacturer datasheet with physical values were not opened.
  - No cryogenic strength or conductivity, vacuum outgassing (TML and CVCM), atomic-oxygen, thermal-vacuum or flight data for 6063 were found in the sources opened.
  - No galvanic, alkali, acid, marine or stress-corrosion data for 6063 were found. The corrosion entries are qualitative statements only.
  - Anodising is recorded only as qualitative statements (excellent, easily anodised). No anodic film thickness, sealing or colour data were found.
  - No figure for strength loss in the heat-affected zone after welding was found in a source opened for this profile.
  - 'Designations: AZoM also prints GS10, A-GS, HE19, AlMgSi0.5 and 3.32206 without naming their systems, or they conflict with other sources (3.32206 against 3.3206 from Alloys International; HE19 against HE9 in Wikipedia). They are not recorded. The AZoM list covers 6063 and 6063A together, so the ASTM, MIL, QQ and SAE rows should be checked against the standards.'
  - 'Critical minerals: the USGS 2025 list page returned 403 and was not read. The USGS silicon chapter says silicon was added in 2025. The 2025 status of aluminium and magnesium is not printed in the chapters read. The EU 2023 list prints bauxite, magnesium and silicon metal, but not aluminium.'
  - Hazards are element-level PubChem GHS data for aluminium, magnesium and silicon. No safety data sheet for 6063 was opened, and hazards from dust or fumes produced by machining or welding were not found.
  - Supply shares are calculated by Space Mushroom from USGS tables that print tonnages and world totals. The USGS recycling figures are for aluminium and magnesium in general, not for 6063 scrap.
  - Brinell hardness values printed by AZoM are not recorded, because hardness is not in the property list.
  - 'Not reached in this run: the Alcoa datasheet (404), MatWeb (403) and the USGS 2025 critical-mineral list page (403).'
sources:
  alloysintl-6063:
    title: 'Alloys International: 6063 grade page (W.Nr 3.3206, EN AW-6063 / AlMg0.7Si, nominal chemistry, typical T5 and T6 values, applications)'
    id: Alloys International (stockist), Ronkonkoma, NY; grade page for 6063
    url: https://alloysintl.com/inventory/aluminum-alloys/aluminum-6063/
    kind: datasheet
    license: supplier web page (cited, not reproduced)
  azom-6063:
    title: 'AZoM: Aluminium Alloys - Aluminium 6063/6063A Properties, Fabrication and Applications (article sourced from Aalco)'
    id: AZoM article 2812; cited in the article as Aalco (2020, October 16)
    url: https://www.azom.com/article.aspx?ArticleID=2812
    year: 2020
    kind: web
    license: AZoM web article (cited, not reproduced)
  usgs-mcs2026-aluminum:
    title: Mineral Commodity Summaries 2026, Aluminum
    id: USGS MCS 2026, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-aluminum.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
  usgs-mcs2026-bauxite:
    title: Mineral Commodity Summaries 2026, Bauxite and Alumina
    id: USGS MCS 2026, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-bauxite-alumina.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
  usgs-mcs2026-magnesium:
    title: Mineral Commodity Summaries 2026, Magnesium Metal
    id: USGS MCS 2026, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-magnesium-metal.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
  usgs-mcs2026-silicon:
    title: Mineral Commodity Summaries 2026, Silicon
    id: USGS MCS 2026, February 2026; the chapter also states the 2025 critical-mineral list changes
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-silicon.pdf
    year: 2026
    kind: report
    license: public domain (USGS)
  ec-crm:
    title: Critical raw materials (European Commission, fifth list of 34 critical raw materials, 2023)
    id: European Commission critical raw materials page
    url: https://single-market-economy.ec.europa.eu/sectors/raw-materials/areas-specific-interest/critical-raw-materials_en
    kind: web
    license: European Commission web page
  pubchem-al:
    title: 'Aluminum, PubChem compound CID 5359268: Safety and Hazards, GHS Classification'
    id: PubChem CID 5359268 (PUG View JSON); aggregated from ECHA C&L notifications
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5359268
    kind: database
    license: PubChem (NCBI) public data
  pubchem-mg:
