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7175 Aluminum vs. C96900 Copper-nickel

7175 aluminum belongs to the aluminum alloys classification, while C96900 copper-nickel belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (4, 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 7175 aluminum and the bottom bar is C96900 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
120
Elongation at Break, % 3.8 to 5.9
4.5
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 26
45
Tensile Strength: Ultimate (UTS), MPa 520 to 570
850
Tensile Strength: Yield (Proof), MPa 430 to 490
830

Thermal Properties

Latent Heat of Fusion, J/g 380
210
Maximum Temperature: Mechanical, °C 180
210
Melting Completion (Liquidus), °C 640
1060
Melting Onset (Solidus), °C 480
960
Specific Heat Capacity, J/kg-K 870
380
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 99
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 10
39
Density, g/cm3 3.0
8.8
Embodied Carbon, kg CO2/kg material 8.2
4.6
Embodied Energy, MJ/kg 150
72
Embodied Water, L/kg 1130
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
38
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
2820
Stiffness to Weight: Axial, points 13
7.7
Stiffness to Weight: Bending, points 46
19
Strength to Weight: Axial, points 48 to 52
27
Strength to Weight: Bending, points 48 to 51
23
Thermal Shock Resistance, points 23 to 25
30

Alloy Composition

Aluminum (Al), % 88 to 91.4
0
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.2 to 2.0
73.6 to 78
Iron (Fe), % 0 to 0.2
0 to 0.5
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 2.1 to 2.9
0 to 0.15
Manganese (Mn), % 0 to 0.1
0.050 to 0.3
Nickel (Ni), % 0
14.5 to 15.5
Niobium (Nb), % 0
0 to 0.1
Silicon (Si), % 0 to 0.15
0 to 0.3
Tin (Sn), % 0
7.5 to 8.5
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 5.1 to 6.1
0 to 0.5
Residuals, % 0
0 to 0.5