7075 Aluminum Alloy (7075-T6, 7075-T651, 7075-T7351, 7075-T73)
7075 aluminum alloy is a high-strength, heat-treatable forged alloy developed by Alcoa in 1943. The alloy contains zinc, magnesium, chromium and copper as hardeners, as well as small amounts of iron, silicon, manganese and titanium. Al-7075 is much stronger than carbon steel after heat treatment. Tempered design includes aluminum 7075-T6, T651, T7351, T73, T76, T7651, O, W, W51, etc.
7075 aluminum responds to age-hardening heat treatment, resulting in extremely high mechanical properties. However, this alloy exhibits a certain degree of notch sensitivity. The 7075 material shows good formability in solution annealed and heat-treated conditions at room temperature and in 7075-T6 conditions at elevated temperatures.
Alloy 7075 has good machinability in the annealed condition, with little or no deformation occurring during the age hardening process. Its corrosion resistance is good and is improved by heat treatment and aging. The alloy resists stress corrosion cracking in temper 7075-T73. Al-7075 can be resistance welded, but fusion welding is generally not recommended.
AA-7075 has various sizes and can be used for thin sheets, strips, plates, bars, wires, seamless tubes, forgings, profiles and extrusions.
The abbreviations AA7075 and Al-7075 in this article are the same material. Al-Aluminum; AA Aluminum Alloy or Aluminum Association.
Properties of 7075 aluminum
The following tables and lists summarize the properties, data sheets and specifications of 7075 aluminum, including chemical composition, physical and mechanical properties, welding, hardness, machinability, heat treatment, etc.
Chemical composition
The chemical composition of 7075 aluminum is listed in the following table.
| Chemical Composition of Aluminum 7075, % | |||||||||||
| Standard | ANSI Alloy (UNS) | Yes | Fe, ≤ | Ass | Mn, ≤ | mg | Cr | Zn, ≤ | Ti, ≤ | Other elements, each (total), ≤ | Al |
| ASTM B209, ASTM B210, ASTM B211, ASTM B221, AMS-QQ-A-225/9, AMS-QQ-A-200/11, AMS-QQ-A-250/12, AMS-WW-T-700/7 |
7075 (UNS A97075) |
0.40 | 0.50 | 1.2-2.0 | 0:30 | 2.1-2.9 | 0.18-0.28 | 5.1-6.1 | 0.20 | 0.05 (0.15) | Remaining |
Notes (various standards of 7075 aluminum alloy):
- ASTM B209: Aluminum and aluminum alloy sheets and plates.
- ASTM B210: Seamless Drawn Tubes.
- ASTM B211: Cold-rolled or finished bars, rebar, and wire.
- ASTM B221: Bars, rebar, wire, profiles and extruded tubes.
- AMS-QQ-A-225/9: Aluminum 7075, Bar, Rod, Wire and Special Shapes; Rolled, drawn or cold finished
- AMS-QQ-A-200/11: Al 7075, bar, rod, forms, tube and wire, extruded
- AMS-QQ-A-250/12: AA 7075, Plate and Sheet
- AMS-WW-T-700/7: Tube, drawn, seamless
Physical Properties of 7075 Aluminum Alloy
The physical properties of 7075 aluminum alloy are given in the following lists, including aluminum density, melting point, coefficient of thermal expansion, modulus of elasticity, thermal conductivity, specific heat capacity, electrical conductivity and electrical resistance.
Grades:
- 10 -6 ·K -1 = 10 -6 /K = 1 μm/m·°C
- 1Ω mm²/m = 1 μΩ m
- 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
- 1 GPa = 1kN/mm2
- 1 MPa = 1 N/mm2
- MS/m = 0.58⋅% IACS
- 1 cal/(gC) = 1 Btu/(lb. F)
| Physical Properties of AA 7075 Aluminum | ||||||||||
| League and Temperament | Density, g/cm3 (lb/in.3) | Specific gravity | Melting point, °C (°F) | Specific heat capacity, J/kg·K (Btu/lb ·°F) | Coefficient of thermal expansion, 10-6/K (μin./in. ·°F) | Thermal diffusivity, mm2/s | Thermal conductivity, W/m·°C (Btu∙in/h∙ft2∙°F) | Electrical conductivity, equal volume (equal weight), % IACS | Electrical conductivity, equal volume (equal weight), MS/m | Electrical resistivity, Ω·mm2/m (Ω·circ mil/ft) |
| 7075-T6 | 2.81 (0.101) | 2.81 | 477-638 (890-1175) | 960 (0.23) at 20°C (68°F) | 23.6 (13.1) at 20-100°C (68-212°F) | 48.36 | 130 (900) to 25°C (77°F) | 33 (105) to 20°C (68°F) | 19 (61) to 20 °C (68 °F) | 0.0515 (31) at 20°C (68°F) |
Grades:
- The melting range shown applies to forged products with a thickness of 6.35 mm (1/4 inch) or greater.