    title: 'Magnesium, PubChem compound CID 5462224: Safety and Hazards, GHS Classification'
    id: PubChem CID 5462224 (PUG View JSON); aggregated from ECHA C&L notifications
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5462224
    kind: database
    license: PubChem (NCBI) public data
  pubchem-si:
    title: 'Silicon, PubChem compound CID 5461123: Safety and Hazards, GHS Classification'
    id: PubChem CID 5461123 (PUG View JSON); aggregated from ECHA C&L notifications
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5461123
    kind: database
    license: PubChem (NCBI) public data
license: CC-BY-4.0
updated: '2026-10-24'
review:
  status: draft
  method: assistant
  checked_values: 35
  unreachable: 0
  caveats: 6
  note: 'Written 2026-10-24 from pages fetched in this run: the Alloys International 6063 page, the AZoM 6063/6063A article (sourced from Aalco), the USGS MCS 2026 aluminum, bauxite and alumina, magnesium and silicon chapters, the European Commission critical raw materials page, and PubChem GHS for aluminum, magnesium and silicon. The six Alloys International values are approximate typical values in ksi. The other property rows are BS EN 755-2 minima and physical values from an AZoM article that calls its data indicative only. T1 and T83 values were not found.'
story:
  recipe:
    line: 'Al-Mg-Si alloy. Composition limits in wt% (AZoM, Table 1): magnesium 0.45 to 0.9, silicon 0.2 to 0.6, iron up to 0.35, copper, manganese, zinc and titanium up to 0.1 each, chromium up to 0.1, and aluminium the balance. The Alloys International page gives the same magnesium and silicon limits. AZoM says solution treatment with natural ageing gives T4, and solution treatment with artificial ageing gives T6.'
    parts:
      - name: Aluminium
        symbol: Al
        role: Matrix of the alloy; the balance of the composition (AZoM, Table 1)
        share_note: balance
        source: azom-6063
        where: Table 1, Al row (Balance)
      - name: Magnesium
        symbol: Mg
        role: Main alloying addition, with silicon (AZoM, Table 1; Alloys International nominal chemistry)
        share_percent: 0.45
        share_high: 0.9
        source: azom-6063
        where: Table 1, Mg row (0.45 to 0.9)
      - name: Silicon
        symbol: Si
        role: Main alloying addition, with magnesium (AZoM, Table 1; Alloys International nominal chemistry)
        share_percent: 0.2
        share_high: 0.6
        source: azom-6063
        where: Table 1, Si row (0.2 to 0.6)
      - name: Iron
        symbol: Fe
        role: Limit only, maximum printed in Table 1
        share_percent: 0
        share_high: 0.35
        source: azom-6063
        where: Table 1, Fe row (0 to0.35)
      - name: Copper
        symbol: Cu
        role: Limit only, maximum printed in Table 1
        share_percent: 0
        share_high: 0.1
        source: azom-6063
        where: Table 1, Cu row (0 to0.1)
      - name: Manganese
        symbol: Mn
        role: Limit only, maximum printed in Table 1
        share_percent: 0
        share_high: 0.1
        source: azom-6063
        where: Table 1, Mn row (0 to0.1)
      - name: Zinc
        symbol: Zn
        role: Limit only, maximum printed in Table 1
        share_percent: 0
        share_high: 0.1
        source: azom-6063
        where: Table 1, Zn row (0 to0.1)
      - name: Titanium
        symbol: Ti
        role: Limit only, maximum printed in Table 1
        share_percent: 0
        share_high: 0.1
        source: azom-6063
        where: Table 1, Ti row (0 to0.1)
      - name: Chromium
        symbol: Cr
        role: Limit only, maximum printed in Table 1
        share_percent: 0
        share_high: 0.1
        share_note: maximum, printed as 0.1 max
        source: azom-6063
        where: Table 1, Cr row (0.1 max)
  risk_groups:
    - title: For people
      lead: No safety data sheet for 6063 was opened. Element-level PubChem GHS data for aluminium, magnesium and silicon is in the hazards list.
      gap: Hazard classification of 6063 as supplied, and of dust or fumes from machining or welding, was not found.
      points:
        - label: What the sources cover
          line: The sources describe finish, corrosion, extrusion and welding behaviour, not health effects. Read the supplier's safety data sheet before cutting, grinding or welding.
