Aluminium casting alloy A206.0 A206.0
Al-Cu-Mg-Mn-Ti casting alloy. SAE composition (Total Materia): copper 4.2 to 5.0 %, iron 0.10 % maximum, aluminium the remainder. Nominal composition per the eFunda 206.0 page (weight %): aluminium 94.33 %, copper 4.60 %, magnesium 0.25 %, manganese 0.35 %, silicon 0.10 %, titanium 0.22 %, iron 0.15 %. The two iron figures disagree and both are kept.
Also known as UNS A02060, UNS A12060, AA A206.0, AMS AMS4235
Aluminium casting alloy A206.0 is an aluminium-copper casting alloy with 4.2 to 5.0 % copper, per the SAE chemical composition table.
Evidence level
2 of 5
Lab-measured
- 0Predicted only. No one has made it, or no measurement exists.
- 1Calculated. Only calculated or predicted values from sources.
- 2Lab-measured. Measured properties with their conditions stated.
- 3Space-relevant tests. Measured in conditions relevant to space, such as vacuum or atomic oxygen.
- 4Ground-qualified. Qualified for an application on the ground.
- 5Flown or field-proven. Flight or field results exist.
Recipe, share of the weight
- Al balance (the rest)Aluminium
- Cu 4.2 to 5%Copper
- Mn nominal, per eFundaManganese
- Mg nominal, per eFundaMagnesium
- Ti nominal, per eFundaTitanium
- Si nominal, per eFundaSilicon
- Fe maximum 0.10 % (SAE); nominal 0.15 % (eFunda)Iron
Best for
Structural castings in the heat-treated temper, cast in sand or permanent molds (ASM and eFunda describe these uses)
Weakest at
Ductility: the SAE table prints a minimum elongation of 1.5 % (at least 1.5 %), and no alloy-specific corrosion or weldability test was found
Risk at a glance
- People None found. No hazard class found for the alloy
- If it fails High. Galvanic attack when the casting touches more noble metals in a conductive liquid
- Corrosion Severe. The NASA handbook calls galvanic attack on aluminium severe. It is a general statement, not a test of A206.0.
Quick facts: A206.0
| Property | Value | Basis |
|---|---|---|
| Density | 2.6 to 2.9 g/cm³ | 1 sourced value |
| Yield strength | 165 to 350 MPa | 2 sourced values across conditions |
| Tensile strength | 275 to 440 MPa | 3 sourced values across conditions |
| Young's modulus | 69 to 79 GPa | 1 sourced value |
| Hardness (Brinell) | 85 to 135 HB | 1 sourced value |
| Thermal conductivity | 120 W/(m·K) | 1 sourced value |
| Melting point | 570 °C | 1 sourced value |
| Specific heat | 920 J/(kg·K) | 1 sourced value |
What is the density of Aluminium casting alloy A206.0?
Aluminium casting alloy A206.0 has a density of 2.6 to 2.9 g/cm³. The source and test conditions are listed in the properties table on this page.
What is the thermal conductivity of Aluminium casting alloy A206.0?
Aluminium casting alloy A206.0 has a thermal conductivity of 120 W/(m·K). The source and test conditions are listed in the properties table on this page.
What is the melting point of Aluminium casting alloy A206.0?
Aluminium casting alloy A206.0 has a melting point of 570 °C. The source and test conditions are listed in the properties table on this page.
What is the yield strength of Aluminium casting alloy A206.0?
Aluminium casting alloy A206.0 has a yield strength of 165 to 350 MPa. The range covers 2 sourced values across the tempers, forms and test conditions the sources report; room-temperature values are used where a source states a temperature.
What is the tensile strength of Aluminium casting alloy A206.0?
Aluminium casting alloy A206.0 has a tensile strength of 275 to 440 MPa. The range covers 3 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 casting alloy A206.0?
Aluminium casting alloy A206.0 is also written as UNS A02060, UNS A12060, AA A206.0, AMS AMS4235. Each code is printed in the source listed beside it in the designations table.
What is Aluminium casting alloy A206.0 used for?
Uses recorded in the sources include Heat-treated structural castings; Aerospace casting specification (SAE AMS4235A); Sand and permanent-mold castings.
Why it exists
A206.0 is an aluminium-copper casting alloy used for structural castings in the heat-treated temper. Copper is its main alloying element, and the SAE table prints 4.2 to 5.0 % copper. The same table gives a tensile minimum of 310 MPa, and an aggregator page gives 440.0 MPa for the T7 temper. The density and modulus in the SAE table let the stiffness-to-weight case be checked against printed numbers.
Where it's used
Structural castings
The ASM alloy digest abstract says 206.0 and A206.0 are structural castings in the heat treated temper for applications requiring high. The public abstract stops at that point, so the full application list was not read.
Aerospace casting specification
SAE AMS4235A covers this aluminium alloy in sand, permanent mold and composite mold castings. Its title names the A206.0-T71 temper.
Sand and permanent-mold foundry
eFunda says the alloy is usually used in sand casting and permanent mold casting.
Recipe
Al-Cu-Mg-Mn-Ti casting alloy. SAE composition (Total Materia): copper 4.2 to 5.0 %, iron 0.10 % maximum, aluminium the remainder. Nominal composition per the eFunda 206.0 page (weight %): aluminium 94.33 %, copper 4.60 %, magnesium 0.25 %, manganese 0.35 %, silicon 0.10 %, titanium 0.22 %, iron 0.15 %. The two iron figures disagree and both are kept.
