Aluminium alloy 7075-T6 7075-T6

spore: profile
id: aluminium-7075
spore_version: 0.2
family: aluminium-alloys
name: Aluminium alloy 7075-T6
abbreviation: 7075-T6
role: high-strength wrought structural alloy
category: metals
type: aluminium
summary: Aluminium 7075 is a heat-treatable Al-Zn-Mg-Cu alloy. This profile focuses on T6, for which the Kaiser tube and pipe datasheet reports typical yield strength of 503 MPa and tensile strength of 572 MPa on a 0.500 inch diameter specimen. NASA describes 7075 as an alloy used in launch vehicles and spacecraft, while its handbook warns that T6 is susceptible to stress-corrosion cracking in the short transverse direction.
best_for: High-strength aluminium parts where low mass and wrought forms such as tube, plate, bar or forging are useful
weakest_at: Stress-corrosion cracking in the short-transverse direction in T6, and relatively poor corrosion resistance in industrial and marine environments
identity:
  formula: 'Wrought Al-Zn-Mg-Cu-Cr alloy; nominal composition by weight: Al balance, Zn 5.6%, Mg 2.5%, Cu 1.6%, Cr 0.3%'
  source: nasa-7075
  where: Tabular Abstract, Nominal Composition; Chapter 3, section 3.11
  designations:
    - system: UNS
      code: A97075
      source: titanium-com-7075
      where: Product heading, Aluminum Alloy 7075 UNS# A97075
    - system: AA
      code: '7075'
      source: dinco-7075
      where: Heading, SIZES RANGE FOR AA 7075
    - system: ISO
      code: AlZn5.5MgCu
      source: quickparts-7075
      where: Key Words line
    - system: ASTM
      code: B209
      note: plate
      source: nasa-7075
      where: Table 2.2, sheet and plate row, ASTM column (B209-71)
    - system: ASTM
      code: B210
      note: cold drawn
      source: kaiser-7075-tube-pipe
      where: Applicable Specifications, Cold Drawn column
    - system: ASTM
      code: B211
      note: bar
      source: nasa-7075
      where: Table 2.2, bar rod wire shapes rolled or drawn row, ASTM column (B211-71)
    - system: ASTM
      code: B221
      note: extrusion
      source: kaiser-7075-tube-pipe
      where: Applicable Specifications, Extruded column
    - system: ASTM
      code: B241
      note: extrusion
      source: kaiser-7075-tube-pipe
      where: Applicable Specifications, Extruded column
    - system: AMS
      code: WW-T-700/7
      note: drawn seamless tube
      source: aerocom-7075
      where: Specification table, AMS-WWT-700/7 row
    - system: AMS
      code: QQ-A-200/11
      note: extrusion
      source: aerocom-7075
      where: Specification table, AMS-QQ-A-200/11 row
    - system: AMS
      code: QQ-A-200/15
      note: extrusion
      source: aerocom-7075
      where: Specification table, AMS-QQ-A-200/15 row
    - system: AMS
      code: QQ-A-225/9
      note: bar, rod, wire and shapes
      source: aerocom-7075
      where: Specification table, AMS-QQ-A-225/9 row
    - system: AMS
      code: QQ-A-250/12
      note: sheet and plate
      source: aerocom-7075
      where: Specification table, AMS-QQ-A-250/12 row
    - system: AMS
      code: '4038'
      note: sheet and plate
      source: nasa-7075
      where: Table 2.2, sheet and plate row, AMS column (4038C)
    - system: AMS
      code: '4044'
      note: sheet and plate
      source: nasa-7075
      where: Table 2.2, sheet and plate row, AMS column (4044D)
    - system: AMS
      code: '4045'
      note: sheet and plate
      source: aerocom-7075
      where: Specification table, AMS4045 row
    - system: AMS
      code: '4078'
      note: sheet and plate
      source: aerocom-7075
      where: Specification table, AMS4078 row
    - system: AMS
      code: '4122'
      note: bar
      source: nasa-7075
      where: Table 2.2, rolled or drawn bar row, AMS column (4122E)
    - system: AMS
      code: '4123'
      note: bar and rod
      source: aerocom-7075
      where: Specification table, AMS4123 row
    - system: AMS
      code: '4124'
      note: bar, rod and wire
      source: aerocom-7075
      where: Specification table, AMS4124 row
    - system: AMS
