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C81400 Copper vs. 8021 Aluminum

C81400 copper belongs to the copper alloys classification, while 8021 aluminum belongs to the aluminum alloys. There are 28 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 C81400 copper and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
70
Elongation at Break, % 11
2.3
Poisson's Ratio 0.34
0.33
Shear Modulus, GPa 41
26
Tensile Strength: Ultimate (UTS), MPa 370
160
Tensile Strength: Yield (Proof), MPa 250
130

Thermal Properties

Latent Heat of Fusion, J/g 210
400
Maximum Temperature: Mechanical, °C 200
170
Melting Completion (Liquidus), °C 1090
650
Melting Onset (Solidus), °C 1070
640
Specific Heat Capacity, J/kg-K 390
900
Thermal Conductivity, W/m-K 260
220
Thermal Expansion, µm/m-K 17
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 60
56
Electrical Conductivity: Equal Weight (Specific), % IACS 61
180

Otherwise Unclassified Properties

Base Metal Price, % relative 33
9.0
Density, g/cm3 8.9
2.8
Embodied Carbon, kg CO2/kg material 2.8
8.1
Embodied Energy, MJ/kg 45
150
Embodied Water, L/kg 310
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 260
130
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 18
49
Strength to Weight: Axial, points 11
16
Strength to Weight: Bending, points 13
23
Thermal Diffusivity, mm2/s 75
88
Thermal Shock Resistance, points 13
7.0

Alloy Composition

Aluminum (Al), % 0
98 to 98.8
Beryllium (Be), % 0.020 to 0.1
0
Chromium (Cr), % 0.6 to 1.0
0
Copper (Cu), % 98.4 to 99.38
0 to 0.050
Iron (Fe), % 0
1.2 to 1.7
Silicon (Si), % 0
0 to 0.15
Residuals, % 0
0 to 0.15