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C96900 Copper-nickel vs. 7021 Aluminum

C96900 copper-nickel belongs to the copper alloys classification, while 7021 aluminum belongs to the aluminum 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 C96900 copper-nickel and the bottom bar is 7021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
69
Elongation at Break, % 4.5
9.4
Poisson's Ratio 0.34
0.32
Shear Modulus, GPa 45
26
Tensile Strength: Ultimate (UTS), MPa 850
460
Tensile Strength: Yield (Proof), MPa 830
390

Thermal Properties

Latent Heat of Fusion, J/g 210
380
Maximum Temperature: Mechanical, °C 210
200
Melting Completion (Liquidus), °C 1060
630
Melting Onset (Solidus), °C 960
510
Specific Heat Capacity, J/kg-K 380
870
Thermal Expansion, µm/m-K 17
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
38
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
120

Otherwise Unclassified Properties

Base Metal Price, % relative 39
9.5
Density, g/cm3 8.8
2.9
Embodied Carbon, kg CO2/kg material 4.6
8.3
Embodied Energy, MJ/kg 72
150
Embodied Water, L/kg 360
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38
41
Resilience: Unit (Modulus of Resilience), kJ/m3 2820
1110
Stiffness to Weight: Axial, points 7.7
13
Stiffness to Weight: Bending, points 19
47
Strength to Weight: Axial, points 27
44
Strength to Weight: Bending, points 23
45
Thermal Shock Resistance, points 30
20

Alloy Composition

Aluminum (Al), % 0
90.7 to 93.7
Chromium (Cr), % 0
0 to 0.050
Copper (Cu), % 73.6 to 78
0 to 0.25
Iron (Fe), % 0 to 0.5
0 to 0.4
Lead (Pb), % 0 to 0.020
0
Magnesium (Mg), % 0 to 0.15
1.2 to 1.8
Manganese (Mn), % 0.050 to 0.3
0 to 0.1
Nickel (Ni), % 14.5 to 15.5
0
Niobium (Nb), % 0 to 0.1
0
Silicon (Si), % 0 to 0.3
0 to 0.25
Tin (Sn), % 7.5 to 8.5
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0 to 0.5
5.0 to 6.0
Zirconium (Zr), % 0
0.080 to 0.18
Residuals, % 0
0 to 0.15