spore: profile
id: aluminium-5083
spore_version: 0.2
family: aluminium-alloys
name: Aluminium alloy 5083
abbreviation: '5083'
role: marine structural alloy
category: metals
type: aluminium
summary: 5083 is a wrought aluminium-magnesium alloy with 4.00 to 4.90 wt% magnesium. Its suppliers describe it as the strongest of the non-heat-treatable aluminium alloys and as highly resistant to attack by seawater and industrial chemicals. It is used for ships, pressure vessels, vehicle bodies and rail cars, and the suppliers advise against use above 65 °C.
best_for: Welded marine structures and pressure vessels kept at or below 65 °C, where seawater resistance and strength matter (supplier datasheets)
weakest_at: Service above 65 °C, where the suppliers advise against use. It is a non-heat-treatable alloy (Dinco sheet). No space-environment data were found.
identity:
  formula: 'Al-Mg alloy; composition limits in wt% (Smith Metal datasheet): Mg 4.00 to 4.90, Mn 0.40 to 1.00, Cr 0.05 to 0.25, Fe max 0.40, Si max 0.40, Cu max 0.10, Zn max 0.25, Ti max 0.15, Al balance'
  source: smith-5083-datasheet
  where: Chemical Composition (weight %) table
  designations:
    - system: UNS
      code: A95083
      source: nist-5083
      where: 'Page title line, Material Properties: 5083 Aluminum (UNS A95083)'
    - system: EN
      code: '3.3547'
      source: alloysintl-5083
      where: Designations and cross reference table, Werkstoff (W.Nr) 3.3547
    - system: EN name
      code: EN AW-5083
      source: alloysintl-5083
      where: Designations and cross reference table, EN designation line
    - system: EN name
      code: AlMg4.5Mn0.7
      source: alloysintl-5083
      where: Same EN designation line, after the slash
    - system: AA
      code: '5083'
      source: dinco-5083h116
      where: Title line, Aluminium Alloy AA 5083 H116 Data Sheet
    - system: AMS
      code: '4056'
      source: alloysintl-5083
      where: Specifications list on the 5083 grade page (product form not printed)
    - system: MIL
      code: MIL-A-46027
      source: alloysintl-5083
      where: Specifications list on the 5083 grade page (product form not printed)
tags:
  environments: []
  stresses:
    - extreme-cold
  applications:
    - structures
    - propulsion-and-tanks
    - cryogenic-fuel
properties:
  - benchmark: yield_strength
    label: Proof stress, minimum, O/H111 sheet 0.2 to 6.3 mm
    value: 125
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: O/H111 (the table prints one set for both tempers)
      product_form: sheet, 0.2 to 6.3 mm
      standard: BS EN 485-2:2008, as printed
      offset: not printed
      basis: minimum value in the table
    method: Minimum value in a mechanical-properties table on a web article that quotes supplier data
    status: ground
    note: The table does not separate O from H111, and the proof-stress offset is not printed.
    source: azom-aalco-5083
    where: Table 2 (a), row Proof Stress
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, O/H111 sheet 0.2 to 6.3 mm
    value: 275
    value_high: 350
    bound: range
    unit: MPa
    scope: material
    conditions:
      temper: O/H111 (one set for both tempers)
      product_form: sheet, 0.2 to 6.3 mm
      standard: BS EN 485-2:2008, as printed
    method: Range in a mechanical-properties table on a web article that quotes supplier data
    status: ground
    source: azom-aalco-5083
    where: Table 2 (a), row Tensile Strength
  - benchmark: elongation
    label: Elongation A, O/H111 plate 80 to 120 mm
    value: 12
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: O/H111
      product_form: plate, 80 to 120 mm
      standard: BS EN 485-2:2008, as printed
      gauge_length: not printed
    method: Minimum value in a mechanical-properties table on a web article that quotes supplier data
    status: ground
    source: azom-aalco-5083
    where: Table 2 (c), row Elongation A
  - benchmark: hardness_brinell
    label: Brinell hardness, O/H111 sheet 0.2 to 6.3 mm
    value: 75
    unit: HB
    scope: material
    conditions:
      temper: O/H111 (one set for both tempers)
      product_form: sheet, 0.2 to 6.3 mm
    method: Value in a mechanical-properties table on a web article that quotes supplier data
    status: ground
    source: azom-aalco-5083
    where: Table 2 (a), row Hardness Brinell
  - benchmark: yield_strength
    label: Proof stress, O/H111 (datasheet)
    value: 145
    unit: MPa
    scope: material
    conditions:
      temper: O/H111 (the datasheet says its values are for O/H111)
      basis: printed without a minimum or typical marking
      offset: not printed
      product_form: not stated
    method: Value in a mechanical-properties table of a supplier datasheet
    status: ground
    note: The datasheet gives one set for O and H111 and does not mark the value as minimum or typical.
