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
MS/m = 0.58⋅% IACS
1 cal/(g.C) = 1 Btu/(lb. F)
AA 7075 Aluminum Physical Properties
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Notes:
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Alclad 7075-T6, T651 315 (46) –
Average value of tensile and compression modulus. The compressive modulus is approximately 2% higher than the tensile modulus (Young’s modulus).
Mechanical Properties of 7075-T6 Aluminum in SAE AMS and ASTM Standard
Aluminum 7075 Mechanical Properties – Rolled or Cold Finished Bar, Rod, and Wire
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) Elongation in 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
Aluminium Alloy 7075 Mechanical Properties – Extruded Bars, Rods, Wire, Profiles, and Tubes
Standard Aluminum Alloy and Temper Specified Diameter or Thickness, in. Area, in2 Tensile Strength, ksi, ≥ (unless otherwise specified) Yield Strength (0.2 % offset), ksi, ≥ (unless otherwise specified) Elongation in 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
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
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
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
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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
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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
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0.126-0.249 73.0 62.0 8 –
7075-T7651 plate 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 –
7075 F 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 2
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
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Alclad 7075 T76 sheet 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 plate 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 2
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
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Alclad 7075 F, 1-Side 0.250-2.000 – – – –
Applications of Alloy 7075
Typical applications of alloy 7075 are aircraft structures, piping systems, mobile equipment and high-pressure hydraulics, blow molds, ultrasonic plastic welding molds, shoe molds, paper molds, foam molds, dewaxing molds, jigs, mold machining, high-end aluminum alloy bicycle frames, etc .
7075 Aluminium Alloy Equivalent Material
Aluminum alloy 7075 equivalent to European EN (German DIN EN, British BSI EN, France NF EN), ISO, Japanese JIS and Chinese GB standard (for reference).
Notes: DIN 1725-1 has been replaced by DIN EN 573-3.
7075 Aluminium Alloy Equivalent
US ISO European Union Germany Japan Australia and New Zealand China
Standard AISI (UNS) Standard Designation Standard Numerical (Chemical symbols) Standard Designation (Material number) Standard Grade Standard Designation Standard Grade
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 EN AW-7075
(EN AW-AlZn5,5MgCu) DIN 1725-1 AlZnMgCu1,5 (3.4365) JIS H4000;
JIS H4040 7075 AS 2848.1,
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