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7108A Aluminum vs. C72500 Copper-nickel

7108A aluminum belongs to the aluminum alloys classification, while C72500 copper-nickel belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, 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 C72500 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
120
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
45
Tensile Strength: Ultimate (UTS), MPa 350
420 to 780

Thermal Properties

Latent Heat of Fusion, J/g 380
210
Maximum Temperature: Mechanical, °C 210
210
Melting Completion (Liquidus), °C 630
1130
Melting Onset (Solidus), °C 520
1060
Specific Heat Capacity, J/kg-K 870
390
Thermal Conductivity, W/m-K 150
54
Thermal Expansion, µm/m-K 24
17

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 10
35
Density, g/cm3 2.9
8.9
Embodied Carbon, kg CO2/kg material 8.3
3.6
Embodied Energy, MJ/kg 150
55
Embodied Water, L/kg 1150
320

Common Calculations

Stiffness to Weight: Axial, points 13
7.6
Stiffness to Weight: Bending, points 47
19
Strength to Weight: Axial, points 33 to 34
13 to 24
Strength to Weight: Bending, points 38
14 to 21
Thermal Diffusivity, mm2/s 59
16
Thermal Shock Resistance, points 15 to 16
14 to 27

Alloy Composition

Aluminum (Al), % 91.6 to 94.4
0
Chromium (Cr), % 0 to 0.040
0
Copper (Cu), % 0 to 0.050
85.2 to 89.7
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.6
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0.7 to 1.5
0
Manganese (Mn), % 0 to 0.050
0 to 0.2
Nickel (Ni), % 0
8.5 to 10.5
Silicon (Si), % 0 to 0.2
0
Tin (Sn), % 0
1.8 to 2.8
Titanium (Ti), % 0 to 0.030
0
Zinc (Zn), % 4.8 to 5.8
0 to 0.5
Zirconium (Zr), % 0.15 to 0.25
0
Residuals, % 0
0 to 0.2