    source: smith-5083-datasheet
    where: Mechanical Properties table, Proof Stress
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, O/H111 (datasheet)
    value: 300
    unit: MPa
    scope: material
    conditions:
      temper: O/H111 (the datasheet says its values are for O/H111)
      basis: printed without a minimum or typical marking
    method: Value in a mechanical-properties table of a supplier datasheet
    status: ground
    source: smith-5083-datasheet
    where: Mechanical Properties table, Tensile Strength
  - benchmark: elongation
    label: Elongation A50, O/H111 (datasheet)
    value: 23
    unit: '%'
    scope: material
    conditions:
      temper: O/H111 (the datasheet says its values are for O/H111)
      gauge_length: 50 mm
      basis: printed without a minimum or typical marking
    method: Value in a mechanical-properties table of a supplier datasheet
    status: ground
    source: smith-5083-datasheet
    where: Mechanical Properties table, Elongation A50 mm
  - benchmark: shear_strength
    label: Shear strength, O/H111 (datasheet)
    value: 175
    unit: MPa
    scope: material
    conditions:
      temper: O/H111 (the datasheet says its values are for O/H111)
      basis: printed without a minimum or typical marking
    method: Value in a mechanical-properties table of a supplier datasheet; the name is not in the property list
    status: ground
    source: smith-5083-datasheet
    where: Mechanical Properties table, Shear Strength
  - benchmark: hardness_vickers
    label: Vickers hardness, O/H111 (datasheet)
    value: 75
    unit: HV
    scope: material
    conditions:
      temper: O/H111 (the datasheet says its values are for O/H111)
    method: Value in a mechanical-properties table of a supplier datasheet; the name is not in the property list
    status: ground
    source: smith-5083-datasheet
    where: Mechanical Properties table, Hardness Vickers
  - benchmark: yield_strength
    label: Proof stress, minimum, H32 sheet 0.2 to 6.00 mm
    value: 215
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: H32 (described on the same page as quarter hard)
      product_form: sheet, 0.2 to 6.00 mm
      standard: BS EN 485-2:2008, as printed
      offset: not printed
    method: Minimum value in a mechanical-properties table on a web article that quotes supplier data
    status: ground
    source: azom-aalco-5083
    where: Table 2 (d), row Proof Stress
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, H32 sheet 0.2 to 6.00 mm
    value: 305
    value_high: 380
    bound: range
    unit: MPa
    scope: material
    conditions:
      temper: H32
      product_form: sheet, 0.2 to 6.00 mm
      standard: BS EN 485-2:2008, as printed
    method: Range in a mechanical-properties table on a web article that quotes supplier data
    status: ground
    source: azom-aalco-5083
    where: Table 2 (d), row Tensile Strength
  - benchmark: hardness_brinell
    label: Brinell hardness, H32 sheet 0.2 to 6.00 mm
    value: 89
    unit: HB
    scope: material
    conditions:
      temper: H32
      product_form: sheet, 0.2 to 6.00 mm
    method: Value in a mechanical-properties table on a web article that quotes supplier data
    status: ground
    source: azom-aalco-5083
    where: Table 2 (d), row Hardness Brinell
  - benchmark: yield_strength
    label: Proof stress, minimum, H116 sheet and plate
    value: 195
    bound: lower
    unit: MPa
    scope: material
    conditions:
      temper: H116
      product_form: sheet and plate with DNV class certification, as offered by the supplier
      offset: not printed
      basis: minimum value printed on the datasheet
      unit_in_source: Mpa
    method: Minimum value printed on a supplier datasheet
    status: ground
    source: dinco-5083h116
    where: Mechanical Properties table, Proof Stress (195 Min)
  - benchmark: ultimate_tensile_strength
    label: Tensile strength, H116 sheet and plate
    value: 305
    value_high: 385
    bound: range
    unit: MPa
    scope: material
    conditions:
      temper: H116
      product_form: sheet and plate, as offered by the supplier
      unit_in_source: Mpa
    method: Range printed on a supplier datasheet
    status: ground
    source: dinco-5083h116
    where: Mechanical Properties table, Tensile Strength
  - benchmark: elongation
    label: Elongation at 50 mm, H116 (minimum)
    value: 8
    bound: lower
    unit: '%'
    scope: material
    conditions:
      temper: H116
      gauge_length: 50 mm
      basis: minimum value printed on the datasheet
    method: Minimum value printed on a supplier datasheet
    status: ground
    source: dinco-5083h116
    where: Mechanical Properties table, Elongation at 50 mm (8 Min)
  - benchmark: hardness_brinell
    label: Brinell hardness, H116
    value: 81
    unit: HB
    scope: material
    conditions:
      temper: H116
    method: Value printed on a supplier datasheet
    status: ground
    source: dinco-5083h116
    where: Mechanical Properties table, Hardness Brinell
  - benchmark: density
    label: Density, printed as 2.65 g/cm³
    value: 2.65
    unit: g/cm3
    scope: material
    conditions:
      temper: not stated
      temperature: not stated
    method: Value in the physical-properties table of a supplier datasheet for 5083
    status: ground
    source: smith-5083-datasheet
    where: Physical Properties table, Density (2.65 g/cm³)
  - benchmark: melting_point
    label: Melting point (one value printed)
    value: 570
    unit: °C
    scope: material
    conditions:
      temper: not stated
      basis: one value printed; solidus and liquidus not printed
    method: Value in the physical-properties table of a supplier datasheet for 5083
    status: ground
    note: The datasheet prints one value, not a melting range.