- Homogenization can increase the eutectic melting temperature by 10 to 20 °C, but generally does not eliminate eutectic melting.
Mechanical Properties of Aluminum 7075
The mechanical properties of 7075-T6 aluminum are listed in the following tables, including yield strength (yield stress), ultimate tensile strength, shear strength, modulus of elasticity, modulus of elasticity, etc.
The following mechanical properties are the average value of various product sizes, shapes and manufacturing methods, so the properties cannot be guaranteed. They are only used as a basis for alloy comparison and tempering and should not be specified as engineering requirements or used for design purposes.
| Mechanical Properties of 7075-T6 Aluminum, Not for Design, Part 1 | |||||
| Aluminum alloy and quenching | Ultimate tensile strength, MPa (ksi) | Yield strength, MPa (ksi) | Elongation by 50 mm (2 in.), %, ≥ | Brinell hardness, HB (load of 500 kgf 10mm ball) | |
| 1.6 mm (1/16 in.) thick sample | 12.5 mm (1/2 in.) thick sample | ||||
| 7075-O | 230 (33) | 105 (15) | 17 | 14 | 60 |
| AA7075-T6, T651 | 570 (83) | 505 (73) | 11 | 11 | 150 |
| Alclad 7075-O | 220 (32) | 95 (14) | 17 | – | – |
| Alclad 7075-T6, T651 | 525 (76) | 460 (67) | 11 | – | – |
| Mechanical Properties of 7075-T6 Aluminum, Not for Design, Part 2 | |||
| Aluminum alloy and quenching | Ultimate shear strength, MPa (ksi) | Modulus of elasticity, GPa (10 6 psi) | Fatigue resistance limit, MPa (ksi) |
| 7075-O | 150 (22) | 72 (10.4) | – |
| 7075-T6, T651 | 330 (48) | 160 (23) | |
| Alclad 7075-O | 150 (22) | – | |
| Alclad 7075-T6, T651 | 315 (46) | – | |
Average value of the tensile and compression modulus. The compression modulus is approximately 2% greater than the tensile modulus (Young's modulus).
Mechanical Properties of 7075-T6 Aluminum in SAE AMS and ASTM Standard
| Mechanical Properties of Aluminum 7075 – Cold rolled or finished bars, rebars and wires | |||||
| Standard | Aluminum alloy and quenching | Specified diameter or thickness, in. | Tensile strength, ksi, ≥ (unless otherwise specified) | Yield strength (0.2% shift), ksi, ≥ (unless otherwise specified) | Stretch by 2 in. or 4xDiameter, ≥, % |
| ASTM B211 SAE AMS-QQ-A-225/9 |
7075-O | ≤0.124 | 40, ≤ | 12.0 | – |
| 0.125-8.000 | 10 | ||||
| 7075-T6, T62 | ≤ 0.124 | 77 | 66 | – | |
| 0.125-4.000 | 77 | 66 | 7 | ||
| 7075-T651 | ≤0.124 | 77 | 66 | – | |
| 0.125-4.000 | 77 | 66 | 7 | ||
| 4,001-6,000 | 75 | 64 | 7 | ||
| 6,001-7,000 | 73 | 62 | 7 | ||