Aluminium casting alloy of the Al-Cu type. Aluminium is the matrix, with copper (4.2 to 5.0 %, SAE) as the main alloying element and small manganese, magnesium, titanium and silicon additions. The SAE data sheet prints a solution and precipitation heat treatment for the alloy.
| Ingredient | Share of the weight | What it does |
|---|---|---|
| Aluminium Al | balance (the rest) | The matrix of the alloy. |
| Copper Cu | 4.2 to 5% | Main alloying element; this makes it an Al-Cu casting alloy. |
| Manganese Mn | nominal, per eFunda | Minor addition. |
| Magnesium Mg | nominal, per eFunda | Minor addition. |
| Titanium Ti | nominal, per eFunda | Minor addition. |
| Silicon Si | nominal, per eFunda | Minor addition. |
| Iron Fe | maximum 0.10 % (SAE); nominal 0.15 % (eFunda) | Impurity kept within a maximum. |
Weight shares are as printed in the sources.
What it can do
Strength
Reach a tensile strength of 440.0 MPa in the T7 temper, per an aggregator page (not a minimum).
Strength
Stay stiff, with an elastic modulus of 69 to 79 GPa at 0 to 30 °C, per the SAE table.
Strength
Give a Brinell hardness of 85 to 135 HB at 0 to 30 °C, per the SAE table.
How it compares
A206.0 is a casting alloy, so its strength depends on copper content and heat treatment. The SAE table prints a tensile minimum of 310 MPa and an elongation minimum of 1.5 %, while the aggregator T7 values are 440.0 MPa and 12.0 %. The T4 range on the aggregator page, 275.0 to 345.0 MPa tensile, is lower than the T7 value, which shows the effect of the temper. No other profile is used here for the comparison, so each figure is read from its own source.
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.
| Measurement | A206.0 | 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 | 6063 | 6082 | 6101 | AA7050 | AA8011 | Au-Al IMCs | Al master alloys |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thermal behavior and safety | ||||||||||||||||||||||||||||||||
| Melting point, A206.0 (aggregator page) | 570 °C9 | 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 | 600 °C | 575 °C | 1090 °F | 490 °C | 640 to 655 °C | no data | 880 °C |
| Thermal conductivity, A206.0 T7 (aggregator page) | 120 W/(m·K)10 | 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) | 200 W/(m·K) | 180 W/(m·K) | 218 W/(m·K) | 154 W/(m·K) | 210 to 220 W/(m·K) | no data | no data |
| Specific heat capacity, A206.0 T7 (aggregator page) | 920 J/(kg·K)11 | no data | 960 J/kg·K | 0.875 J/g-°C | no data | no data | no data | 900 J/(kg·K) | no data | no data | no data | 0.88 J/(g·°C) | 0.88 J/g-°C | 0.86 J/g.°C | no data | no data | no data | 893 J/(kg·K) | no data | 904 J/(kg·K) | no data | no data | 898 J/(kg·K) | 900 J/(kg·K) | no data | no data | 896 J/(kg·K) | no data | 0.86 J/g°C | no data | no data | no data |
| Physical and electrical | ||||||||||||||||||||||||||||||||
| Density, A206.0 (SAE physical properties) | 2.6 kg/dm31 | 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 | 2700 kg/m3 | 2.7 g/cm³ | 0.097 lb/cu.in | 2.83 g/cm³ | 2.71 g/cm³ | no data | no data |
| Brinell hardness, A206.0 (SAE mechanical properties) | 85 HB4 | no data | no data | no data | no data | no data | no data | no data | 35 HB | 105 HB | no data | 105 HB | 105 HB | no data | no data | 120 HB | no data | 45 HB | no data | 65 to 95 HB | no data | no data | no data | no data | no data | no data | no data | no data | no data | no data | no data | no data |
| Other measurements | ||||||||||||||||||||||||||||||||
| Modulus of elasticity, A206.0 (SAE physical properties) | 69 GPa2 | 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 | 69.5 GPa | 70 GPa | 69 GPa | 71.5 GPa | 70 GPa | no data | no data |
| Tensile strength, A206.0 (SAE mechanical properties, minimum) | 310 MPa3 | 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 | 27 ksi | > 300 MPa | 32000 psi | > 483 MPa | 180 to 195 MPa | no data | no data |
| Elongation, A206.0 (SAE mechanical properties, minimum) | 1.5 %5 | 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 % | 8 % | > 9 % | > 8 % | > 7 % | > 1 % | no data | no data |
| Tensile strength, A206.0 T7 (aggregator page) | 440 MPa6 | 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 | 27 ksi | > 300 MPa | 32000 psi | > 483 MPa | 180 to 195 MPa | no data | no data |
| Yield strength, A206.0 T7 (aggregator page) | 350 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 | 118 MPa | > 125 MPa | > 120 MPa | > 80 MPa | 350 MPa | 21 ksi | > 255 MPa | 28000 psi | > 414 MPa | no data | no data | no data |
| Elongation, A206.0 T7 (aggregator page, printed as 12.0 %) | 12 %8 | 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 % | 8 % | > 9 % | > 8 % | > 7 % | > 1 % | no data | no data |
| Tensile strength, A206.0 T4 (aggregator page, range) | 275 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 | 27 ksi | > 300 MPa | 32000 psi | > 483 MPa | 180 to 195 MPa | no data | no data |
| Yield strength, A206.0 T4 (aggregator page, range) | 165 MPa13 | 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 | 118 MPa | > 125 MPa | > 120 MPa | > 80 MPa | 350 MPa | 21 ksi | > 255 MPa | 28000 psi | > 414 MPa | no data | no data | no data |
| Elongation, A206.0 T4 (aggregator page, range printed as 6.0 to 10.0 %) | 6 %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 % | 8 % | > 9 % | > 8 % | > 7 % | > 1 % | no data | no data |
Why choose it, and why not
Good for
- Heat-treated structural castings where tensile strength matters: 440.0 MPa in T7, per an aggregator page.