    - title: If it fails
      lead: Failure routes that the sources name. None of them is a field-incident record.
      points:
        - label: Movement during machining
          line: Alloys International says thick plate can move when large volumes are removed, and recommends a stress-relieved temper to limit this.
        - label: Corrosion
          line: AZoM and Alloys International both describe good to high corrosion resistance. Neither names an environment that attacks 6063.
        - label: Welding
          line: The sources rate gas, arc and resistance welding as excellent (AZoM). No figure for strength loss near a weld was found in a source opened for this profile.
    - title: Handling and storage
      points:
        - label: Forming and machining
          line: Form in the annealed or freshly solution treated condition where the temper allows, then age to final strength. Cut heat-treatable alloys in the T temper.
        - label: Welding filler
          line: Use 5183 or 4043 filler generally, 4043 where maximum electrical conductivity is needed, and 5346 for strength and conductivity (AZoM).
  why: 6063 is an aluminium alloy with magnesium (0.45 to 0.9 wt%) and silicon (0.2 to 0.6 wt%) as its main additions (AZoM, Table 1). Alloys International calls it the architectural extrusion alloy. Compared with 6061 it has less silicon and magnesium, so it extrudes into thinner walls and more intricate shapes, and it gives the smooth, uniform surface that anodising needs. Its strength is moderate, which is rarely the deciding factor in window frames, rails, trim, heat sinks and enclosures.
  uses:
    - where: Window, door and curtain wall framing
      line: Alloys International lists window, door and curtain wall framing among its typical applications, and AZoM lists window frames and doors.
    - where: Architectural trim, railing and balustrading
      line: AZoM says balustrading rails and posts are normally T6 and formed elbows and bends are T4. T4 is also used for hydroformed chassis tube.
    - where: Heat sinks
      line: Alloys International lists heat sinks and enclosures, where strength is rarely the deciding factor.
  can_do:
    - label: Strength, T6
      line: Minimum tensile strength of T6 rod and bar up to 150 mm is 215 MPa, with a minimum proof stress of 170 MPa (BS EN 755-2 values printed by AZoM). Alloys International's typical T6 figures are about 35 ksi tensile and 31 ksi yield.
      value: 215 MPa minimum tensile; about 35 ksi typical
    - label: Strength, T4
      line: T4 extruded rod and bar up to 150 mm has a minimum tensile strength of 150 MPa and a minimum proof stress of 90 MPa (AZoM).
      value: 150 MPa minimum tensile
    - label: Ductility
      line: Minimum elongation A50 mm is 8% for T6 rod and bar up to 150 mm and 10% for T4 extruded rod and bar (AZoM).
    - label: Weight
      line: Density is 2700 kg/m3 (AZoM, Table 4).
    - label: Stiffness
      line: Modulus of elasticity is 69.5 GPa (AZoM, Table 4).
    - label: Heat conduction
      line: Thermal conductivity is 200 W/m.K (AZoM, Table 4).
    - label: Thermal expansion
      line: The linear thermal expansion coefficient is 23.5 x 10^-6 /K (AZoM, Table 4).
