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7020 Aluminum vs. C90700 Bronze

7020 aluminum belongs to the aluminum alloys classification, while C90700 bronze belongs to the copper alloys. There are 29 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 7020 aluminum and the bottom bar is C90700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 45 to 100
90
Elastic (Young's, Tensile) Modulus, GPa 70
110
Elongation at Break, % 8.4 to 14
12
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
40
Tensile Strength: Ultimate (UTS), MPa 190 to 390
330
Tensile Strength: Yield (Proof), MPa 120 to 310
180

Thermal Properties

Latent Heat of Fusion, J/g 380
190
Maximum Temperature: Mechanical, °C 210
170
Melting Completion (Liquidus), °C 650
1000
Melting Onset (Solidus), °C 610
830
Specific Heat Capacity, J/kg-K 880
370
Thermal Conductivity, W/m-K 150
71
Thermal Expansion, µm/m-K 23
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
10
Electrical Conductivity: Equal Weight (Specific), % IACS 120
10

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
35
Density, g/cm3 2.9
8.7
Embodied Carbon, kg CO2/kg material 8.3
3.7
Embodied Energy, MJ/kg 150
60
Embodied Water, L/kg 1150
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
34
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
150
Stiffness to Weight: Axial, points 13
6.9
Stiffness to Weight: Bending, points 47
18
Strength to Weight: Axial, points 18 to 37
10
Strength to Weight: Bending, points 25 to 41
12
Thermal Diffusivity, mm2/s 59
22
Thermal Shock Resistance, points 8.3 to 17
12

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0 to 0.0050
Antimony (Sb), % 0
0 to 0.2
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
88 to 90
Iron (Fe), % 0 to 0.4
0 to 0.15
Lead (Pb), % 0
0 to 0.5
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
0
Nickel (Ni), % 0
0 to 0.5
Phosphorus (P), % 0
0 to 1.5
Silicon (Si), % 0 to 0.35
0 to 0.0050
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
10 to 12
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 4.0 to 5.0
0 to 0.5
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0
0 to 0.6