    source: smith-5083-datasheet
    where: Physical Properties table, Melting Point
  - benchmark: cte
    label: Thermal expansion coefficient
    value: 25
    unit: ppm/K
    scope: material
    conditions:
      temper: not stated
      temperature_range: not stated
      unit_in_source: x10-6 /K, equal to ppm/K
    method: Value in the physical-properties table of a supplier datasheet for 5083; printed as 10-6/K and written here as ppm/K (same unit)
    status: ground
    source: smith-5083-datasheet
    where: Physical Properties table, Thermal Expansion
  - benchmark: elastic_modulus
    label: Modulus of elasticity
    value: 72
    unit: GPa
    scope: material
    conditions:
      temper: not stated
      temperature: not stated
    method: Value in the physical-properties table of a supplier datasheet for 5083
    status: ground
    source: smith-5083-datasheet
    where: Physical Properties table, Modulus of Elasticity
  - benchmark: thermal_conductivity
    label: Thermal conductivity
    value: 121
    unit: W/(m·K)
    scope: material
    conditions:
      temper: not stated
      temperature: not stated
      unit_in_source: W/m.K
    method: Value in the physical-properties table of a supplier datasheet for 5083; printed as W/m.K and written here as W/(m·K) (same unit)
    status: ground
    source: smith-5083-datasheet
    where: Physical Properties table, Thermal Conductivity
  - benchmark: electrical_resistivity
    label: Electrical resistivity
    value: 0.058
    unit: µΩ·m
    scope: material
    conditions:
      temper: not stated
      temperature: not stated
      unit_in_source: 0.058 x 10-6 Ω.m
    method: Value in the physical-properties table of the H116 datasheet for 5083; printed as 0.058 x 10-6 Ω.m and written here as 0.058 µΩ·m (the 10-6 factor is the µ prefix)
    status: ground
    note: AZoM prints 0.58 x 10-6 Ω.m for the same property, ten times this value. That printed value is not recorded here.
    source: dinco-5083h116
    where: Physical properties table, Electrical Resistivity
corrosion:
  - environment: Sea water and industrial chemicals
    headline: Highly resistant to attack by seawater and industrial chemicals (supplier sheets).
    effect: The Dinco sheet says the alloy is highly resistant to attack by both seawater and industrial chemical environments. Smith Metal and AZoM give the same description. No exposure time, test method or corrosion rate is printed in the sources read.
    rating: low
    conditions:
      basis: general statements on supplier sheets; no exposure test data printed
    source: dinco-5083h116
    where: Description paragraph
  - environment: Service above 65 °C
    headline: Suppliers advise against use above 65 °C.
    effect: The Dinco sheet says the alloy is not recommended for use in temperatures in excess of 65 °C. Smith Metal says it is not recommended above 65 °C, and AZoM repeats the limit. None of the sources read names sensitisation or intergranular attack as the reason.
    rating: unknown
    conditions:
      temperature_limit: 65 °C (as printed)
    source: dinco-5083h116
    where: Description paragraph
risks:
  hazards:
    - text: PubChem's aggregated GHS reports for aluminium metal (4,079 reports from companies, 35 notifications) give 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). These are element-level statements, not a classification of the alloy.
      ghs:
        - H261
        - H228
        - H250
      source: pubchem-al
      where: Safety and Hazards, GHS Classification (CID 5359268)
    - text: PubChem's aggregated GHS reports for magnesium metal (2,205 reports from companies, 27 notifications) give H228 in 44.9%, H261 in 44.8%, H260 in 36.7%, H250 in 36.5% and H252 in 18%. These are element-level statements, not a classification of the alloy.
