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7021 Aluminum vs. C34500 Brass

7021 aluminum belongs to the aluminum alloys classification, while C34500 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (1, 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 C34500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
100
Elongation at Break, % 9.4
12 to 28
Poisson's Ratio 0.32
0.31
Shear Modulus, GPa 26
40
Shear Strength, MPa 270
220 to 260
Tensile Strength: Ultimate (UTS), MPa 460
340 to 430
Tensile Strength: Yield (Proof), MPa 390
120 to 180

Thermal Properties

Latent Heat of Fusion, J/g 380
170
Maximum Temperature: Mechanical, °C 200
120
Melting Completion (Liquidus), °C 630
910
Melting Onset (Solidus), °C 510
890
Specific Heat Capacity, J/kg-K 870
380
Thermal Conductivity, W/m-K 150
120
Thermal Expansion, µm/m-K 24
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
26
Electrical Conductivity: Equal Weight (Specific), % IACS 120
29

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
24
Density, g/cm3 2.9
8.2
Embodied Carbon, kg CO2/kg material 8.3
2.6
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1140
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
42 to 75
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
69 to 160
Stiffness to Weight: Axial, points 13
7.1
Stiffness to Weight: Bending, points 47
19
Strength to Weight: Axial, points 44
12 to 15
Strength to Weight: Bending, points 45
13 to 16
Thermal Diffusivity, mm2/s 59
37
Thermal Shock Resistance, points 20
11 to 14

Alloy Composition

Aluminum (Al), % 90.7 to 93.7
0
Chromium (Cr), % 0 to 0.050
0
Copper (Cu), % 0 to 0.25
62 to 65
Iron (Fe), % 0 to 0.4
0 to 0.15
Lead (Pb), % 0
1.5 to 2.5
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
32 to 36.5
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0
0 to 0.4