- Sand and permanent-mold castings, which eFunda gives as the usual route.
Watch out for
- Ductility: the SAE table prints a minimum elongation of 1.5 %, and the T4 aggregator range is 6.0 to 10.0 %.
- Corrosion in chloride or sea water: no A206.0 test was found, and the NASA handbook calls galvanic attack severe.
- Thermal conductivity and specific heat come from a single aggregator page, so check them before design.
A206.0 is a strength-first casting alloy whose tensile figures are documented in the SAE and aggregator tables. No source read here shows its corrosion or ductility in service.
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.
| System | Codes |
|---|---|
| UNS | A02060, A12060 |
| AA | A206.0 |
| AMS | AMS4235 (specification AMS4235A, title names the A206.0-T71 temper) |
Notes
The method, full conditions and any caveat for the numbered rows above.
| # | Measurement | Method | Conditions | Caveat |
|---|---|---|---|---|
| 1 | Density, A206.0 (SAE physical properties) | Range printed in the Total Materia physical properties table as 2.6 — 2.9 kg/dm³ | temperature 0 to 30 °C (table header)temper not shown in the free view of the page | — |
| 2 | Modulus of elasticity, A206.0 (SAE physical properties) | Range printed in the Total Materia physical properties table as 69 — 79 GPa | temperature 0 to 30 °C (table header)temper not shown in the free view of the page | — |
| 3 | Tensile strength, A206.0 (SAE mechanical properties, minimum) | Minimum printed in the Total Materia mechanical properties table; the temper is not shown in the free view | minimum printed as ≥ 310 MPatemperature 0 to 30 °C (table header)temper not shown in the free view of the page | — |
| 4 | Brinell hardness, A206.0 (SAE mechanical properties) | Range printed in the Total Materia mechanical properties table as 85 — 135 for Brinell Hardness (HB); brinell_hardness is not yet in the property canon | temperature 0 to 30 °C (table header)temper not shown in the free view of the page | — |
| 5 | Elongation, A206.0 (SAE mechanical properties, minimum) | Minimum printed in the Total Materia mechanical properties table as Elongation, A | minimum printed as ≥ 1.5 %temperature 0 to 30 °C (table header)temper not shown in the free view of the page | — |
| 6 | Tensile strength, A206.0 T7 (aggregator page) | Value on an aggregator page labelled T7; not a manufacturer datasheet | temper T7, as labelled on the pagenote the page does not say whether the value is typical or a minimum | — |
| 7 | Yield strength, A206.0 T7 (aggregator page) | Value on an aggregator page labelled T7; not a manufacturer datasheet | temper T7, as labelled on the pagenote the page does not say whether the value is typical or a minimum | — |
| 8 | Elongation, A206.0 T7 (aggregator page, printed as 12.0 %) | Value on an aggregator page labelled T7; not a manufacturer datasheet | temper T7, as labelled on the pagenote the page does not say whether the value is typical or a minimum | — |
| 9 | Melting point, A206.0 (aggregator page) | Value on an aggregator page labelled T7; not a manufacturer datasheet | temper T7, as labelled on the pagenote a single value is printed; an alloy normally melts over a range | — |
| 10 | Thermal conductivity, A206.0 T7 (aggregator page) | Value on an aggregator page labelled T7; not a manufacturer datasheet | temper T7, as labelled on the pagetemperature not stated on the page | — |
| 11 | Specific heat capacity, A206.0 T7 (aggregator page) | Value on an aggregator page labelled T7; not a manufacturer datasheet | temper T7, as labelled on the pagetemperature not stated on the page | — |
| 12 | Tensile strength, A206.0 T4 (aggregator page, range) | Range on an aggregator page labelled T4; not a manufacturer datasheet | temper T4, as labelled on the pagenote the page prints a range and does not say whether it is typical or a minimum | — |
| 13 | Yield strength, A206.0 T4 (aggregator page, range) | Range on an aggregator page labelled T4; not a manufacturer datasheet | temper T4, as labelled on the pagenote the page prints a range and does not say whether it is typical or a minimum | — |
| 14 | Elongation, A206.0 T4 (aggregator page, range printed as 6.0 to 10.0 %) | Range on an aggregator page labelled T4; not a manufacturer datasheet | temper T4, as labelled on the pagenote the page prints a range and does not say whether it is typical or a minimum | — |
Corrosion and compatibility
What happens when it meets other materials and environments.
