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CC381H Copper-nickel vs. 7021 Aluminum

CC381H copper-nickel belongs to the copper alloys classification, while 7021 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 CC381H copper-nickel and the bottom bar is 7021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
69
Elongation at Break, % 20
9.4
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 52
26
Tensile Strength: Ultimate (UTS), MPa 380
460
Tensile Strength: Yield (Proof), MPa 140
390

Thermal Properties

Latent Heat of Fusion, J/g 240
380
Maximum Temperature: Mechanical, °C 260
200
Melting Completion (Liquidus), °C 1180
630
Melting Onset (Solidus), °C 1120
510
Specific Heat Capacity, J/kg-K 410
870
Thermal Conductivity, W/m-K 30
150
Thermal Expansion, µm/m-K 16
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.8
38
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
120

Otherwise Unclassified Properties

Base Metal Price, % relative 40
9.5
Density, g/cm3 8.9
2.9
Embodied Carbon, kg CO2/kg material 5.0
8.3
Embodied Energy, MJ/kg 73
150
Embodied Water, L/kg 280
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 60
41
Resilience: Unit (Modulus of Resilience), kJ/m3 68
1110
Stiffness to Weight: Axial, points 8.6
13
Stiffness to Weight: Bending, points 19
47
Strength to Weight: Axial, points 12
44
Strength to Weight: Bending, points 13
45
Thermal Diffusivity, mm2/s 8.4
59
Thermal Shock Resistance, points 13
20

Alloy Composition

Aluminum (Al), % 0 to 0.010
90.7 to 93.7
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 0
0 to 0.050
Copper (Cu), % 64.5 to 69.9
0 to 0.25
Iron (Fe), % 0.5 to 1.5
0 to 0.4
Lead (Pb), % 0 to 0.030
0
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0.6 to 1.2
0 to 0.1
Nickel (Ni), % 29 to 31
0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.1
0 to 0.25
Sulfur (S), % 0 to 0.010
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