    - label: Anodising
      line: Alloys International calls the anodised finish excellent, and AZoM says 6063 can be easily anodised. No anodic film thickness or sealing data was found.
      value: Excellent (Alloys International)
    - label: Welding
      line: AZoM rates gas, arc and resistance welding as excellent, brazing as excellent and solderability as good. Alloys International says 5xxx and 6xxx alloys weld readily with 4043 or 5356 filler.
      value: Excellent (gas, arc, resistance)
    - label: Machining
      line: AZoM rates machinability and cold workability as average.
  compare: The sources give no strength-per-mass figures for 6063 against other alloys, so this profile does not rank it. Alloys International says 6061 is the higher-strength choice for structural parts. The USGS lists composites, magnesium, steel and titanium as substitutes for aluminium in ground transport, and composites, steel, vinyl and wood in construction.
  compare_rows:
    - label: Density
      benchmark: density
    - label: Thermal conductivity
      benchmark: thermal_conductivity
    - label: Thermal expansion
      benchmark: cte
  handling:
    - 'Machining: cut heat-treatable alloys in the T temper. For thick plate, use a stress-relieved temper to limit movement (Alloys International).'
    - 'Forming: form in the annealed or freshly solution treated condition where the temper allows, then age to final strength (Alloys International).'
    - 'Welding: use 5183 or 4043 filler generally, and 5346 for strength and conductivity (AZoM).'
    - 'Safety: no safety data sheet for 6063 was opened, so read the supplier''s data sheet before cutting or welding.'
  good_for:
    - Architectural extrusions, such as window and door frames, rails and trim, that need a smooth anodised finish (Alloys International; AZoM).
    - Heat sinks, where a thermal conductivity of 200 W/m.K spreads heat (AZoM, Table 4).
    - Welded assemblies, since gas, arc and resistance welding are all rated excellent (AZoM).
  watch_out:
    - Strength is moderate. Alloys International says 6061 is the higher-strength choice for structural parts.
    - The Alloys International strengths are approximate typical values in ksi and are not for design. The AZoM strengths are BS EN 755-2 minima.
    - T1 and T83 values were not found, so the file has no rows for them.
    - No galvanic, alkali or acid data, no space-environment data and no cryogenic values were found for 6063.
  verdict: '6063 is the architectural extrusion alloy: moderate strength, excellent weldability, a finish that anodises well, and good corrosion resistance in general use. The sources give no T1 or T83 values and no space-environment data.'

References

Every number above carries a reference number. Click one to see the source and where in it the value comes from.

References
Source	Type	Year	Used for
Alloys International: 6063 grade page (W.Nr 3.3206, EN AW-6063 / AlMg0.7Si, nominal chemistry, typical T5 and T6 values, applications)	datasheet		14 values
AZoM: Aluminium Alloys - Aluminium 6063/6063A Properties, Fabrication and Applications (article sourced from Aalco)	web	2020	34 values
Mineral Commodity Summaries 2026, Aluminum	report	2026	1 value
Mineral Commodity Summaries 2026, Bauxite and Alumina	report	2026	2 values
Mineral Commodity Summaries 2026, Magnesium Metal	report	2026	1 value
Mineral Commodity Summaries 2026, Silicon	report	2026	1 value
Critical raw materials (European Commission, fifth list of 34 critical raw materials, 2023)	web		0 values
Aluminum, PubChem compound CID 5359268: Safety and Hazards, GHS Classification	database		1 value
Magnesium, PubChem compound CID 5462224: Safety and Hazards, GHS Classification	database		1 value
Silicon, PubChem compound CID 5461123: Safety and Hazards, GHS Classification	database		1 value

References
Identity
Formula	Al-Mg-Si alloy; composition limits in wt%: Al balance, Mg 0.45 to 0.9, Si 0.2 to 0.6, Fe 0 to 0.35, Cu 0 to 0.1, Mn 0 to 0.1, Zn 0 to 0.1, Ti 0 to 0.1, Cr max 0.1
Role	architectural extrusion alloy
Benchmarks	35

Read
Read
Which aluminium alloy to choose: 6061, 7075, 5052, 5083 and moreMaterial selection
Best materials for heat sinks: copper, aluminium or AlN?Material selection

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Stainless steel vs aluminium
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References
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References
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