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C87500 Brass vs. 7021 Aluminum

C87500 brass belongs to the copper alloys classification, while 7021 aluminum belongs to the aluminum 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 C87500 brass and the bottom bar is 7021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
69
Elongation at Break, % 18
9.4
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 42
26
Tensile Strength: Ultimate (UTS), MPa 460
460
Tensile Strength: Yield (Proof), MPa 190
390

Thermal Properties

Latent Heat of Fusion, J/g 260
380
Maximum Temperature: Mechanical, °C 170
200
Melting Completion (Liquidus), °C 920
630
Melting Onset (Solidus), °C 820
510
Specific Heat Capacity, J/kg-K 410
870
Thermal Conductivity, W/m-K 28
150
Thermal Expansion, µm/m-K 18
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
38
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
120

Otherwise Unclassified Properties

Base Metal Price, % relative 27
9.5
Density, g/cm3 8.3
2.9
Embodied Carbon, kg CO2/kg material 2.7
8.3
Embodied Energy, MJ/kg 44
150
Embodied Water, L/kg 300
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67
41
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1110
Stiffness to Weight: Axial, points 7.4
13
Stiffness to Weight: Bending, points 19
47
Strength to Weight: Axial, points 16
44
Strength to Weight: Bending, points 16
45
Thermal Diffusivity, mm2/s 8.3
59
Thermal Shock Resistance, points 17
20

Alloy Composition

Aluminum (Al), % 0 to 0.5
90.7 to 93.7
Chromium (Cr), % 0
0 to 0.050
Copper (Cu), % 79 to 85
0 to 0.25
Iron (Fe), % 0
0 to 0.4
Lead (Pb), % 0 to 0.5
0
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0
0 to 0.1
Silicon (Si), % 3.0 to 5.0
0 to 0.25
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 12 to 16
5.0 to 6.0
Zirconium (Zr), % 0
0.080 to 0.18
Residuals, % 0
0 to 0.15