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7021 Aluminum vs. C69710 Brass

7021 aluminum belongs to the aluminum alloys classification, while C69710 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 C69710 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
110
Elongation at Break, % 9.4
25
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 26
41
Shear Strength, MPa 270
300
Tensile Strength: Ultimate (UTS), MPa 460
470
Tensile Strength: Yield (Proof), MPa 390
230

Thermal Properties

Latent Heat of Fusion, J/g 380
240
Maximum Temperature: Mechanical, °C 200
160
Melting Completion (Liquidus), °C 630
930
Melting Onset (Solidus), °C 510
880
Specific Heat Capacity, J/kg-K 870
400
Thermal Conductivity, W/m-K 150
40
Thermal Expansion, µm/m-K 24
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
26
Density, g/cm3 2.9
8.3
Embodied Carbon, kg CO2/kg material 8.3
2.7
Embodied Energy, MJ/kg 150
44
Embodied Water, L/kg 1140
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
99
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
250
Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 47
19
Strength to Weight: Axial, points 44
16
Strength to Weight: Bending, points 45
16
Thermal Diffusivity, mm2/s 59
12
Thermal Shock Resistance, points 20
16

Alloy Composition

Aluminum (Al), % 90.7 to 93.7
0
Arsenic (As), % 0
0.030 to 0.060
Chromium (Cr), % 0 to 0.050
0
Copper (Cu), % 0 to 0.25
75 to 80
Iron (Fe), % 0 to 0.4
0 to 0.2
Lead (Pb), % 0
0.5 to 1.5
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.1
0 to 0.4
Silicon (Si), % 0 to 0.25
2.5 to 3.5
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 5.0 to 6.0
13.8 to 22
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0
0 to 0.5