      ghs:
        - H228
        - H261
        - H260
        - H250
        - H252
      source: pubchem-mg
      where: Safety and Hazards, GHS Classification (CID 5462224)
    - text: PubChem's aggregated GHS reports for manganese (3,101 reports from companies, 22 notifications) give H319 in 14.8%, H228 in 11.6%, H411 in 10.9% and H412 in 10.8%. Other notifications list H360 and H372 without a percentage. These are element-level statements, not a classification of the alloy.
      ghs:
        - H319
        - H228
        - H411
        - H412
        - H360
        - H372
      source: pubchem-mn
      where: Safety and Hazards, GHS Classification (CID 23930)
  failure_risks:
    - mode: Use above 65 °C
      trigger: Service temperature above 65 °C
      consequence: The suppliers say not to use the alloy above 65 °C. The sources read do not say what happens above that limit.
      source: dinco-5083h116
      where: Description paragraph
    - mode: Lower elongation after long exposure to liquid nitrogen
      trigger: Holding the alloy in liquid nitrogen for longer times (laboratory test, 2007)
      consequence: The abstract says the elongation of Al 5083 at cryogenic temperature decreased with longer immersion, because of non-uniform fracture of precipitates on grain boundaries. The same abstract says Al 6061 kept its elongation regardless of immersion time.
      source: koreascience-2007
      where: Abstract
  side_effects: []
  handling:
    - text: 'Weldability as rated on the Dinco sheet: gas welding average, arc welding excellent, resistance welding excellent, brazing poor.'
      source: dinco-5083h116
      where: Weldability and Brazability entries
    - text: AZoM's fabrication table rates weldability gas average, arc excellent and resistance excellent; brazability and solderability poor; machinability poor; cold workability average.
      source: azom-aalco-5083
      where: Table 4, Fabrication response
    - text: AZoM recommends filler 5183 for welding 5083 to itself or to another alloy of the same sub-group; 5356 and 5556 are other suitable fillers.
      source: azom-aalco-5083
      where: Fabrication of Aluminium Alloy 5083, Welding
    - text: Smith Metal's datasheet says 5083 retains exceptional strength after welding.
      source: smith-5083-datasheet
      where: Weldability section
    - text: Smith Metal's product page says the alloy combines excellent ductility with good formability and performs well in low-temperature service.
      source: smith-5083-page
      where: Product description, Good Weldability section
    - text: Machinability is rated poor on the Dinco sheet and in AZoM's Table 4.
      source: dinco-5083h116
      where: Fabrication entry, Machinability
  mitigations:
    - text: Keep service at or below 65 °C, the limit printed by the suppliers.
      source: dinco-5083h116
      where: Description paragraph
uses:
  - application: structures
    device: Ships and other marine structures
    example: The Dinco sheet lists ship building and marine applications; Smith Metal and AZoM list shipbuilding.
    source: dinco-5083h116
    where: Applications list
  - application: propulsion-and-tanks
    device: Pressure vessels
    example: Listed as a typical use by the Dinco sheet, Smith Metal and AZoM.
    source: dinco-5083h116
    where: Applications list
  - application: structures
    device: Rail cars, vehicle bodies, tipper truck bodies and mine skips and cages
    example: Smith Metal and AZoM list rail cars, vehicle bodies and tipper or tip truck bodies, and mine skips and cages.
    source: smith-5083-datasheet
    where: Applications list
  - application: cryogenic-fuel
    device: Hydrogen storage tank for an automobile, tested in liquid nitrogen (laboratory study, not a product record)
    example: The 2007 study's abstract says the aluminium alloys it tested, including Al 5083, are used for hydrogen storage tanks of automobiles at cryogenic temperature.
    source: koreascience-2007
    where: Abstract
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: USGS 2025 List of Critical Minerals (listed as Aluminum)
        listed: true
      - list: EU list of 34 critical raw materials (the EC page says aluminium and bauxite have been merged)
        listed: true
    recycling: 'USGS: in 2025 about 3.6 million tons of aluminum was recovered from purchased scrap in the United States.'
    substitutes:
      - 'USGS: composites, magnesium, steel and titanium can substitute for aluminum in ground transportation uses.'
    source: usgs-mcs2026-aluminum
    where: 'World Smelter Production table, 2025e (world total 74,000 thousand t; shares calculated here from the printed tonnes); Recycling; Substitutes. Lists: see sources usgs-crit2025 and ec-crm'
  - subject: Bauxite (aluminium ore)
    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: EU list of 34 critical raw materials (Bauxite listed)
        listed: true
    recycling: 'USGS bauxite and alumina chapter: ''None.'''