| Environment | Concern | What happens |
|---|---|---|
| Waters containing chloride or other halogen ions | not rated | No A206.0 corrosion test was found. The 1972 NASA handbook says chloride waters pit aluminium, but it does not test this alloy.1 |
| Contact with more noble metals in a conductive liquid (galvanic coupling), especially sea water | severe | The NASA handbook calls galvanic attack on aluminium severe. It is a general statement, not a test of A206.0.2 |
| # | Environment | Details | Test conditions |
|---|---|---|---|
| 1 | Waters containing chloride or other halogen ions | The handbook says pitting attack occurs in waters containing chloride or other halogen ions, particularly at crevices or stagnant areas, and that aluminium purity significantly affects corrosion resistance. It also says traces of copper, iron and mercury ions promote localized attack by galvanic cells. Those are copper ions in solution, not the copper in this alloy, and the handbook gives no result for A206.0. | basis general statements about aluminium in a 1972 NASA handbook; no A206.0 testalloy A206.0 is not discussed in the passage read |
| 2 | Contact with more noble metals in a conductive liquid (galvanic coupling), especially sea water | The handbook says aluminum is strongly anodic to most other common metals, so galvanic coupling with them generally produces severe attack on the aluminum, especially in sea water. | basis general statement about aluminium in a 1972 NASA handbook; not alloy-specificalloy A206.0 is not tested |
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 the A206.0 casting alloy was read. The only hazard entry is a PubChem record for aluminium, which carries a water-reactivity statement that does not clearly apply to solid castings.
- Hazard statement
- PubChem's aluminium record lists H261, 'In contact with water releases flammable gas', under a Danger signal word.
- Dust and fume
- No source read in this run covers dust or fume for this alloy.
Galvanic contact in water
The NASA handbook says aluminium corrodes first when coupled to more noble metals in a conductive liquid.
- Sea water
- The handbook says galvanic coupling generally produces severe attack on the aluminum, especially in sea water.
- Chloride water
- The same handbook says pitting occurs in waters containing chloride or other halogen ions.
Test details
The original wording and numbers from the sources, for readers who want them.
Failure risks
| Failure | Trigger and consequence |
|---|---|
| Galvanic attack when the casting touches more noble metals in a conductive liquidhigh severity | Contact with more noble metals, especially in sea waterThe NASA handbook says galvanic coupling generally produces severe attack on the aluminum, especially in sea water. |
| Pitting in chloride-containing watermoderate severity | Waters containing chloride or other halogen ions, particularly at crevices or stagnant areasThe NASA handbook says pitting attack occurs in such waters, where passivity breakdown is accelerated by differential aeration. |
Handling and storage
- Keep the casting insulated from more noble metals where it may be wet or in sea water, because the NASA handbook calls aluminum strongly anodic to most other common metals.
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%
- Critical mineral lists
- EU: listed
- Recycling
- USGS: aluminum recovered from purchased scrap in the United States was about 3.6 million tons in 2025.
Documents
Datasheets, safety data sheets, papers and standards you can open.
| Document | Type | Year |
|---|---|---|
| Total Materia: SAE A206.0 aluminium alloy properties (chemical composition, physical, mechanical, equivalents) | database | 2023 |
| NASA CR-123772 (1972), aluminium corrosion chapter | report | 1972 |
| PubChem: aluminium (CID 5359268), GHS classification | database | 2026 |
| USGS Mineral Commodity Summaries 2026: Aluminum | report | 2026 |
Full record
The complete spore, as stored. Free to reuse under CC-BY-4.0. Images keep the licence shown with each one.
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spore: profile
id: aluminium-a206
spore_version: 0.2
family: aluminium-alloys
name: Aluminium casting alloy A206.0
abbreviation: A206.0
role: structural casting alloy
category: metals
type: aluminium
summary: |
Aluminium casting alloy A206.0 is an aluminium-copper casting alloy with 4.2 to 5.0 % copper, per the SAE chemical composition table. An aggregator page reads a tensile strength of 440.0 MPa and a yield strength of 350.0 MPa for the T7 condition, and 275.0 to 345.0 MPa tensile for the T4 condition. The SAE physical properties table gives a density of 2.6 to 2.9 kg/dm3 and an elastic modulus of 69 to 79 GPa. No flight, vacuum or radiation result for this alloy was found.
best_for: Structural castings in the heat-treated temper, cast in sand or permanent molds (ASM and eFunda describe these uses)
weakest_at: 'Ductility: the SAE table prints a minimum elongation of 1.5 % (at least 1.5 %), and no alloy-specific corrosion or weldability test was found'
identity:
formula: 'Al-Cu-Mg-Mn-Ti casting alloy. SAE composition (Total Materia): copper 4.2 to 5.0 %, iron 0.10 % maximum, aluminium the remainder. Nominal composition per the eFunda 206.0 page (weight %): aluminium 94.33 %, copper 4.60 %, magnesium 0.25 %, manganese 0.35 %, silicon 0.10 %, titanium 0.22 %, iron 0.15 %. The two iron figures disagree and both are kept.'