| 7075-T7351, T73 | ≤ 0.124 | 68 | – | – | |
| 0.125-4.000 | 68 | 56 | 10 | ||
| 4,001-5,000 | 66 | 55 | 8 | ||
| 5,001-6,000 | 64 | 52 | 8 | ||
| Mechanical properties of 7075 aluminum alloy – Bars, rods, wires, profiles and extruded tubes | ||||||
| Standard | Aluminum alloy and quenching | Specified diameter or thickness, in. | Area, in2 | Tensile strength, ksi, ≥ (unless otherwise specified) | Yield strength (0.2% shift), ksi, ≥ (unless otherwise specified) | Stretch by 2 in. or 4xDiameter, ≥, % |
| ASTM B221 SAE AMS-QQ-A-200/11 |
7075-O | all | all | 40, ≤ | 24, ≤ | 10 |
| AA 7075-T6, T62, T6510, T6511 | ≤ 0.249 | all | 78 | 70 | 7 | |
| 0.250-0.499 | all | 81 | 73 | 7 | ||
| 0.500-1.499 | all | 81 | 72 | 7 | ||
| 1,500-2,999 | all | 81 | 72 | 7 | ||
| 3,000-4,499 | ≤ 20 >20, ≤32 |
81 78 |
71 70 |
7 6 |
||
| 4,500-5,000 | ≤32 | 78 | 68 | 6 | ||
| AA7075-T73, T73510, T73511 | 0.062-0.249 | ≤ 20 | 68 | 58 | 7 | |
| 0.250-1.499 | ≤ 25 | 70 | 61 | 8 | ||
| 1,500-2,999 | ≤ 25 | 69 | 59 | 8 | ||
| 3,000-4,499 | ≤ 20 >20, ≤32 |
68.0 65.0 |
57.0 55.0 |
7 7 |
||
| AA-7075-T76, T76510, T76511 | ≤ 0.049 | all | 73 | 63 | 7 | |
| 0.050-0.124 | all | 74 | 64 | |||
| 0.125-0.249 | ≤20 | 74 | 64 | |||
| 0.250-0.499 | ≤20 | 75 | 65 | |||
| 0.500-1.000 | ≤20 | 75 | 65 | |||
| 1,001-2,000 | ≤20 | 75 | 65 | |||
| 2001-3000 | ≤20 | 74 | 64 | |||
| 3,001-4,000 | ≤20 | 74 | 63 | |||
| Mechanical Properties of Aluminum AA 7075 – Seamless designed tubes | Stretch by 2 in. or 4xDiameter, ≥, % | |||||
| Standard | Aluminum alloy and quenching | Specified diameter or thickness, in. | Tensile strength, ksi, ≥ (unless otherwise specified) | Yield strength (0.2% shift), ksi, ≥ (unless otherwise specified) | Full Section Sample | Cropped sample |
| ASTM B210 SAE AMS-WW-T-700/7 |
7075-O | 0.025-0.049 | 40, ≤ | 21, ≤ | 10 | 8 |
| 0.050-0.500 | 40,≤ | 21, ≤ | 12 | 10 | ||
| 7075-T6, T62 | 0.025-0.259 | 77 | 66 | 8 | 7 | |
| .260-.500 | 77 | 66 | 9 | 8 | ||
| Mechanical Properties of Aluminum 7075 – Plate and Foil | ||||||
| Standard | Aluminum alloy and quenching | Specified thickness, in. | Tensile strength, ksi, ≥ (unless otherwise specified) | Yield strength (0.2% shift), ksi, ≥ (unless otherwise specified) | Stretch by 2 in. or 4xDiameter, ≥, % | Bending diameter factor, N |
| ASTM B209 SAE AMS-QQ-A-250/12 |
7075-O | 0.015-0.020 | 40, ≤ | 21,≤ | 10 | 1 |
| 0.021-0.062 | two | |||||
| 0.063-0.091 | 3 | |||||
| 0.092-0.125 | 4 | |||||
| 0.126-0.249 | 5 | |||||