    substitutes:
      - 'USGS: bauxite is the only raw material used to produce alumina on a commercial scale in the United States; clay is technically feasible but not currently economically competitive.'
    source: usgs-mcs2026-bauxite-alumina
    where: 'World Alumina Refinery and Bauxite Mine Production table, bauxite 2025e (world total 440,000 thousand t; shares calculated here); Recycling; Substitutes. EU list: see source ec-crm'
  - subject: Alumina (aluminium oxide)
    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
    recycling: 'USGS bauxite and alumina chapter: ''None.'''
    substitutes:
      - 'USGS: other raw materials such as alunite, anorthosite, coal wastes and oil shales offer potential alumina sources.'
    source: usgs-mcs2026-bauxite-alumina
    where: World Alumina Refinery production table, alumina 2025e (world total 150,000 thousand t; shares calculated here); Recycling; Substitutes
  - subject: Magnesium (metal)
    producers:
      - country: China
        share_percent: 86.4
        year: 2025
      - country: Russia
        share_percent: 5.5
        year: 2025
      - country: Brazil
        share_percent: 1.8
        year: 2025
      - country: Israel
        share_percent: 1.8
        year: 2025
      - country: Turkey
        share_percent: 1.4
        year: 2025
    critical_lists:
      - list: USGS 2025 List of Critical Minerals (listed as Magnesium)
        listed: true
      - list: EU list of 34 critical raw 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 lower weight is an advantage, but its high cost is a disadvantage.'
    source: usgs-mcs2026-magnesium-metal
    where: 'World Primary Production table, smelter production 2025 (world total 1,100 thousand t; shares calculated here); Recycling; Substitutes. Lists: see sources usgs-crit2025 and ec-crm'
documents:
  - title: Aluminium Alloy AA-5083 H116 Data Sheet (Dinco Trading LLC, Dubai)
    type: datasheet
    url: https://www.dinco.ae/files/aluminium-alloy-5083H116-data-sheet.pdf
  - title: 5083 Aluminium Technical Datasheet (Smiths Metal Centres, UK; footer 2023)
    type: datasheet
    url: https://www.smithmetal.com/pdf/aluminium/5xxx/5083.pdf
    year: 2023
  - title: '5083 grade page (Alloys International): W.Nr 3.3547, EN AW-5083 / AlMg4.5Mn0.7 and specifications'
    type: datasheet
    url: https://alloysintl.com/inventory/aluminum-alloys/aluminum-5083/
  - title: 'NIST Cryogenic Material Properties: 5083 Aluminum (UNS A95083)'
    type: database
    url: https://trc.nist.gov/cryogenics/materials/5083%20Aluminum/5083Aluminum_rev.htm
  - title: An Extremely Low Temperature Properties of Wrought Aluminum Alloys (Kor. J. Mater. Res. 17(4), 2007; open PDF with English abstract and tables)
    type: paper
    url: https://koreascience.kr/article/JAKO200727542962161.pdf
    year: 2007
  - 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: 'PubChem: Aluminum, CID 5359268, GHS classification'
    type: database
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5359268
  - title: 'PubChem: Magnesium, CID 5462224, GHS classification'
    type: database
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5462224
  - title: 'PubChem: Manganese, CID 23930, GHS classification'
    type: database
    url: https://pubchem.ncbi.nlm.nih.gov/compound/23930
gaps:
  - 'H321, the stabilised marine plate temper named in the request: no readable source printed values for it, so no H321 rows are recorded.'
  - ASTM B209 and ASTM B928 are not printed by any source read in this run, so they are not recorded as designations.
  - 'Exfoliation corrosion and stress-corrosion cracking: no source read prints a rating or test result for 5083, so neither is recorded.'
  - The 65 °C caution is printed by three suppliers, but none of the sources read names sensitisation or intergranular attack as its cause.
  - 'Cryogenic strength and elongation: the 2007 Korean study gives 5083 results only as figures, so no numeric cryogenic values are recorded.'
  - 'Fatigue strength, fracture toughness, specific heat and Poisson''s ratio: not found in a readable source.'
  - 'Space environment (vacuum outgassing, atomic oxygen, radiation, thermal cycling, flight): no source for 5083 was found in this run, so no environment tags are set.'
  - The Dinco sheet, Smith Metal and AZoM print the same density, melting point, expansion, modulus and conductivity values, probably from one common supplier table, so they are not independent confirmations.
