7075 aluminum alloy is a high-strength, heat-treatable wrought 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. The tempered design include aluminum 7075-T6, T651, T7351, T73, T76, T7651, O, W, W51, etc.
Aluminum 7075 responds to age hardening heat treatment, resulting in extremely high mechanical properties. However, this alloy exhibits a certain degree of notch sensitivity. Material 7075 shows good formability in annealed and solution heat treated conditions at ambient temperature and in 7075-T6 conditions at elevated temperatures.
The 7075 alloy has good machinability in the annealed condition, little or no warping occurs during the age-hardening process. Its corrosion resistance is good and is further improved by heat treatment and aging. The alloy resists stress corrosion cracking in the 7075-T73 temper. Al-7075 can be resistance welded, but fusion welding is not generally recommended.
AA-7075 has various sizes and can be used for thin plates, strips, plates, bars, wires, seamless tubes, forgings, shapes and extrusions.
The abbreviations AA7075 and Al-7075 in this article are the same material. Al-Aluminum; AA-Aluminum Alloy or The Aluminum Association.
7075 Aluminum Properties
The following tables and lists summarize 7075 aluminum properties, datasheet and specs including chemical composition, physical properties and mechanical properties, welding, hardness, machinability, heat treating, etc.
Chemical Composition
Aluminium 7075 chemical composition is listed in the following table.
7075 Aluminum Chemical Composition, %
Standard ANSI Alloy (UNS) Si Fe, ≤ Cu 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) Remainder
Notes (various standards of 7075 aluminum alloy):
ASTM B209: Aluminium and Aluminum-Alloy Sheet and Plate.
ASTM B210: Drawn Seamless Tubes.
ASTM B211: Rolled or Cold Finished Bar, Rod, and Wire.
ASTM B221: Extruded Bars, Rods, Wire, Profiles and Tubes.
AMS-QQ-A-225/9: Aluminium 7075, Bar, Rod, Wire, and Special Shapes; Rolled, Drawn, or Cold Finished
AMS-QQ-A-200/11: Al 7075, Bar, Rod, Shapes, Tube, and Wire, Extruded
AMS-QQ-A-250/12: AA 7075, Plate and Sheet
AMS-WW-T-700/7: Tube, Drawn, Seamless
Aluminium Alloy 7075 Physical Properties
Aluminium alloy 7075 physical properties are given in the following lists, including aluminum density, melting point, coefficient of thermal expansion, elastic modulus, thermal conductivity, specific heat capacity electrical conductivity, and electrical resistance.
Notes:
10-6·K-1 = 10-6/K = 1 μm/m·°C
1 Ω·mm²/m = 1 μΩ·m
1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
1 GPa = 1 kN/mm2
1 MPa = 1 N/mm2
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Notes:
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0.125-8.000 10
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0.125-4.000 77 66 7
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0.125-4.000 77 66 7
4.001-6.000 75 64 7
6.001-7.000 73 62 7
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0.125-4.000 68 56 10
4.001-5.000 66 55 8
5.001-6.000 64 52 8
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78 71
70 7
6
4.500-5.000 ≤32 78 68 6
AA 7075-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
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>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
2.001-3.000 ≤20 74 64
3.001-4.000 ≤20 74 63
AA 7075 Aluminum Mechanical Properties – Drawn Seamless Tubes Elongation in 2 in. or 4xDiameter, ≥, %
Standard Aluminum Alloy and Temper Specified Diameter or Thickness, in. Tensile Strength, ksi, ≥ (unless otherwise specified) Yield Strength (0.2 % offset), ksi, ≥ (unless otherwise specified) Full-Section Specimen Cut-Out Specimen
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
0.260-0.500 77 66 9 8
Aluminium 7075 Mechanical Properties – Plate and Sheet
Standard Aluminium Alloy and Temper Specified Thickness, in. Tensile Strength, ksi, ≥ (unless otherwise specified) Yield Strength (0.2 % offset), ksi, ≥ (unless otherwise specified) Elongation in 2 in. or 4xDiameter, ≥, % Bend 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 2
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 –
2.001-2.500 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 –
7075 T73 sheet 0.040-0.249 67.0 56.0 8 –
AA-7075 T7351 plate 0.250-1.000 69.0 57.0 7 –
1.001-2.000 69.0 57.0 6 –
2.001-2.500 66.0 52.0 6 –
2.501-3.000 64.0 49.0 6 –
3.001-3.500 63.0 49.0 6 –
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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
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0.500-1.000 78.0 68.0 7 –
1.001-2.000 77.0 67.0 6 –
2.001-2.500 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 –
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0.126-0.187 68.0 57.0 8
0.188-0.249 70.0 59.0 8
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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
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0.500-1.000 78.0 68.0 7 –
1.001-2.000 77.0 67.0 6 –
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ASTM B209,
ASTM B210,
ASTM B211,
ASTM B221,
AMS-QQ-A-225/9,
AMS-QQ-A-200/11,
AMS-QQ-A-250/12,
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JIS H4040 7075 AS 2848.1,
AS/NZS 1734,
AS/NZS 1865,
AS/NZS 1866 7075 GB/T 3190;
GB/T 3880.2 7075.
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