| 0.250-0.499 | 6 | |||||
| 0.500-2.000 | – | |||||
| 7075-T6, T62 | 0.008-0.011 | 74.0 | 63.0 | 5 | 7 | |
| 0.012-0.020 | 76.0 | 67.0 | 8 | 7 | ||
| 0.021-0.039 | 76.0 | 67.0 | 8 | 8 | ||
| 0.040-0.062 | 78.0 | 68.0 | 9 | 8 | ||
| 0.063-0.091 | 78.0 | 68.0 | 9 | 9 | ||
| 0.092-0.125 | 78.0 | 68.0 | 9 | 10 | ||
| 0.126-0.187 | 79.0 | 69.0 | 9 | 11 | ||
| 0.188-0.249 | 80.0 | 69.0 | 9 | 11 | ||
| 7075 T651, T62 | 0.250-0.499 | 78.0 | 67.0 | 9 | 14 | |
| 0.500-1.000 | 78.0 | 68.0 | 7 | – | ||
| 1,001-2,000 | 77.0 | 67.0 | 6 | – | ||
| 2001-2500 | 76.0 | 64.0 | 5 | – | ||
| 2,501-3,000 | 72.0 | 61.0 | 5 | – | ||
| 3,001-3,500 | 71.0 | 58.0 | 5 | – | ||
| 3,501-4,000 | 67.0 | 54.0 | 3 | – | ||
| Sheet 7075 T73 | 0.040-0.249 | 67.0 | 56.0 | 8 | – | |
| AA-7075 T7351 Board | 0.250-1.000 | 69.0 | 57.0 | 7 | – | |
| 1,001-2,000 | 69.0 | 57.0 | 6 | – | ||
| 2001-2500 | 66.0 | 52.0 | 6 | – | ||
| 2,501-3,000 | 64.0 | 49.0 | 6 | – | ||
| 3,001-3,500 | 63.0 | 49.0 | 6 | – | ||
| 3,501-4,000 | 61.0 | 48.0 | 6 | – | ||
| Sheet 7075-T76 | 0.063-0.125 | 73.0 | 62.0 | 8 | – | |
| 0.126-0.249 | 73.0 | 62.0 | 8 | – | ||
| 7075-T7651 Board | 0.250-0.499 | 72.0 | 61.0 | 8 | – | |
| 0.500-1.000 | 71.0 | 60.0 | 6 | – | ||
| 1,001-2,000 | 71.0 | 60.0 | 5 | – | ||
| 7075F | 0.250-4.000 | – | – | – | – | |
| Alclad 7075-O | 0.008-0.014 | 36.0, ≤ | 20.0,≤ | 9 | 1 | |
| 0.015-0.032 | 36.0, ≤ | 20.0,≤ | 10 | 1 | ||
| 0.033-0.062 | 36.0, ≤ | 20.0,≤ | 10 | two | ||
| 0.063-0.125 | 38, ≤ | 20.0,≤ | 10 | 3 | ||
| 0.126-0.187 | 38, ≤ | 20.0,≤ | 10 | 4 | ||
| 0.188-0.249 | 39, ≤ | 21.0,≤ | 10 | 4 | ||
| 0.250-0.499 | 39, ≤ | 21.0,≤ | 10 | 6 | ||
| 0.500-1.000 | 40, ≤ | – | 10 | – | ||
| Alclad 7075-T6, T62 | 0.008-0.011 | 68.0 | 58.0 | 5 | 6 | |
| 0.012-0.020 | 71.0 | 61.0 | 8 | 6 | ||
| 0.021-0.039 | 71.0 | 61.0 | 8 | 7 | ||
| 0.040-0.062 | 72.0 | 62.0 | 9 | 7 | ||
| 0.063-0.091 | 74.0 | 64.0 | 9 | 8 | ||
| 0.092-0.125 | 74.0 | 64.0 | 9 | 9 | ||
| 0.126-0.187 | 74.0 | 64.0 | 9 | 10 | ||
| 0.188-0.249 | 76.0 | 65.0 | 9 | 10 | ||
| Alclad 7075-T651, T62 | 0.250-0.499 | 75.0 | 65.0 | 9 | 12 | |
| 0.500-1.000 | 78.0 | 68.0 | 7 | – | ||
| 1,001-2,000 | 77.0 | 67.0 | 6 | – | ||
| 2001-2500 | 76.0 | 64.0 | 5 | – | ||
| 2,501-3,000 | 72.0 | 61.0 | 5 | – | ||
| 3,001-3,500 | 71.0 | 58.0 | 5 | – | ||
| 3,501-4,000 | 67.0 | 54.0 | 3 | – | ||
| Alclad Sheet 7075 T76 | 0.040-0.062 | 67.0 | 56.0 | 8 | – | |
| 0.063-0.125 | 68.0 | 57.0 | 8 | – | ||
| 0.126-0.187 | 68.0 | 57.0 | 8 | |||