source: totalmateria-a206
where: SAE A206.0 Chemical Composition table (Cu 4.2 to 5.0 %, Fe 0.10 % maximum); nominal composition from the eFunda 206.0 page (efunda-206)
designations:
- system: UNS
code: A02060
source: totalmateria-a206
where: International Equivalent Materials table, UNS row, marked Official
- system: UNS
code: A12060
note: second UNS number printed by the same source for this alloy; sources disagree on the UNS number
source: totalmateria-a206
where: International Equivalent Materials table, UNS row
- system: AA
code: A206.0
source: totalmateria-a206
where: International Equivalent Materials table, AA row
- system: AMS
code: AMS4235
note: specification AMS4235A, title names the A206.0-T71 temper
source: saemobilus-ams4235a
where: Page title, AMS4235A Aluminum Alloy Castings, 4.6Cu - 0.35Mn - 0.25Mg - 0.22Ti (A206.0-T71)
tags:
applications:
- structures
properties:
- benchmark: density
label: Density, A206.0 (SAE physical properties)
value: 2.6
value_high: 2.9
unit: kg/dm3
scope: material
conditions:
temperature: 0 to 30 °C (table header)
temper: not shown in the free view of the page
method: Range printed in the Total Materia physical properties table as 2.6 — 2.9 kg/dm³
status: ground
source: totalmateria-a206
where: SAE A206.0 Physical Properties table, Density row
- benchmark: elastic_modulus
label: Modulus of elasticity, A206.0 (SAE physical properties)
value: 69
value_high: 79
unit: GPa
scope: material
conditions:
temperature: 0 to 30 °C (table header)
temper: not shown in the free view of the page
method: Range printed in the Total Materia physical properties table as 69 — 79 GPa
status: ground
source: totalmateria-a206
where: SAE A206.0 Physical Properties table, Modulus of Elasticity row
- benchmark: ultimate_tensile_strength
label: Tensile strength, A206.0 (SAE mechanical properties, minimum)
value: 310
unit: MPa
scope: material
conditions:
minimum: printed as ≥ 310 MPa
temperature: 0 to 30 °C (table header)
temper: not shown in the free view of the page
method: Minimum printed in the Total Materia mechanical properties table; the temper is not shown in the free view
status: ground
source: totalmateria-a206
where: SAE A206.0 Mechanical Properties table, Tensile Strength row
- benchmark: brinell_hardness
label: Brinell hardness, A206.0 (SAE mechanical properties)
value: 85
value_high: 135
unit: HB
scope: material
conditions:
temperature: 0 to 30 °C (table header)
temper: not shown in the free view of the page
method: Range printed in the Total Materia mechanical properties table as 85 — 135 for Brinell Hardness (HB); brinell_hardness is not yet in the property canon
status: ground
source: totalmateria-a206
where: SAE A206.0 Mechanical Properties table, Brinell Hardness (HB) row
- benchmark: elongation
label: Elongation, A206.0 (SAE mechanical properties, minimum)
value: 1.5
unit: '%'
scope: material
conditions:
minimum: printed as ≥ 1.5 %
temperature: 0 to 30 °C (table header)
temper: not shown in the free view of the page
method: Minimum printed in the Total Materia mechanical properties table as Elongation, A
status: ground
source: totalmateria-a206
where: SAE A206.0 Mechanical Properties table, Elongation, A row
- benchmark: ultimate_tensile_strength
label: Tensile strength, A206.0 T7 (aggregator page)
value: 440
unit: MPa
scope: material
conditions:
temper: T7, as labelled on the page
note: the page does not say whether the value is typical or a minimum
method: Value on an aggregator page labelled T7; not a manufacturer datasheet
status: ground
source: mfgrobots-t7
where: Mechanical table, Tensile strength row, T7
- benchmark: yield_strength
label: Yield strength, A206.0 T7 (aggregator page)
value: 350
unit: MPa
scope: material
conditions:
temper: T7, as labelled on the page
note: the page does not say whether the value is typical or a minimum
method: Value on an aggregator page labelled T7; not a manufacturer datasheet
status: ground
source: mfgrobots-t7
where: Mechanical table, Yield strength row, T7
- benchmark: elongation
label: Elongation, A206.0 T7 (aggregator page, printed as 12.0 %)
value: 12
unit: '%'
scope: material
conditions:
temper: T7, as labelled on the page
note: the page does not say whether the value is typical or a minimum
method: Value on an aggregator page labelled T7; not a manufacturer datasheet
status: ground
source: mfgrobots-t7
where: Mechanical table, Elongation row, T7
- benchmark: melting_point
label: Melting point, A206.0 (aggregator page)
value: 570
unit: °C
scope: material
conditions:
temper: T7, as labelled on the page
note: a single value is printed; an alloy normally melts over a range
method: Value on an aggregator page labelled T7; not a manufacturer datasheet
status: ground
source: mfgrobots-t7
where: Thermal table, Melting point row, T7
- benchmark: thermal_conductivity
label: Thermal conductivity, A206.0 T7 (aggregator page)
value: 120
unit: W/(m·K)
scope: material
conditions:
temper: T7, as labelled on the page
temperature: not stated on the page
method: Value on an aggregator page labelled T7; not a manufacturer datasheet
status: ground
source: mfgrobots-t7
where: Thermal table, Thermal conductivity row, T7
- benchmark: specific_heat
label: Specific heat capacity, A206.0 T7 (aggregator page)
value: 920
unit: J/(kg·K)
scope: material
conditions:
temper: T7, as labelled on the page
temperature: not stated on the page
method: Value on an aggregator page labelled T7; not a manufacturer datasheet
status: ground
source: mfgrobots-t7
where: Thermal table, Specific heat capacity row, T7
- benchmark: ultimate_tensile_strength
label: Tensile strength, A206.0 T4 (aggregator page, range)
value: 275
value_high: 345
unit: MPa
scope: material
conditions:
temper: T4, as labelled on the page
note: the page prints a range and does not say whether it is typical or a minimum
method: Range on an aggregator page labelled T4; not a manufacturer datasheet
status: ground
source: mfgrobots-t4
where: Mechanical table, Tensile strength row, T4
- benchmark: yield_strength
label: Yield strength, A206.0 T4 (aggregator page, range)
value: 165
value_high: 193
unit: MPa
scope: material
conditions:
temper: T4, as labelled on the page
note: the page prints a range and does not say whether it is typical or a minimum
method: Range on an aggregator page labelled T4; not a manufacturer datasheet
status: ground
source: mfgrobots-t4
where: Mechanical table, Yield strength row, T4
- benchmark: elongation
label: Elongation, A206.0 T4 (aggregator page, range printed as 6.0 to 10.0 %)
value: 6
value_high: 10
unit: '%'
scope: material
conditions:
temper: T4, as labelled on the page
note: the page prints a range and does not say whether it is typical or a minimum
method: Range on an aggregator page labelled T4; not a manufacturer datasheet
status: ground
source: mfgrobots-t4
where: Mechanical table, Elongation row, T4
corrosion:
- environment: Waters containing chloride or other halogen ions
headline: No A206.0 corrosion test was found. The 1972 NASA handbook says chloride waters pit aluminium, but it does not test this alloy.
