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7021 Aluminum vs. C95800 Bronze

7021 aluminum belongs to the aluminum alloys classification, while C95800 bronze 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 7021 aluminum and the bottom bar is C95800 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
120
Elongation at Break, % 9.4
22
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 26
44
Tensile Strength: Ultimate (UTS), MPa 460
660
Tensile Strength: Yield (Proof), MPa 390
270

Thermal Properties

Latent Heat of Fusion, J/g 380
230
Maximum Temperature: Mechanical, °C 200
230
Melting Completion (Liquidus), °C 630
1060
Melting Onset (Solidus), °C 510
1040
Specific Heat Capacity, J/kg-K 870
440
Thermal Conductivity, W/m-K 150
36
Thermal Expansion, µm/m-K 24
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
7.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
29
Density, g/cm3 2.9
8.3
Embodied Carbon, kg CO2/kg material 8.3
3.4
Embodied Energy, MJ/kg 150
55
Embodied Water, L/kg 1140
370

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
310
Stiffness to Weight: Axial, points 13
7.9
Stiffness to Weight: Bending, points 47
20
Strength to Weight: Axial, points 44
22
Strength to Weight: Bending, points 45
20
Thermal Diffusivity, mm2/s 59
9.9
Thermal Shock Resistance, points 20
23

Alloy Composition

Aluminum (Al), % 90.7 to 93.7
8.5 to 9.5
Chromium (Cr), % 0 to 0.050
0
Copper (Cu), % 0 to 0.25
79 to 83.2
Iron (Fe), % 0 to 0.4
3.5 to 4.5
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.1
0.8 to 1.5
Nickel (Ni), % 0
4.0 to 5.0
Silicon (Si), % 0 to 0.25
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 5.0 to 6.0
0
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0
0 to 0.5