      code: '4154'
      note: extrusion
      source: aerocom-7075
      where: Specification table, AMS4154 row
    - system: AMS
      code: '4168'
      note: extrusion
      source: nasa-7075
      where: Table 2.2, extruded row, AMS column (4168C)
    - system: AMS
      code: '4169'
      note: extrusion
      source: aerocom-7075
      where: Specification table, AMS4169 row
tags:
  environments:
    - launch
    - low-earth-orbit
  stresses:
    - stress-corrosion-cracking
    - thermal-cycling
  applications:
    - structures
    - propulsion-and-tanks
    - mechanisms
properties:
  - benchmark: ultimate_tensile_strength
    label: Typical tensile strength, T6 tube and pipe
    value: 572
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: tube and pipe
      specimen: 0.500 inch diameter tensile specimen
      basis: typical mechanical property
    method: Value printed in the Kaiser tube and pipe technical data table
    status: ground
    source: kaiser-7075-tube-pipe
    where: Typical Mechanical Properties table, T6 row, Ultimate (MPa)
  - benchmark: yield_strength
    label: Typical tensile yield strength, T6 tube and pipe
    value: 503
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: tube and pipe
      specimen: 0.500 inch diameter tensile specimen
      basis: typical mechanical property
    method: Value printed in the Kaiser tube and pipe technical data table
    status: ground
    source: kaiser-7075-tube-pipe
    where: Typical Mechanical Properties table, T6 row, Yield (MPa)
  - benchmark: elongation
    label: Elongation, T6 tube and pipe
    value: 11
    unit: '%'
    scope: material
    conditions:
      temper: T6
      product_form: tube and pipe
      specimen: 0.500 inch diameter tensile specimen; elongation over 4D
      basis: typical mechanical property
    method: Value printed in the Kaiser tube and pipe technical data table
    status: ground
    source: kaiser-7075-tube-pipe
    where: Typical Mechanical Properties table, T6 row, Elongation/4D
  - benchmark: elastic_modulus
    label: Modulus of elasticity, T6 tube and pipe
    value: 71
    unit: GPa
    scope: material
    conditions:
      temper: T6
      product_form: tube and pipe
      basis: typical mechanical property
    method: Metric value printed in the Kaiser tube and pipe technical data table
    status: ground
    source: kaiser-7075-tube-pipe
    where: Typical Mechanical Properties table, T6 row, Modulus of Elasticity (GPa)
  - benchmark: fatigue_strength
    label: Endurance limit, T6 tube and pipe
    value: 158
    unit: MPa
    scope: material
    conditions:
      temper: T6
      product_form: tube and pipe
      loading: reversed stress, R.R. Moore type
      cycles: 5 x 10E8 cycles
      basis: typical mechanical property
    method: Value printed in the Kaiser tube and pipe technical data table; the footnote states the reversed-stress cycle count
    status: ground
    source: kaiser-7075-tube-pipe
    where: Typical Mechanical Properties table, T6 row, Fatigue Endurance Limit (MPa) and footnote
  - benchmark: density
    label: Nominal density
    value: 2.8
    unit: Mg/m3
    scope: material
    conditions:
      temperature: 20 °C
      basis: nominal density for 7075 tube and pipe alloy
      value_in_source: '2.80'
    method: Value printed in the Kaiser tube and pipe technical data table
    status: ground
    source: kaiser-7075-tube-pipe
    where: Typical Physical Properties table, Nominal Density (68 °F/20 °C)
  - benchmark: melting_point
    label: Melting range
    value: 532
    value_high: 635
    unit: °C
    scope: material
    conditions:
      product_form: tube and pipe alloy
      basis: melting range as printed
    method: Values printed in the Kaiser tube and pipe technical data table
    status: ground
    source: kaiser-7075-tube-pipe
    where: Typical Physical Properties table, Melting Range
  - benchmark: specific_heat
    label: Specific heat at 100 °C
    value: 960
    unit: J/kg·K
    scope: material
    conditions:
      temperature: 100 °C
      product_form: tube and pipe alloy
    method: Metric value printed in the Kaiser tube and pipe technical data table
    status: ground
    source: kaiser-7075-tube-pipe
    where: Typical Physical Properties table, Specific Heat (212 °F/100 °C)
  - benchmark: cte
    label: Linear coefficient of thermal expansion, 20 to 100 °C
    value: 23.4
    unit: µm/m·K
    scope: material
    conditions:
      temperature_range: 20 °C to 100 °C
      product_form: tube and pipe alloy
      basis: linear expansion
    method: Metric value printed in the Kaiser tube and pipe technical data table
    status: ground
    source: kaiser-7075-tube-pipe
    where: Typical Physical Properties table, Coefficient of Thermal Expansion, Linear
  - benchmark: thermal_conductivity
    label: Thermal conductivity, T6 at 20 °C
    value: 130
    unit: W/m·K
    scope: material
    conditions:
      temperature: 20 °C
      temper: T6
      product_form: tube and pipe alloy
    method: Metric value printed in the Kaiser tube and pipe technical data table
    status: ground
    source: kaiser-7075-tube-pipe
    where: Typical Physical Properties table, Thermal Conductivity (68 °F/20 °C), T6/T651 row
  - benchmark: specific_heat
    label: Specific heat at 100 °C, handbook value
    value: 0.23
    unit: cal/g·°C
    scope: material
    conditions:
      temperature: 100 °C
      temper: not stated
      product_form: not stated in the tabular abstract
    method: Value printed in the NASA handbook tabular abstract; this separate value is retained in the source unit
    status: ground
    source: nasa-7075
    where: Tabular Abstract, Typical Physical Properties, Specific Heat
  - benchmark: electrical_resistivity
    label: Electrical resistivity, T6
    value: 5.2
    unit: µΩ·cm
    scope: material
    conditions:
      temperature: 20 °C
      temper: T6
      product_form: not stated in the tabular abstract
    method: Value printed in the NASA handbook tabular abstract
    status: ground
    source: nasa-7075
    where: Tabular Abstract, Typical Physical Properties, Electrical Resistivity
  - benchmark: poissons_ratio
    label: Poisson's ratio
    value: 0.33
    unit: '-'
    scope: material
    conditions:
      temper: not stated
      product_form: not stated
    method: Value printed in the NASA handbook section on Poisson's ratio
    status: ground
    source: nasa-7075
    where: Section 7.21, Poisson's ratio
  - benchmark: shear_modulus
    label: Design value of modulus of rigidity
    value: 3.9
    unit: 10^3 ksi
    scope: material
    conditions:
      temper: all products and tempers per handbook
      product_form: all products
      unit_in_source: ksi x 10^3
    method: Value printed in the NASA handbook; retained in the table's stated scale
    status: ground
    source: nasa-7075
    where: Section 7.24.1, Design value of modulus of rigidity
  - benchmark: elastic_modulus
    label: Typical Young's modulus
    value: 10.4
    unit: 10^3 ksi
    scope: material
    conditions:
      temper: not stated
      product_form: not stated
      unit_in_source: ksi x 10^3
    method: Typical value printed in the NASA handbook
    status: ground
    source: nasa-7075
    where: Section 7.22.2, Typical value of Young's modulus
  - benchmark: cte
    label: Mean coefficient of thermal expansion, 20 to 100 °C
    value: 23.6
    unit: ppm/°C
    scope: material
    conditions:
      temperature_range: 20 °C to 100 °C
      temper: not stated
      product_form: not stated in the tabular abstract
    method: Value printed in the NASA handbook tabular abstract; retained as a mean coefficient for its stated interval
    status: ground
    source: nasa-7075
    where: Tabular Abstract, Typical Physical Properties, Average Coefficient of Thermal Expansion
corrosion:
  - environment: Industrial and marine exposure
    headline: 7075 is attacked in industrial and marine environments; its T6 temper is susceptible to short-transverse stress-corrosion cracking.