  - Melting point is one printed value (570 °C). The solidus and liquidus are not printed.
  - 'Electrical resistivity: AZoM prints 0.58 x 10-6 Ohm.m for the same property, ten times the Dinco value. The Dinco value (0.058 x 10-6 Ohm.m) is recorded and the AZoM value is not.'
  - Titanium and zinc limits differ. The Dinco sheet prints Ti 0.05 to 0.25 and Zn 0.00 to 0.10; Smith Metal, AZoM and the 2007 paper print Ti max 0.15 and Zn max 0.25, and the Smith Metal limits are recorded. The Smith Metal composition table also has a stray 0.15 in its minimum row under Ti, so only its maxima are used.
  - Hardness (Brinell and Vickers) and shear strength are not in the property list, so they are recorded as hardness_brinell, hardness_vickers and shear_strength.
  - GM41 (Smith Metal, AZoM) is not recorded because the designation list has no GM system. QQ-A-250/6 (Alloys International) is not recorded for the same reason, and AMS 200/4 could not be confirmed as a 5083 specification from another source. 'AlMg4.5Mn' and 'marine aluminium' are not designations.
  - Product form of AMS 4056 and MIL-A-46027 is not printed on the grade page.
  - Failure-risk severity is not printed in any source read, so no severity is assigned to the two failure risks.
  - No safety data sheet for 5083 was read. The hazard entries are PubChem element-level data for aluminium, magnesium and manganese; dust and fume from cutting or welding are not recorded.
  - Crustal abundance of aluminium, magnesium and manganese was not looked up in this run.
  - No image was fetched in this run, so the profile has no media entry.
  - 'Not reached: MatWeb (asm.matweb.com) gave no response; the Clinton Aluminum cryogenic page gave no response; eFunda gave a server error; MakeItFrom returned a JavaScript and cookie check, which was not read.'
  - EN AW-5083 and 3.3547 come from one supplier page (Alloys International). No second source printing them was read.
  - Web search was unavailable in this run (its budget was used up). A follow-up search could find H321 data and the ASTM specifications.
sources:
  dinco-5083h116:
    title: Aluminium Alloy AA-5083 H116 Data Sheet (Dinco Trading LLC, Dubai)
    url: https://www.dinco.ae/files/aluminium-alloy-5083H116-data-sheet.pdf
    kind: datasheet
    license: supplier datasheet, cited not reproduced
  smith-5083-datasheet:
    title: 5083 Aluminium Technical Datasheet (Smiths Metal Centres, UK; footer 2023)
    url: https://www.smithmetal.com/pdf/aluminium/5xxx/5083.pdf
    year: 2023
    kind: datasheet
    license: supplier datasheet, cited not reproduced
  smith-5083-page:
    title: 5083 Aluminium product page (Smiths Metal Centres, UK)
    url: https://www.smithmetal.com/5083.htm
    kind: web
    license: supplier web page, cited not reproduced
  azom-aalco-5083:
    title: 'Aluminium 5083: Properties, Fabrication and Applications (AZoM article 2804; text sourced from Aalco)'
    id: AZoM ArticleID 2804; page dated 2005, cited as 2020
    url: https://www.azom.com/article.aspx?ArticleID=2804
    year: 2020
    kind: web
    license: web article, cited not reproduced
  alloysintl-5083:
    title: '5083 grade page (Alloys International, Ronkonkoma NY): W.Nr, EN designation and specifications'
    url: https://alloysintl.com/inventory/aluminum-alloys/aluminum-5083/
    kind: datasheet
    license: supplier web page, cited not reproduced
  nist-5083:
    title: 'Material Properties: 5083 Aluminum (UNS A95083), NIST Cryogenic Material Properties'
    url: https://trc.nist.gov/cryogenics/materials/5083%20Aluminum/5083Aluminum_rev.htm
    kind: database
    license: NIST public web page
  koreascience-2007:
    title: An Extremely Low Temperature Properties of Wrought Aluminum Alloys (Kor. J. Mater. Res. 17(4), 2007)
    id: Kor. J. Mater. Res. Vol. 17, No. 4 (2007)
    url: https://koreascience.kr/article/JAKO200727542962161.pdf
    year: 2007
    kind: paper
    license: open PDF on KoreaScience, cited not reproduced
  pubchem-al:
    title: 'Aluminum, PubChem CID 5359268: Safety and Hazards, GHS Classification'
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5359268
    kind: database
    license: PubChem (NCBI) public data
  pubchem-mg:
    title: 'Magnesium, PubChem CID 5462224: Safety and Hazards, GHS Classification'
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5462224
    kind: database
    license: PubChem (NCBI) public data
  pubchem-mn:
    title: 'Manganese, PubChem CID 23930: Safety and Hazards, GHS Classification'
    url: https://pubchem.ncbi.nlm.nih.gov/compound/23930
    kind: database
    license: PubChem (NCBI) public data
  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-alumina:
    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-metal:
    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-crit2025:
    title: About the 2025 List of Critical Minerals (USGS; the final list, posted in the Federal Register)
    url: https://www.usgs.gov/programs/mineral-resources-program/science/about-2025-list-critical-minerals
    year: 2025
    kind: web
    license: public domain (USGS)
  ec-crm:
    title: Critical raw materials (European Commission; fifth list of 34 critical raw materials, 2023)
    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
license: CC-BY-4.0
updated: '2026-10-24'
review:
  status: draft
  method: assistant
  checked_values: 22
  unreachable: 0
  caveats: 4
  note: Written 2026-10-24 by an AI assistant from pages fetched in this run. Web search was unavailable (its budget was used up), so pages were fetched directly or by links found on fetched pages. MakeItFrom returned a JavaScript and cookie check and was not read. The O and H111 values are printed together by the sources. The AZoM electrical resistivity (0.58 x 10-6 Ohm.m) differs from the Dinco value recorded (0.058 x 10-6 Ohm.m).
