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2018 Aluminum vs. C70250 Copper

2018 aluminum belongs to the aluminum alloys classification, while C70250 copper belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, 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 2018 aluminum and the bottom bar is C70250 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
120
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 27
44
Tensile Strength: Ultimate (UTS), MPa 420
520 to 740

Thermal Properties

Latent Heat of Fusion, J/g 390
220
Maximum Temperature: Mechanical, °C 220
210
Melting Completion (Liquidus), °C 640
1100
Melting Onset (Solidus), °C 510
1080
Specific Heat Capacity, J/kg-K 870
390
Thermal Conductivity, W/m-K 150
170
Thermal Expansion, µm/m-K 22
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
36 to 50
Electrical Conductivity: Equal Weight (Specific), % IACS 120
37 to 51

Otherwise Unclassified Properties

Base Metal Price, % relative 11
31
Density, g/cm3 3.1
8.9
Embodied Carbon, kg CO2/kg material 8.1
2.9
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1130
310

Common Calculations

Stiffness to Weight: Axial, points 13
7.4
Stiffness to Weight: Bending, points 45
18
Strength to Weight: Axial, points 38
16 to 23
Strength to Weight: Bending, points 41
16 to 21
Thermal Diffusivity, mm2/s 57
49
Thermal Shock Resistance, points 19
18 to 26

Alloy Composition

Aluminum (Al), % 89.7 to 94.4
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
92.7 to 97.5
Iron (Fe), % 0 to 1.0
0
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0.45 to 0.9
0.050 to 0.3
Manganese (Mn), % 0 to 0.2
0 to 0.1
Nickel (Ni), % 1.7 to 2.3
2.2 to 4.2
Silicon (Si), % 0 to 0.9
0.25 to 1.2
Zinc (Zn), % 0 to 0.25
0 to 1.0
Residuals, % 0
0 to 0.5