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2018 Aluminum vs. C17500 Copper

2018 aluminum belongs to the aluminum alloys classification, while C17500 copper belongs to the copper alloys. There are 30 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 2018 aluminum and the bottom bar is C17500 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
120
Elongation at Break, % 9.6
6.0 to 30
Fatigue Strength, MPa 120
170 to 310
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 27
45
Shear Strength, MPa 270
200 to 520
Tensile Strength: Ultimate (UTS), MPa 420
310 to 860
Tensile Strength: Yield (Proof), MPa 310
170 to 760

Thermal Properties

Latent Heat of Fusion, J/g 390
220
Maximum Temperature: Mechanical, °C 220
220
Melting Completion (Liquidus), °C 640
1060
Melting Onset (Solidus), °C 510
1020
Specific Heat Capacity, J/kg-K 870
390
Thermal Conductivity, W/m-K 150
200
Thermal Expansion, µm/m-K 22
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
24 to 53
Electrical Conductivity: Equal Weight (Specific), % IACS 120
24 to 54

Otherwise Unclassified Properties

Base Metal Price, % relative 11
60
Density, g/cm3 3.1
8.9
Embodied Carbon, kg CO2/kg material 8.1
4.7
Embodied Energy, MJ/kg 150
73
Embodied Water, L/kg 1130
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
30 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 670
120 to 2390
Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 45
18
Strength to Weight: Axial, points 38
9.7 to 27
Strength to Weight: Bending, points 41
11 to 23
Thermal Diffusivity, mm2/s 57
59
Thermal Shock Resistance, points 19
11 to 29

Alloy Composition

Aluminum (Al), % 89.7 to 94.4
0 to 0.2
Beryllium (Be), % 0
0.4 to 0.7
Chromium (Cr), % 0 to 0.1
0
Cobalt (Co), % 0
2.4 to 2.7
Copper (Cu), % 3.5 to 4.5
95.6 to 97.2
Iron (Fe), % 0 to 1.0
0 to 0.1
Magnesium (Mg), % 0.45 to 0.9
0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 1.7 to 2.3
0
Silicon (Si), % 0 to 0.9
0 to 0.2
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0 to 0.5