    effect: The NASA handbook describes good corrosion resistance in rural atmospheres, but says 7075 is attacked by industrial and marine environments and is less resistant in most environments than other wrought aluminium alloys. It reports that T6 has high stress-corrosion resistance in longitudinal and long-transverse directions but is susceptible in the short-transverse direction.
    rating: moderate
    conditions:
      basis: qualitative handbook findings; no general corrosion rate given
      temper: T6
      stress_direction: short transverse direction is susceptible to stress-corrosion cracking
    source: nasa-7075
    where: Chapter 10, sections 10.1 and 10.2
  - environment: Stress with chloride exposure
    headline: The Kaiser sheet gives a lower stress-corrosion rating for T6 than for T73.
    effect: The datasheet explains that the ratings use service experience and laboratory tests, including 3.5% sodium chloride alternate immersion, and gives T6 a C rating and T73 a B rating.
    rating: moderate
    conditions:
      basis: relative rating, not a corrosion rate
      test_environment: 3.5% sodium chloride alternate immersion
      temper: T6
    source: kaiser-7075-tube-pipe
    where: Comparative Characteristics table and footnote 2
  - environment: Stress-corrosion cracking mechanism
    headline: A NASA Tech Brief proposes a two-phase anodic path model for cracking in 7075.
    effect: The abstract describes a model in which the continuous anodic path along which the metal is preferentially attacked consists of two phases that alternate as anodes.
    rating: unknown
    conditions:
      basis: qualitative proposed mechanism; no crack-growth rate recorded here
      material: 7075 aluminium alloy
    source: nasa-scc-7075
    where: Abstract
risks:
  hazards:
    - text: PubChem's aluminium metal record aggregates GHS classifications including flammable solid, spontaneous ignition in air, and flammable gas release on contact with water. This is component-level information and is not a classification of solid 7075 alloy.
      ghs:
        - H228
        - H250
        - H261
      source: pubchem-aluminium
      where: Safety and Hazards, GHS Classification (CID 5359268)
    - text: PubChem's magnesium metal record includes GHS statements for flammable solid and flammable gas release on contact with water. The record does not classify 7075 alloy.
      ghs:
        - H228
        - H260
      source: pubchem-magnesium
      where: Safety and Hazards, GHS Classification (CID 5462224)
    - text: PubChem's zinc metal record includes GHS statements for spontaneous ignition in air, flammable gas release on contact with water, and aquatic toxicity. These component-level data do not classify 7075 alloy.
      ghs:
        - H250
        - H260
        - H400
        - H410
      source: pubchem-zinc
      where: Safety and Hazards, GHS Classification (CID 23994)
    - text: PubChem's copper record includes GHS statements for aquatic toxicity; these component-level data do not classify 7075 alloy.
      ghs:
        - H400
        - H410
      source: pubchem-copper
      where: Safety and Hazards, GHS Classification (CID 23978)
  failure_risks:
    - mode: Stress-corrosion cracking
      trigger: Sustained tensile stress in a corrosive environment, particularly in the short-transverse direction of T6 product
      consequence: The NASA handbook identifies susceptibility of 7075-T6 in the short-transverse direction; it reports better resistance in T73.
      severity: high
      source: nasa-7075
      where: Chapter 10, section 10.2
    - mode: Corrosion in industrial or marine environments
      trigger: Exposure to marine spray or industrial atmosphere
      consequence: The handbook says 7075 is attacked in these environments and is generally less resistant than other wrought aluminium alloys.
