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7021 Aluminum vs. C95200 Bronze

7021 aluminum belongs to the aluminum alloys classification, while C95200 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 7021 aluminum and the bottom bar is C95200 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
110
Elongation at Break, % 9.4
29
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 26
42
Tensile Strength: Ultimate (UTS), MPa 460
520
Tensile Strength: Yield (Proof), MPa 390
190

Thermal Properties

Latent Heat of Fusion, J/g 380
230
Maximum Temperature: Mechanical, °C 200
220
Melting Completion (Liquidus), °C 630
1050
Melting Onset (Solidus), °C 510
1040
Specific Heat Capacity, J/kg-K 870
430
Thermal Conductivity, W/m-K 150
50
Thermal Expansion, µm/m-K 24
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
11
Electrical Conductivity: Equal Weight (Specific), % IACS 120
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
28
Density, g/cm3 2.9
8.3
Embodied Carbon, kg CO2/kg material 8.3
3.0
Embodied Energy, MJ/kg 150
50
Embodied Water, L/kg 1140
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
170
Stiffness to Weight: Axial, points 13
7.6
Stiffness to Weight: Bending, points 47
19
Strength to Weight: Axial, points 44
17
Strength to Weight: Bending, points 45
17
Thermal Diffusivity, mm2/s 59
14
Thermal Shock Resistance, points 20
19

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
86 to 89
Iron (Fe), % 0 to 0.4
2.5 to 4.0
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.1
0
Silicon (Si), % 0 to 0.25
0
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 1.0