story:
  recipe:
    line: 5083 is a wrought aluminium-magnesium alloy. The Smith Metal datasheet gives magnesium at 4.00 to 4.90 wt% and manganese at 0.40 to 1.00 wt% as the main additions, with chromium at 0.05 to 0.25 wt% and small maximum limits for iron, silicon, copper, zinc and titanium. Aluminium is the balance. The Dinco sheet places the alloy among the non-heat-treatable alloys.
    parts:
      - name: Aluminium
        symbol: Al
        share_note: balance (the rest)
        role: The matrix of the alloy; the balance after the alloying limits.
        source: smith-5083-datasheet
        where: Chemical Composition (weight %) table, Al Bal
      - name: Magnesium
        symbol: Mg
        share_percent: 4
        share_high: 4.9
        role: Main alloying element, printed range 4.00 to 4.90 wt%.
        source: smith-5083-datasheet
        where: Chemical Composition (weight %) table, Mg min and max
      - name: Manganese
        symbol: Mn
        share_percent: 0.4
        share_high: 1
        role: Alloying addition inside the printed range; the sources read do not describe its function.
        source: smith-5083-datasheet
        where: Chemical Composition (weight %) table, Mn min and max
      - name: Chromium
        symbol: Cr
        share_percent: 0.05
        share_high: 0.25
        role: Minor addition inside the printed range; the sources read do not describe its function.
        source: smith-5083-datasheet
        where: Chemical Composition (weight %) table, Cr min and max
      - name: Iron
        symbol: Fe
        share_note: max 0.40
        role: Limited to the printed maximum.
        source: smith-5083-datasheet
        where: Chemical Composition (weight %) table, Fe max
      - name: Silicon
        symbol: Si
        share_note: max 0.40
        role: Limited to the printed maximum.
        source: smith-5083-datasheet
        where: Chemical Composition (weight %) table, Si max
      - name: Copper
        symbol: Cu
        share_note: max 0.10
        role: Limited to the printed maximum.
        source: smith-5083-datasheet
        where: Chemical Composition (weight %) table, Cu max
      - name: Zinc
        symbol: Zn
        share_note: max 0.25
        role: Limited to the printed maximum.
        source: smith-5083-datasheet
        where: Chemical Composition (weight %) table, Zn max
      - name: Titanium
        symbol: Ti
        share_note: max 0.15
        role: Limited to the printed maximum (the Dinco sheet prints 0.05 to 0.25).
        source: smith-5083-datasheet
        where: Chemical Composition (weight %) table, Ti max
  risk_groups:
    - title: For people
      lead: No safety data sheet for the alloy was read in this run. The hazard entries are PubChem's element-level data for aluminium, magnesium and manganese.
      gap: Hazard classification for 5083 as supplied, and for dust or fume from cutting or welding, was not found in a source read in this run.
      points:
        - label: What the sources cover
          line: The sources read describe the metals' flammability and water reactivity as classified in PubChem's company reports, and the suppliers' corrosion and welding behaviour. They do not describe health effects of the alloy.
    - title: If it fails
      lead: These are the failure routes named in the sources. They are supplier statements and laboratory results, not field incident data.
      points:
        - label: Use above 65 °C
          line: The suppliers say not to use the alloy above 65 °C. The sources read do not say what happens above that limit.
