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7108A Aluminum vs. C70700 Copper-nickel

7108A aluminum belongs to the aluminum alloys classification, while C70700 copper-nickel belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 7108A aluminum and the bottom bar is C70700 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
120
Elongation at Break, % 11 to 13
39
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
46
Shear Strength, MPa 210
220
Tensile Strength: Ultimate (UTS), MPa 350
320
Tensile Strength: Yield (Proof), MPa 290 to 300
110

Thermal Properties

Latent Heat of Fusion, J/g 380
220
Maximum Temperature: Mechanical, °C 210
220
Melting Completion (Liquidus), °C 630
1120
Melting Onset (Solidus), °C 520
1060
Specific Heat Capacity, J/kg-K 870
390
Thermal Conductivity, W/m-K 150
59
Thermal Expansion, µm/m-K 24
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
11
Electrical Conductivity: Equal Weight (Specific), % IACS 110
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
34
Density, g/cm3 2.9
8.9
Embodied Carbon, kg CO2/kg material 8.3
3.4
Embodied Energy, MJ/kg 150
52
Embodied Water, L/kg 1150
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38 to 44
100
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 640
51
Stiffness to Weight: Axial, points 13
7.6
Stiffness to Weight: Bending, points 47
19
Strength to Weight: Axial, points 33 to 34
10
Strength to Weight: Bending, points 38
12
Thermal Diffusivity, mm2/s 59
17
Thermal Shock Resistance, points 15 to 16
12

Alloy Composition

Aluminum (Al), % 91.6 to 94.4
0
Chromium (Cr), % 0 to 0.040
0
Copper (Cu), % 0 to 0.050
88.5 to 90.5
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.050
Magnesium (Mg), % 0.7 to 1.5
0
Manganese (Mn), % 0 to 0.050
0 to 0.5
Nickel (Ni), % 0
9.5 to 10.5
Silicon (Si), % 0 to 0.2
0
Titanium (Ti), % 0 to 0.030
0
Zinc (Zn), % 4.8 to 5.8
0
Zirconium (Zr), % 0.15 to 0.25
0
Residuals, % 0
0 to 0.5