      severity: moderate
      source: nasa-7075
      where: Chapter 10, section 10.2
  side_effects: []
  handling:
    - text: The sources do not provide a safety data sheet for 7075-T6 as supplied. Obtain the exact product's SDS before machining, grinding, welding or handling dust.
      source: pubchem-aluminium
      where: 'Gap: no 7075-T6 supplier SDS was read; PubChem component record is not an alloy SDS'
  mitigations:
    - text: The NASA handbook describes Alclad 7075 sheet and plate, with a 7072 cladding layer selected to provide corrosion protection to the 7075 core.
      source: nasa-7075
      where: Chapter 10, sections 10.2 and 10.3
uses:
  - application: structures
    device: Aircraft structures and airframe parts
    example: The NASA handbook lists aircraft structures as a typical 7075 application and describes engine nacelle covers and contoured wing-skin panels.
    source: nasa-7075
    where: Chapter 1, section 1.3; Chapter 5, section 5.211
  - application: mechanisms
    device: High-pressure hydraulic units
    example: The NASA handbook lists high-pressure hydraulic units among typical applications of 7075.
    source: nasa-7075
    where: Chapter 1, section 1.3
  - application: structures
    device: Launch vehicles and spacecraft
    example: The handbook says structural alloy 7075 has been used in launch vehicles and spacecraft and discusses its behaviour in the space environment.
    source: nasa-7075
    where: Chapter 6, section 6.1
supply:
  - subject: Aluminium (primary smelter production; supply context for the alloy's base metal)
    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: []
    recycling: USGS reports that about 3.6 million tons of aluminium were recovered from purchased scrap in the United States in 2025; about 56% was new scrap and 44% old scrap.
    substitutes:
      - USGS says composites can substitute for aluminium in aircraft fuselages and wings, and magnesium, steel or titanium can substitute in ground transportation.
    source: usgs-mcs2026-aluminium
    where: World Smelter Production and Capacity table, 2025e; producer shares calculated from printed country tonnages and world total of 74,000 thousand metric tons; Recycling; Substitutes
documents:
  - title: Kaiser Aluminum, Tube and Pipe Alloy 7075 Technical Data, revision 05/06
    type: datasheet
    url: https://online.kaiseraluminum.com/depot/PublicProductInformation/Document/1042/Kaiser_Aluminum_7075_Tube_and_Pipe.pdf
    year: 2006
  - title: Materials Data Handbook, Aluminum Alloy 7075, NASA CR-123768
    type: report
    url: https://ntrs.nasa.gov/api/citations/19720022809/downloads/19720022809.pdf?attachment=true
    year: 1972
  - title: The mechanism of stress-corrosion cracking in 7075 aluminum alloy, NASA Tech Brief MFS-18614
    type: report
    url: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19700000509.pdf
    year: 1970
  - title: USGS Mineral Commodity Summaries 2026, Aluminum
    type: report
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-aluminum.pdf
    year: 2026
  - title: PubChem Aluminum, CID 5359268, PUG View GHS classification
    type: database
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5359268
  - title: PubChem Magnesium, CID 5462224, PUG View GHS classification
    type: database
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5462224
  - title: PubChem Zinc, CID 23994, PUG View GHS classification
    type: database
    url: https://pubchem.ncbi.nlm.nih.gov/compound/23994
  - title: PubChem Copper, CID 23978, PUG View GHS classification
    type: database
    url: https://pubchem.ncbi.nlm.nih.gov/compound/23978
  - title: Titanium.com, Aluminum Alloy 7075 product page
    type: datasheet
    url: https://titanium.com/alloys/aluminum-alloys/aluminum-alloy-7075/
  - title: Dinco Trading, Aluminium Alloy 7075 data sheet
    type: datasheet
    url: https://www.dinco.ae/files/aluminium-alloy-7075-data-sheet.pdf
  - title: Quickparts, Aluminum 7075 datasheet, cites ASM MatWeb
    type: datasheet
    url: https://quickparts.com/wp-content/uploads/2024/05/Aluminum-7075.pdf
  - title: Aerocom Metals, Aluminium Alloy 7075 specification table
    type: datasheet
    url: https://aerocommetals.co.uk/featured-inventory/aluminium-alloy-7075/
gaps:
  - No atomic weights were added; recipe composition is given as weight percentages from the source.