        - label: Long exposure to liquid nitrogen
          line: In a 2007 laboratory study, the elongation of Al 5083 at cryogenic temperature fell with longer immersion in liquid nitrogen. The abstract attributes this to non-uniform fracture of precipitates on grain boundaries.
    - title: Handling and welding
      points:
        - label: Welding
          line: Arc and resistance welding are rated excellent and gas welding average. Brazing is rated poor. AZoM recommends filler 5183 for welding 5083 to itself.
        - label: Machining
          line: Machinability is rated poor, and cold workability average.
  why: 5083 is an aluminium-magnesium alloy sold for marine and pressure-vessel work. Magnesium, at 4.00 to 4.90 wt%, is the main addition. The Dinco sheet says the alloy has the highest strength of the non-heat-treatable aluminium alloys, is highly resistant to attack by seawater and industrial chemicals, and keeps its strength after welding. The suppliers list shipbuilding, pressure vessels, vehicle bodies and rail cars as typical uses, and they advise against use above 65 °C.
  uses:
    - where: Ships and marine structures
      line: The Dinco sheet, Smith Metal and AZoM all list shipbuilding. The Dinco sheet also lists marine applications and drilling rigs.
    - where: Pressure vessels
      line: All three supplier pages list pressure vessels as a typical use.
    - where: Vehicle bodies, rail cars and mine skips
      line: Smith Metal and AZoM list rail cars, vehicle bodies and tipper truck bodies, and both also list mine skips and cages.
    - where: Research on cryogenic hydrogen tanks
      line: A 2007 Korean laboratory study tested aluminium alloys, including Al 5083, for automobile hydrogen storage tanks in liquid nitrogen. It is a laboratory study, not a product record.
  can_do:
    - label: Strength by temper
      value: Minimum proof stress 125 to 215 MPa
      line: Minimum proof stress is 125 MPa for O/H111 sheet and 215 MPa for H32 sheet (BS EN 485-2 values on AZoM), and 195 MPa for H116 sheet and plate (Dinco). Tensile ranges printed are 275 to 350 MPa for O/H111 sheet, 305 to 380 MPa for H32 sheet and 305 to 385 MPa for H116.
    - label: Weight
      benchmark: density
      line: Density is 2.65 g/cm3, as printed by Smith Metal and Dinco.
    - label: Stiffness
      benchmark: elastic_modulus
      line: Modulus of elasticity is 72 GPa (Smith Metal).
    - label: Heat conduction
      benchmark: thermal_conductivity
      line: Thermal conductivity is 121 W/(m·K) (Smith Metal).
    - label: Welding
      value: Arc and resistance welding rated excellent
      line: Arc and resistance welding are rated excellent and gas welding average. The alloy keeps its strength after welding (Dinco, Smith Metal, AZoM).
    - label: Seawater
      value: Highly resistant
      line: The suppliers rate the alloy highly resistant to attack by seawater and industrial chemicals (Dinco, Smith Metal, AZoM).
  compare: 5083 is a strong, weldable, seawater-resistant option for marine structures kept at or below 65 °C. The record holds no like-for-like figures for other alloys or for space use, so this profile does not rank it against other materials.
  compare_rows:
    - label: Density
      benchmark: density
    - label: Yield strength
      benchmark: yield_strength
    - label: Thermal conductivity
      benchmark: thermal_conductivity
  handling:
    - Weld 5083 to itself with filler 5183 (AZoM). Arc and resistance welding are rated excellent.
    - Keep service at or below 65 °C, the limit the suppliers print.
    - Machinability is rated poor (Dinco and AZoM).
  good_for:
    - Marine structures and ships, where the suppliers cite seawater resistance and good weldability (Dinco, Smith Metal, AZoM).
    - Pressure vessels kept at or below 65 °C (Dinco, Smith Metal, AZoM).
    - Rail cars and vehicle bodies, which the suppliers list as typical uses (Smith Metal, AZoM).
    - 'Low-temperature service: the Smith Metal product page says the alloy performs well at low temperature. No numbers are printed.'
  watch_out:
    - Service above 65 °C. The suppliers say not to use the alloy there.
    - Long exposure to liquid nitrogen lowered the elongation of 5083 in a 2007 laboratory study.
    - Strength values come from supplier and distributor pages for O/H111, H32 and H116, and some are minimum values. H321 values, ASTM designations and space data were not found.
  verdict: 5083 is a weldable marine aluminium alloy with supplier-rated seawater resistance and a 65 °C service limit. The record leaves out the H321 marine temper, the ASTM designations, exfoliation data and any space-environment data.