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7075 Aluminum vs. C82700 Copper

7075 aluminum belongs to the aluminum alloys classification, while C82700 copper belongs to the copper alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 7075 aluminum and the bottom bar is C82700 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
120
Elongation at Break, % 1.8 to 12
1.8
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
46
Tensile Strength: Ultimate (UTS), MPa 240 to 590
1200
Tensile Strength: Yield (Proof), MPa 120 to 510
1020

Thermal Properties

Latent Heat of Fusion, J/g 380
240
Maximum Temperature: Mechanical, °C 200
300
Melting Completion (Liquidus), °C 640
950
Melting Onset (Solidus), °C 480
860
Specific Heat Capacity, J/kg-K 870
380
Thermal Conductivity, W/m-K 130
130
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
20
Electrical Conductivity: Equal Weight (Specific), % IACS 98
21

Otherwise Unclassified Properties

Density, g/cm3 3.0
8.7
Embodied Carbon, kg CO2/kg material 8.3
12
Embodied Energy, MJ/kg 150
180
Embodied Water, L/kg 1120
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8 to 44
21
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 1870
4260
Stiffness to Weight: Axial, points 13
7.8
Stiffness to Weight: Bending, points 46
19
Strength to Weight: Axial, points 22 to 54
38
Strength to Weight: Bending, points 28 to 52
29
Thermal Diffusivity, mm2/s 50
39
Thermal Shock Resistance, points 10 to 25
41

Alloy Composition

Aluminum (Al), % 86.9 to 91.4
0 to 0.15
Beryllium (Be), % 0
2.4 to 2.6
Chromium (Cr), % 0.18 to 0.28
0 to 0.090
Copper (Cu), % 1.2 to 2.0
94.6 to 96.7
Iron (Fe), % 0 to 0.5
0 to 0.25
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.3
0
Nickel (Ni), % 0
1.0 to 1.5
Silicon (Si), % 0 to 0.4
0 to 0.15
Tin (Sn), % 0
0 to 0.1
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 5.1 to 6.1
0 to 0.1
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0
0 to 0.5