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2124 Aluminum vs. CR020A Copper

2124 aluminum belongs to the aluminum alloys classification, while CR020A copper belongs to the copper 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 2124 aluminum and the bottom bar is CR020A copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
120
Elongation at Break, % 5.7
15
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 27
43
Tensile Strength: Ultimate (UTS), MPa 490
220
Tensile Strength: Yield (Proof), MPa 430
130

Thermal Properties

Latent Heat of Fusion, J/g 390
210
Maximum Temperature: Mechanical, °C 190
200
Melting Completion (Liquidus), °C 640
1090
Melting Onset (Solidus), °C 500
1040
Specific Heat Capacity, J/kg-K 880
390
Thermal Conductivity, W/m-K 150
380
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
100
Electrical Conductivity: Equal Weight (Specific), % IACS 110
100

Otherwise Unclassified Properties

Base Metal Price, % relative 10
31
Density, g/cm3 3.0
9.0
Embodied Carbon, kg CO2/kg material 8.2
2.6
Embodied Energy, MJ/kg 150
41
Embodied Water, L/kg 1150
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
29
Resilience: Unit (Modulus of Resilience), kJ/m3 1290
76
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 46
18
Strength to Weight: Axial, points 45
6.8
Strength to Weight: Bending, points 46
9.0
Thermal Diffusivity, mm2/s 58
110
Thermal Shock Resistance, points 21
7.8

Alloy Composition

Aluminum (Al), % 91.3 to 94.7
0
Bismuth (Bi), % 0
0 to 0.00050
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.8 to 4.9
99.95 to 99.999
Iron (Fe), % 0 to 0.3
0
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0.3 to 0.9
0
Phosphorus (P), % 0
0.0010 to 0.0060
Silicon (Si), % 0 to 0.2
0
Silver (Ag), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0