effect: The handbook says pitting attack occurs in waters containing chloride or other halogen ions, particularly at crevices or stagnant areas, and that aluminium purity significantly affects corrosion resistance. It also says traces of copper, iron and mercury ions promote localized attack by galvanic cells. Those are copper ions in solution, not the copper in this alloy, and the handbook gives no result for A206.0.
rating: unknown
conditions:
basis: general statements about aluminium in a 1972 NASA handbook; no A206.0 test
alloy: A206.0 is not discussed in the passage read
source: nasa-cr123772
where: Chapter 10 (aluminium), aqueous corrosion passage
- environment: Contact with more noble metals in a conductive liquid (galvanic coupling), especially sea water
headline: The NASA handbook calls galvanic attack on aluminium severe. It is a general statement, not a test of A206.0.
effect: The handbook says aluminum is strongly anodic to most other common metals, so galvanic coupling with them generally produces severe attack on the aluminum, especially in sea water.
rating: severe
conditions:
basis: general statement about aluminium in a 1972 NASA handbook; not alloy-specific
alloy: A206.0 is not tested
source: nasa-cr123772
where: Chapter 10 (aluminium), aqueous corrosion passage
risks:
hazards:
- text: PubChem's aluminium record carries the GHS statement H261, 'In contact with water releases flammable gas', under a Danger signal word. The record does not say which aluminium form it applies to, and no safety data sheet for the A206.0 casting alloy was read.
ghs:
- H261
source: pubchem-al
where: GHS Classification section of PubChem CID 5359268
failure_risks:
- mode: Galvanic attack when the casting touches more noble metals in a conductive liquid
trigger: Contact with more noble metals, especially in sea water
consequence: The NASA handbook says galvanic coupling generally produces severe attack on the aluminum, especially in sea water.
severity: high
source: nasa-cr123772
where: Chapter 10 (aluminium), aqueous corrosion passage
- mode: Pitting in chloride-containing water
trigger: Waters containing chloride or other halogen ions, particularly at crevices or stagnant areas
consequence: The NASA handbook says pitting attack occurs in such waters, where passivity breakdown is accelerated by differential aeration.
severity: moderate
source: nasa-cr123772
where: Chapter 10 (aluminium), aqueous corrosion passage
handling:
- text: Keep the casting insulated from more noble metals where it may be wet or in sea water, because the NASA handbook calls aluminum strongly anodic to most other common metals.
source: nasa-cr123772
where: Chapter 10 (aluminium), aqueous corrosion passage
uses:
- application: structures
device: Heat-treated structural castings
example: ASM's alloy digest abstract says 206.0 and A206.0 are structural castings in the heat treated temper for applications requiring high; the public abstract stops at that point.
source: asm-al335
where: Abstract, first sentence (the full datasheet is behind a subscription)
- application: structures
device: Aerospace casting specification (SAE AMS4235A)
example: SAE AMS4235A covers an aluminum alloy in the form of sand, permanent mold, and composite mold castings, and its title names the A206.0-T71 temper.
source: saemobilus-ams4235a
where: Abstract scope statement and page title
- application: structures
device: Sand and permanent-mold castings
example: eFunda says the alloy is usually used in sand casting and permanent mold casting.
source: efunda-206
where: Description paragraph of the 206.0 glossary page
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
critical_lists:
- list: EU critical raw materials list (European Commission page, which says 'Aluminium and bauxite have been merged for consistency reasons')
listed: true
recycling: 'USGS: aluminum recovered from purchased scrap in the United States was about 3.6 million tons in 2025.'
substitutes: []
source: usgs-mcs2026-aluminum
where: World Smelter Production table, 2025e (world total 74,000 thousand t; shares calculated by Space Mushroom); Recycling. The critical list line is from the EC page (ec-crm).
documents:
- title: 'Total Materia: SAE A206.0 aluminium alloy properties (chemical composition, physical, mechanical, equivalents)'
type: database
url: https://www.totalmateria.com/en-us/material/3017082
year: 2023
- title: NASA CR-123772 (1972), aluminium corrosion chapter
type: report
url: https://ntrs.nasa.gov/citations/19720022808
year: 1972
- title: 'PubChem: aluminium (CID 5359268), GHS classification'
type: database
url: https://pubchem.ncbi.nlm.nih.gov/compound/5359268
year: 2026
- title: 'USGS Mineral Commodity Summaries 2026: Aluminum'
type: report
url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-aluminum.pdf
year: 2026
gaps:
- No EN or DIN number for A206.0 was printed in a source read in this run. ICAST's EN AC-21100 sheet describes a different Al-Cu grade with its own composition, so it is not treated as the same alloy.
