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7020 Aluminum vs. C86400 Bronze

7020 aluminum belongs to the aluminum alloys classification, while C86400 bronze 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 C86400 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
100
Elongation at Break, % 8.4 to 14
17
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 26
40
Tensile Strength: Ultimate (UTS), MPa 190 to 390
470
Tensile Strength: Yield (Proof), MPa 120 to 310
150

Thermal Properties

Latent Heat of Fusion, J/g 380
170
Maximum Temperature: Mechanical, °C 210
120
Melting Completion (Liquidus), °C 650
880
Melting Onset (Solidus), °C 610
860
Specific Heat Capacity, J/kg-K 880
390
Thermal Conductivity, W/m-K 150
88
Thermal Expansion, µm/m-K 23
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
19
Electrical Conductivity: Equal Weight (Specific), % IACS 120
22

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
23
Density, g/cm3 2.9
7.9
Embodied Carbon, kg CO2/kg material 8.3
2.8
Embodied Energy, MJ/kg 150
48
Embodied Water, L/kg 1150
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
63
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
110
Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 47
20
Strength to Weight: Axial, points 18 to 37
16
Strength to Weight: Bending, points 25 to 41
17
Thermal Diffusivity, mm2/s 59
29
Thermal Shock Resistance, points 8.3 to 17
16

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0.5 to 1.5
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
56 to 62
Iron (Fe), % 0 to 0.4
0.4 to 2.0
Lead (Pb), % 0
0.5 to 1.5
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
0.1 to 1.0
Nickel (Ni), % 0
0 to 1.0
Silicon (Si), % 0 to 0.35
0
Tin (Sn), % 0
0.5 to 1.5
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 4.0 to 5.0
34 to 42
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0
0 to 1.0