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7020 Aluminum vs. CR024A Copper

7020 aluminum belongs to the aluminum alloys classification, while CR024A copper belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 7020 aluminum and the bottom bar is CR024A copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
120
Elongation at Break, % 8.4 to 14
15
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
43
Tensile Strength: Ultimate (UTS), MPa 190 to 390
230
Tensile Strength: Yield (Proof), MPa 120 to 310
140

Thermal Properties

Latent Heat of Fusion, J/g 380
210
Maximum Temperature: Mechanical, °C 210
200
Melting Completion (Liquidus), °C 650
1090
Melting Onset (Solidus), °C 610
1040
Specific Heat Capacity, J/kg-K 880
390
Thermal Conductivity, W/m-K 150
370
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
100
Electrical Conductivity: Equal Weight (Specific), % IACS 120
100

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
31
Density, g/cm3 2.9
9.0
Embodied Carbon, kg CO2/kg material 8.3
2.6
Embodied Energy, MJ/kg 150
41
Embodied Water, L/kg 1150
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
31
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
83
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 47
18
Strength to Weight: Axial, points 18 to 37
7.1
Strength to Weight: Bending, points 25 to 41
9.3
Thermal Diffusivity, mm2/s 59
110
Thermal Shock Resistance, points 8.3 to 17
8.1

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
99.9 to 99.985
Iron (Fe), % 0 to 0.4
0
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
0
Phosphorus (P), % 0
0.015 to 0.040
Silicon (Si), % 0 to 0.35
0
Silver (Ag), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0 to 0.15
0