- The Total Materia values for density, modulus, tensile strength, Brinell hardness and elongation do not show the temper in the free view. The page header gives only 0 to 30 °C.
- The T7 and T4 values come from aggregator pages, not a manufacturer datasheet. Their figures are kept with their labels and not confirmed against a second source.
- A second aggregator density figure disagrees with the SAE range and is not recorded.
- Coefficient of thermal expansion and electrical resistivity are printed with exponents on the aggregator page, so they are left out.
- The full ASM Alloy Digest datasheet (composition, physical and mechanical tables) is behind a subscription and was not readable; only its abstract was read.
- 'The AMS4235A page is an abstract only: no minimum mechanical values were printed, so none are recorded from that source.'
- Iron content disagrees between the SAE table (0.10 % maximum) and the eFunda nominal (0.15 %). Both are kept in the identity.
- No corrosion, stress-corrosion or weldability test for A206.0 was found. The corrosion rating is unknown, and the galvanic rating comes from a general statement about aluminium.
- No flight, vacuum, thermal-cycling or radiation result for A206.0 was found.
- The USGS critical-minerals page could not be read in this run, so no USGS list status is recorded for aluminium.
- No safety data sheet for the A206.0 casting alloy was read. Dust and fume hazards are not recorded.
- The shear, fatigue and high-temperature properties of A206.0 were not found in a source read in this run.
sources:
totalmateria-a206:
title: SAE A206.0 Aluminium Alloys (Total Materia material page)
id: Total Materia material 3017082; latest update 2023-05
url: https://www.totalmateria.com/en-us/material/3017082
year: 2023
kind: database
license: Total Materia free view (cited, not reproduced)
mfgrobots-t7:
title: 'AA 206.0 T7 Aluminum Alloy: Comprehensive Mechanical & Thermal Properties (MfgRobots)'
id: MfgRobots material article 34105
url: https://www.mfgrobots.com/Article/material/metal/34105.html
kind: web
license: web page, cited not reproduced
mfgrobots-t4:
title: 'AA 206.0 T4 Aluminum Alloy: Key Mechanical Properties & Performance (MfgRobots)'
id: MfgRobots material article 36730
url: https://www.mfgrobots.com/Article/material/metal/36730.html
kind: web
license: web page, cited not reproduced
efunda-206:
title: 'eFunda Glossary: Aluminum Alloy 206.0'
id: eFunda glossary, cast aluminium 206.0
url: https://www.efunda.com/glossary/materials/alloys/materials--alloys--aluminum_alloy--cast--206.0.cfm
kind: web
license: web page, cited not reproduced
asm-al335:
title: Aluminum Alloy 206.0, A206.0 Premium Casting Alloy (ASM Alloy Digest AL-335)
id: ASM Alloy Digest AL-335
url: https://dl.asminternational.org/alloy-digest/article/44/6/Al-335/5844/ALUMINUM-ALLOY-206-0-A206-0Premium-Casting-Alloy
kind: datasheet
license: ASM subscription, abstract cited
saemobilus-ams4235a:
title: AMS4235A Aluminum Alloy Castings, 4.6Cu - 0.35Mn - 0.25Mg - 0.22Ti (A206.0-T71) Solution and Precipitation Heat Treated
id: SAE AMS4235A
url: https://saemobilus.sae.org/content/AMS4235A/
kind: standard
license: SAE subscription, abstract cited
nasa-cr123772:
title: NASA CR-123772 (1972), aluminium handbook including Chapter 10 on corrosion
id: NTRS 19720022808
url: https://ntrs.nasa.gov/citations/19720022808
year: 1972
kind: report
license: public domain (NASA)
pubchem-al:
title: PubChem compound record, aluminium (CID 5359268)
id: CID 5359268
url: https://pubchem.ncbi.nlm.nih.gov/compound/5359268
year: 2026
kind: database
license: public domain (NCBI)
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)
ec-crm:
title: Critical raw materials (European Commission, list under Regulation (EU) 2024/1252)
id: Regulation (EU) 2024/1252
url: https://single-market-economy.ec.europa.eu/sectors/raw-materials/areas-specific-interest/critical-raw-materials_en
year: 2024
kind: web
license: European Commission web page
license: CC-BY-4.0
updated: '2026-11-01'
review:
status: draft
method: assistant
checked_values: 14
unreachable: 3
caveats: 4
note: Written by an AI assistant on 2026-11-01 from pages read in this run. Aggregator values are labelled as such; the full ASM and SAE texts were not readable.
story:
recipe:
line: Aluminium casting alloy of the Al-Cu type. Aluminium is the matrix, with copper (4.2 to 5.0 %, SAE) as the main alloying element and small manganese, magnesium, titanium and silicon additions. The SAE data sheet prints a solution and precipitation heat treatment for the alloy.
parts:
- name: Aluminium
symbol: Al
share_note: balance (the rest)
role: The matrix of the alloy.
- name: Copper
symbol: Cu
share_percent: 4.2
share_high: 5
role: Main alloying element; this makes it an Al-Cu casting alloy.
- name: Manganese
symbol: Mn
share_percent: 0.35
share_note: nominal, per eFunda
role: Minor addition.
- name: Magnesium
symbol: Mg
share_percent: 0.25
share_note: nominal, per eFunda
role: Minor addition.
- name: Titanium
symbol: Ti
share_percent: 0.22
share_note: nominal, per eFunda
role: Minor addition.