  - No 7075-T6 supplier SDS was read. PubChem component records are not classifications for the finished alloy, and hazards for alloy dust or welding fume remain unknown here.
  - USGS supply data describe primary aluminium, not production or market shares for 7075 alloy or its zinc, magnesium, copper and chromium inputs.
  - The producer shares are calculated from USGS tonnages and the rounded world total, so they are approximate shares of primary aluminium production.
  - No critical-mineral-list status for the alloying elements was checked.
  - The numerical mechanical properties are typical tube and pipe data from Kaiser, not design allowables. NASA handbook properties do not state product form where noted.
  - No quantitative stress-corrosion crack-growth rate for 7075-T6 was recorded; corrosion statements here are qualitative ratings or directional susceptibility.
  - No 7075-T6-specific in-space flight exposure result was read; the NASA handbook statements describe aluminium alloys and the 7075 material family.
  - 'Designations not found in any page read in this run, so not added: EN AW-7075 and its chemical name, EN material number 3.4365, the DIN name, AFNOR A-Z5GU and JIS A7075.'
  - 'Not reached in this run: Aalco, Constellium, the Aluminum Association and ASM MatWeb (asm.matweb.com timed out). Xometry returned 403, and Alloys International, Suppliers Online and TW Metals returned no readable text.'
  - Clad 7075 specifications (AMS 4046, AMS 4047, AMS 4048, AMS 4049, QQ-A-250/13, QQ-A-250/18, MIL-A-8902) cover Alclad 7075, a different product, so they are not listed as designations of this alloy.
  - Forging, rivet and impact-extrusion specifications in NASA Table 2.2 (AMS 4139, AMS 4170, ASTM B247, ASTM B316, QQ-A-367, QQ-A-430, MIL-A-12545, MIL-A-22771) are not sheet, plate, bar or extrusion products and are not listed.
  - NASA Table 2.2 is specified as of May 1971, so its AMS and ASTM revision letters were not checked against current issues.
sources:
  kaiser-7075-tube-pipe:
    title: Kaiser Aluminum, Tube and Pipe Alloy 7075 Technical Data
    id: Revision 05/06
    url: https://online.kaiseraluminum.com/depot/PublicProductInformation/Document/1042/Kaiser_Aluminum_7075_Tube_and_Pipe.pdf
    year: 2006
    kind: datasheet
    license: Manufacturer datasheet (cited, not reproduced)
  nasa-7075:
    title: Materials Data Handbook, Aluminum Alloy 7075, NASA CR-123768
    id: NASA NTRS 19720022809, 1972
    url: https://ntrs.nasa.gov/api/citations/19720022809/downloads/19720022809.pdf?attachment=true
    year: 1972
    kind: handbook
    license: Public domain, U.S. Government work
  nasa-scc-7075:
    title: The mechanism of stress-corrosion cracking in 7075 aluminum alloy
    id: A. J. Jacobs, NASA Tech Brief MFS-18614, NASA NTRS 19700000509
    url: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19700000509.pdf
    year: 1970
    kind: report
    license: Public domain, U.S. Government work
  usgs-mcs2026-aluminium:
    title: Mineral Commodity Summaries 2026, Aluminum
    id: USGS, February 2026
    url: https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-aluminum.pdf
    year: 2026
    kind: report
    license: Public domain, U.S. Government work
  pubchem-aluminium:
    title: Aluminum, PubChem CID 5359268, PUG View GHS record
    id: PUG View JSON, read during this profile research
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5359268
    kind: database
    license: PubChem public data
  pubchem-magnesium:
    title: Magnesium, PubChem CID 5462224, PUG View GHS record
    id: PUG View JSON, read during this profile research
