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2218 Aluminum vs. C82400 Copper

2218 aluminum belongs to the aluminum alloys classification, while C82400 copper belongs to the copper alloys. There are 27 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 2218 aluminum and the bottom bar is C82400 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
120
Elongation at Break, % 6.8 to 10
1.0 to 20
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
45
Tensile Strength: Ultimate (UTS), MPa 330 to 430
500 to 1030
Tensile Strength: Yield (Proof), MPa 260 to 310
260 to 970

Thermal Properties

Latent Heat of Fusion, J/g 390
230
Maximum Temperature: Mechanical, °C 220
270
Melting Completion (Liquidus), °C 640
1000
Melting Onset (Solidus), °C 510
900
Specific Heat Capacity, J/kg-K 870
380
Thermal Conductivity, W/m-K 140
130
Thermal Expansion, µm/m-K 22
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
25
Electrical Conductivity: Equal Weight (Specific), % IACS 110
26

Otherwise Unclassified Properties

Density, g/cm3 3.1
8.8
Embodied Carbon, kg CO2/kg material 8.2
8.9
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1130
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
10 to 83
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
270 to 3870
Stiffness to Weight: Axial, points 13
7.6
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 30 to 39
16 to 33
Strength to Weight: Bending, points 34 to 41
16 to 26
Thermal Diffusivity, mm2/s 52
39
Thermal Shock Resistance, points 15 to 19
17 to 36

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
0 to 0.15
Beryllium (Be), % 0
1.6 to 1.9
Chromium (Cr), % 0 to 0.1
0 to 0.1
Cobalt (Co), % 0
0.2 to 0.65
Copper (Cu), % 3.5 to 4.5
96 to 98.2
Iron (Fe), % 0 to 1.0
0 to 0.2
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 1.7 to 2.3
0 to 0.2
Silicon (Si), % 0 to 0.9
0
Tin (Sn), % 0
0 to 0.1
Titanium (Ti), % 0
0 to 0.12
Zinc (Zn), % 0 to 0.25
0 to 0.1
Residuals, % 0
0 to 0.5