- name: Silicon
symbol: Si
share_percent: 0.1
share_note: nominal, per eFunda
role: Minor addition.
- name: Iron
symbol: Fe
share_note: maximum 0.10 % (SAE); nominal 0.15 % (eFunda)
role: Impurity kept within a maximum.
risk_groups:
- title: For people
level: 0
verdict: No hazard class found for the alloy
lead: No safety data sheet for the A206.0 casting alloy was read. The only hazard entry is a PubChem record for aluminium, which carries a water-reactivity statement that does not clearly apply to solid castings.
points:
- label: Hazard statement
line: PubChem's aluminium record lists H261, 'In contact with water releases flammable gas', under a Danger signal word.
- label: Dust and fume
line: No source read in this run covers dust or fume for this alloy.
- title: Galvanic contact in water
verdict: Severe attack when coupled to noble metals
lead: The NASA handbook says aluminium corrodes first when coupled to more noble metals in a conductive liquid.
points:
- label: Sea water
line: The handbook says galvanic coupling generally produces severe attack on the aluminum, especially in sea water.
- label: Chloride water
line: The same handbook says pitting occurs in waters containing chloride or other halogen ions.
why: A206.0 is an aluminium-copper casting alloy used for structural castings in the heat-treated temper. Copper is its main alloying element, and the SAE table prints 4.2 to 5.0 % copper. The same table gives a tensile minimum of 310 MPa, and an aggregator page gives 440.0 MPa for the T7 temper. The density and modulus in the SAE table let the stiffness-to-weight case be checked against printed numbers.
uses:
- where: Structural castings
line: The ASM alloy digest abstract says 206.0 and A206.0 are structural castings in the heat treated temper for applications requiring high. The public abstract stops at that point, so the full application list was not read.
- where: Aerospace casting specification
line: SAE AMS4235A covers this aluminium alloy in sand, permanent mold and composite mold castings. Its title names the A206.0-T71 temper.
- where: Sand and permanent-mold foundry
line: eFunda says the alloy is usually used in sand casting and permanent mold casting.
can_do:
- label: Strength
line: Reach a tensile strength of 440.0 MPa in the T7 temper, per an aggregator page (not a minimum).
- label: Strength
line: Stay stiff, with an elastic modulus of 69 to 79 GPa at 0 to 30 °C, per the SAE table.
- label: Strength
line: Give a Brinell hardness of 85 to 135 HB at 0 to 30 °C, per the SAE table.
compare: A206.0 is a casting alloy, so its strength depends on copper content and heat treatment. The SAE table prints a tensile minimum of 310 MPa and an elongation minimum of 1.5 %, while the aggregator T7 values are 440.0 MPa and 12.0 %. The T4 range on the aggregator page, 275.0 to 345.0 MPa tensile, is lower than the T7 value, which shows the effect of the temper. No other profile is used here for the comparison, so each figure is read from its own source.
compare_rows:
- label: Density
benchmark: density
- label: Elastic modulus
benchmark: elastic_modulus
- label: Tensile strength (T7 aggregator value)
benchmark: ultimate_tensile_strength
handling:
- Keep the casting insulated from more noble metals where it may be wet or in sea water, because the NASA handbook calls aluminum strongly anodic to most other common metals.
- The alloy's safety data sheet was not read, so no dust or fume limits are given here.
good_for:
- 'Heat-treated structural castings where tensile strength matters: 440.0 MPa in T7, per an aggregator page.'
- Sand and permanent-mold castings, which eFunda gives as the usual route.
watch_out:
- 'Ductility: the SAE table prints a minimum elongation of 1.5 %, and the T4 aggregator range is 6.0 to 10.0 %.'
- 'Corrosion in chloride or sea water: no A206.0 test was found, and the NASA handbook calls galvanic attack severe.'
- Thermal conductivity and specific heat come from a single aggregator page, so check them before design.
verdict: A206.0 is a strength-first casting alloy whose tensile figures are documented in the SAE and aggregator tables. No source read here shows its corrosion or ductility in service.
References
Every number above carries a reference number. Click one to see the source and where in it the value comes from.
| # | Source | Type | Year | Used for |
|---|---|---|---|---|
| SAE A206.0 Aluminium Alloys (Total Materia material page) | database | 2023 | 6 values | |
| AA 206.0 T7 Aluminum Alloy: Comprehensive Mechanical & Thermal Properties (MfgRobots) | web | 6 values | ||
| AA 206.0 T4 Aluminum Alloy: Key Mechanical Properties & Performance (MfgRobots) | web | 3 values | ||
| eFunda Glossary: Aluminum Alloy 206.0 | web | 1 value | ||
| Aluminum Alloy 206.0, A206.0 Premium Casting Alloy (ASM Alloy Digest AL-335) | datasheet | 1 value | ||
| AMS4235A Aluminum Alloy Castings, 4.6Cu - 0.35Mn - 0.25Mg - 0.22Ti (A206.0-T71) Solution and Precipitation Heat Treated | standard | 1 value | ||
| NASA CR-123772 (1972), aluminium handbook including Chapter 10 on corrosion | report | 1972 | 5 values | |
| PubChem compound record, aluminium (CID 5359268) | database | 2026 | 1 value | |
| Mineral Commodity Summaries 2026, Aluminum | report | 2026 | 1 value | |
| Critical raw materials (European Commission, list under Regulation (EU) 2024/1252) | web | 2024 | 0 values |
Updated