    url: https://pubchem.ncbi.nlm.nih.gov/compound/5462224
    kind: database
    license: PubChem public data
  pubchem-zinc:
    title: Zinc, PubChem CID 23994, PUG View GHS record
    id: PUG View JSON, read during this profile research
    url: https://pubchem.ncbi.nlm.nih.gov/compound/23994
    kind: database
    license: PubChem public data
  pubchem-copper:
    title: Copper, PubChem CID 23978, PUG View GHS record
    id: PUG View JSON, read during this profile research
    url: https://pubchem.ncbi.nlm.nih.gov/compound/23978
    kind: database
    license: PubChem public data
  titanium-com-7075:
    title: Aluminum Alloy 7075 product page, Titanium.com
    url: https://titanium.com/alloys/aluminum-alloys/aluminum-alloy-7075/
    kind: web
    license: Stockist web page (cited, not reproduced)
  dinco-7075:
    title: Aluminium Alloy 7075 data sheet, Dinco Trading
    url: https://www.dinco.ae/files/aluminium-alloy-7075-data-sheet.pdf
    kind: datasheet
    license: Stockist datasheet (cited, not reproduced)
  quickparts-7075:
    title: Aluminum 7075 datasheet, Quickparts, cites ASM MatWeb
    url: https://quickparts.com/wp-content/uploads/2024/05/Aluminum-7075.pdf
    kind: datasheet
    license: Manufacturer datasheet (cited, not reproduced)
  aerocom-7075:
    title: Aluminium Alloy 7075 specification table, Aerocom Metals
    url: https://aerocommetals.co.uk/featured-inventory/aluminium-alloy-7075/
    kind: web
    license: Stockist web page (cited, not reproduced)
license: CC-BY-4.0
updated: '2026-10-20'
review:
  status: draft
  method: assistant
  checked_values: 16
  unreachable: 0
  caveats: 5
  note: Values read from the Kaiser 7075 tube and pipe datasheet, NASA CR-123768, USGS Mineral Commodity Summaries 2026 Aluminum, and PubChem PUG View hazard records. Strength values are typical T6 tubular-product data. NASA handbook values with unspecified product form are explicitly marked that way. USGS shares are calculated from printed tonnages and rounded world production.
story:
  recipe:
    line: NASA describes 7075 as a wrought, heat-treatable aluminium alloy. Its nominal composition is aluminium balance with zinc, magnesium, copper and chromium as the main alloying elements. The Kaiser tube and pipe composition limits are for the product family and are not substituted for the nominal recipe listed here.
    parts:
      - name: Aluminium
        symbol: Al
        share_note: balance
        role: The matrix metal of the wrought alloy.
      - name: Zinc
        symbol: Zn
        share_percent: 5.6
        role: Principal hardening addition in the nominal recipe.
      - name: Magnesium
        symbol: Mg
        share_percent: 2.5
        role: Principal hardening addition in the nominal recipe.
      - name: Copper
        symbol: Cu
        share_percent: 1.6
        role: Alloying addition in the nominal recipe.
      - name: Chromium
        symbol: Cr
        share_percent: 0.3
        role: Alloying addition in the nominal recipe.
  risk_groups:
    - title: For people
      verdict: Alloy-specific health classification was not established.
      lead: PubChem component records include hazards for metal forms, but they do not classify 7075-T6 as supplied.
      gap: No supplier safety data sheet for 7075-T6 or its machining dust and welding fume was read.
      points:
        - label: Component records
          line: PubChem lists GHS statements for aluminium, magnesium, zinc and copper records. These are component-level records and should not be treated as the alloy's GHS classification.
