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7020 Aluminum vs. C47940 Brass

7020 aluminum belongs to the aluminum alloys classification, while C47940 brass belongs to the copper alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, 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 C47940 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
100
Elongation at Break, % 8.4 to 14
14 to 34
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 26
40
Shear Strength, MPa 110 to 230
250 to 310
Tensile Strength: Ultimate (UTS), MPa 190 to 390
380 to 520
Tensile Strength: Yield (Proof), MPa 120 to 310
160 to 390

Thermal Properties

Latent Heat of Fusion, J/g 380
170
Maximum Temperature: Mechanical, °C 210
130
Melting Completion (Liquidus), °C 650
850
Melting Onset (Solidus), °C 610
800
Specific Heat Capacity, J/kg-K 880
380
Thermal Conductivity, W/m-K 150
110
Thermal Expansion, µm/m-K 23
20

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
25
Density, g/cm3 2.9
8.2
Embodied Carbon, kg CO2/kg material 8.3
2.8
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 1150
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
68 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
120 to 740
Stiffness to Weight: Axial, points 13
7.1
Stiffness to Weight: Bending, points 47
19
Strength to Weight: Axial, points 18 to 37
13 to 17
Strength to Weight: Bending, points 25 to 41
14 to 17
Thermal Diffusivity, mm2/s 59
36
Thermal Shock Resistance, points 8.3 to 17
13 to 17

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
63 to 66
Iron (Fe), % 0 to 0.4
0.1 to 1.0
Lead (Pb), % 0
1.0 to 2.0
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
0
Nickel (Ni), % 0
0.1 to 0.5
Silicon (Si), % 0 to 0.35
0
Tin (Sn), % 0
1.2 to 2.0
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 4.0 to 5.0
28.1 to 34.6
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0
0 to 0.4