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7020 Aluminum vs. C95700 Bronze

7020 aluminum belongs to the aluminum alloys classification, while C95700 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 C95700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
130
Elongation at Break, % 8.4 to 14
23
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
47
Tensile Strength: Ultimate (UTS), MPa 190 to 390
680
Tensile Strength: Yield (Proof), MPa 120 to 310
310

Thermal Properties

Latent Heat of Fusion, J/g 380
230
Maximum Temperature: Mechanical, °C 210
220
Melting Completion (Liquidus), °C 650
990
Melting Onset (Solidus), °C 610
950
Specific Heat Capacity, J/kg-K 880
440
Thermal Conductivity, W/m-K 150
12
Thermal Expansion, µm/m-K 23
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
26
Density, g/cm3 2.9
8.2
Embodied Carbon, kg CO2/kg material 8.3
3.3
Embodied Energy, MJ/kg 150
54
Embodied Water, L/kg 1150
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
130
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
390
Stiffness to Weight: Axial, points 13
8.5
Stiffness to Weight: Bending, points 47
20
Strength to Weight: Axial, points 18 to 37
23
Strength to Weight: Bending, points 25 to 41
21
Thermal Diffusivity, mm2/s 59
3.3
Thermal Shock Resistance, points 8.3 to 17
21

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
7.0 to 8.5
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
71 to 78.5
Iron (Fe), % 0 to 0.4
2.0 to 4.0
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
11 to 14
Nickel (Ni), % 0
1.5 to 3.0
Silicon (Si), % 0 to 0.35
0 to 0.1
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
0 to 0.5