| 0.188-0.249 | 70.0 | 59.0 | 8 | |||
| Alclad 7075 T7651 Board | 0.250-0.499 | 69.0 | 58.0 | 8 | – | |
| 0.500-1.000 | 71.0 | 60.0 | 6 | – | ||
| Alclad 7075 F | 0.250-4.000 | – | – | – | – | |
| Alclad 7075-O, 1 side | 0.015-0.032 | 38.0, ≤ | 21.0,≤ | 10 | 1 | |
| 0.033-0.062 | 38.0, ≤ | 21.0,≤ | 10 | two | ||
| 0.063-0.125 | 39.0, ≤ | 21.0,≤ | 10 | 3 | ||
| 0.092-0.125 | 39.0, ≤ | 21.0,≤ | 10 | 4 | ||
| 0.126-0.187 | 39.0, ≤ | 21.0,≤ | 10 | 5 | ||
| 0.188-0.249 | 39.0, ≤ | 21.0,≤ | 10 | 5 | ||
| 0.250-0.499 | 39.0, ≤ | 21.0,≤ | 10 | 6 | ||
| 0.500-1.000 | 40, ≤ | – | 10 | – | ||
| Alclad 7075-T6, T62, 1 side | 0.008-0.011 | 71.0 | 60 | 5 | – | |
| 0.012-0.020 | 74.0 | 64 | 8 | – | ||
| 0.015-0.032 | 74.0 | 64 | 8 | 7 | ||
| 0.033-0.03 | 74.0 | 64 | 8 | 8 | ||
| 0.040-0.062 | 75.0 | 65 | 9 | 8 | ||
| 0.063-0.091 | 76.0 | 66 | 9 | 9 | ||
| 0.092-0.125 | 76.0 | 66 | 9 | 10 | ||
| 0.126-0.187 | 77.0 | 67 | 9 | 11 | ||
| 0.188-0.249 | 78 | 67 | 9 | 11 | ||
| Alclad 7075-T651, T62, 1 side | 0.250-0.499 | 76.0 | 66.0 | 9 | 13 | |
| 0.500-1.000 | 78.0 | 68.0 | 7 | – | ||
| 1,001-2,000 | 77.0 | 67.0 | 6 | – | ||
| Alclad 7075 F, 1 side | 0.250-2.000 | – | – | – | – | |
League 7075 Applications
Typical applications of alloy 7075 are aircraft structures, piping systems, mobile equipment and high pressure hydraulic systems, blow molds, ultrasonic plastic welding molds, shoe molds, paper molds, foam molds, dewaxing molds , jigs, mold machining, high quality aluminum alloy bicycle frames, etc.
Equivalent material of 7075 aluminum alloy
7075 aluminum alloy equivalent to European EN standard (German DIN EN, British BSI EN, France NF EN), ISO, Japanese JIS and Chinese standard GB (for reference).
Notes: DIN 1725-1 has been replaced by DIN EN 573-3.
| 7075 aluminum alloy equivalent | |||||||||||||
| USA | ISO | European Union | Germany | Japan | Australia and New Zealand | China | |||||||
| Standard | AISI (UNS) | Standard | Designation | Standard | Numeric (chemical symbols) | Standard | Designation (material number) | Standard | Note | Standard | Designation | Standard | Note |
| ASTM B209, ASTM B210, ASTM B211, ASTM B221, AMS-QQ-A-225/9, AMS-QQ-A-200/11, AMS-QQ-A-250/12, AMS-WW-T-700/7 |
7075 (UNS A97075) | ISO 209 | AW-7075 | EN 573-3 | PT AW-7075 (EN AW-AlZn5.5MgCu) |
DIN 1725-1 | AlZnMgCu1.5 (3.4365) | JIS H4000; JIS H4040 |
7075 | LIKE 2848.1, AS/NZS 1734, AS/NZS 1865, AS/NZS 1866 |
7075 | GB/T 3190; GB/T 3880.2 |
7075 |
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