    - title: If it fails
      lead: The NASA handbook identifies stress-corrosion cracking and corrosion in industrial or marine settings as concerns for 7075.
      points:
        - label: Stress-corrosion cracking
          line: T6 is susceptible in the short-transverse direction under stress-corrosion conditions; the handbook describes better resistance in T73.
        - label: Surface corrosion
          line: The handbook says industrial and marine environments attack 7075; cladding is one described protection method.
    - title: Handling and storage
      points:
        - label: Product-specific safety information
          line: Use the supplier SDS for the exact stock form and process, especially where machining dust or welding fume can be generated.
  why: 7075 is a high-strength wrought aluminium alloy whose main additions are zinc, magnesium, copper and chromium. The NASA handbook describes it as heat treatable and lists structural applications, including aircraft structures and hydraulic systems. This profile focuses on T6 and tubular product values where the Kaiser datasheet names both. T6 offers high strength, while the NASA handbook identifies short-transverse stress-corrosion cracking as a limitation and reports better resistance for T73.
  uses:
    - where: Aircraft structures and airframe parts
      line: The NASA handbook lists aircraft structures as a typical application and gives examples including engine nacelle covers and contoured wing-skin panels.
    - where: High-pressure hydraulic units
      line: The NASA handbook lists high-pressure hydraulic units among typical 7075 applications.
    - where: Launch vehicles and spacecraft
      line: The NASA handbook says structural alloy 7075 has been used in launch vehicles and spacecraft and discusses its space-environment behaviour.
  can_do:
    - label: Tensile strength
      value: 572 MPa
      line: The Kaiser tube and pipe datasheet reports typical T6 tensile strength of 572 MPa and yield strength of 503 MPa for a 0.500 inch diameter specimen.
    - label: Density
      value: 2.80 Mg/m3
      line: The datasheet gives a nominal density of 2.80 Mg/m3 at 20 °C.
    - label: Heat conduction
      value: 130 W/m·K
      line: The datasheet reports thermal conductivity of 130 W/m·K for T6 and T651 at 20 °C.
    - label: Thermal expansion
      value: 23.4 µm/m·K
      line: The linear coefficient of thermal expansion is 23.4 µm/m·K over 20 to 100 °C.
    - label: Fatigue
      value: 158 MPa
      line: Kaiser lists a typical endurance limit of 158 MPa under reversed stress in its R.R. Moore type test, with the datasheet's stated cycle count.
  compare: In Kaiser's comparative table, 7075-T6 has a C general-corrosion rating and a C stress-corrosion rating, while T73 has a C general-corrosion rating and a B stress-corrosion rating. The handbook also says T6 is susceptible to cracking in the short-transverse direction. The present profile does not include values for other alloys, so it does not rank 7075 against them.
  compare_rows:
    - label: Density
      benchmark: density
    - label: Yield strength
      benchmark: yield_strength
    - label: Thermal conductivity
      benchmark: thermal_conductivity
  handling:
    - Use the supplier SDS for the exact stock form and any machining or welding process.
    - Consider product direction and corrosive exposure when evaluating T6 parts for stress-corrosion cracking.
    - The NASA handbook describes Alclad sheet and plate as a corrosion-protection option.
  good_for:
    - T6 tube and pipe where high strength is useful; the datasheet gives typical yield strength of 503 MPa.
    - Wrought aircraft structures, airframe panels and hydraulic units named in the NASA handbook.
    - Spacecraft and launch-vehicle structural applications discussed in the NASA handbook.
  watch_out:
    - T6 is susceptible to stress-corrosion cracking in the short-transverse direction.
    - The NASA handbook reports attack in industrial and marine environments.
    - The mechanical values here are typical tubular-product values, not design allowables.
    - No 7075-T6 supplier SDS or alloy-specific flight exposure record was read.
  verdict: 7075-T6 combines high typical strength with aircraft and spacecraft structural precedent. Its main documented limitation here is stress-corrosion susceptibility, especially in the short-transverse direction, and the profile does not establish product-specific hazards or design allowables.