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7075-T7651 Aluminum vs. 7475-T7651 Aluminum

Both 7075-T7651 aluminum and 7475-T7651 aluminum are aluminum alloys. Both are furnished in the T7651 temper. Their average alloy composition is basically identical. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 7075-T7651 aluminum and the bottom bar is 7475-T7651 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
70
Elongation at Break, % 7.3
11
Fatigue Strength, MPa 190
200
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 26
26
Shear Strength, MPa 320
320
Tensile Strength: Ultimate (UTS), MPa 550
540
Tensile Strength: Yield (Proof), MPa 470
460

Thermal Properties

Latent Heat of Fusion, J/g 380
380
Maximum Temperature: Mechanical, °C 200
180
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 480
480
Specific Heat Capacity, J/kg-K 870
870
Thermal Conductivity, W/m-K 130
140
Thermal Expansion, µm/m-K 23
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
33
Electrical Conductivity: Equal Weight (Specific), % IACS 98
98

Otherwise Unclassified Properties

Base Metal Price, % relative 10
10
Density, g/cm3 3.0
3.0
Embodied Carbon, kg CO2/kg material 8.3
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1120
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38
57
Resilience: Unit (Modulus of Resilience), kJ/m3 1580
1510
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
46
Strength to Weight: Axial, points 51
50
Strength to Weight: Bending, points 50
49
Thermal Diffusivity, mm2/s 50
54
Thermal Shock Resistance, points 24
24

Alloy Composition


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Aluminum (Al), % 86.9 to 91.4
88.6 to 91.6
Chromium (Cr), % 0.18 to 0.28
0.18 to 0.25
Copper (Cu), % 1.2 to 2.0
1.2 to 1.9
Iron (Fe), % 0 to 0.5
0 to 0.12
Magnesium (Mg), % 2.1 to 2.9
1.9 to 2.6
Manganese (Mn), % 0 to 0.3
0 to 0.060
Silicon (Si), % 0 to 0.4
0 to 0.1
Titanium (Ti), % 0 to 0.2
0 to 0.060
Zinc (Zn), % 5.1 to 6.1
5.1 to 6.2
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0 to 0.15