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8021 Aluminum vs. C48500 Brass

8021 aluminum belongs to the aluminum alloys classification, while C48500 brass belongs to the copper 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 8021 aluminum and the bottom bar is C48500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
100
Elongation at Break, % 2.3
13 to 40
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 26
39
Tensile Strength: Ultimate (UTS), MPa 160
400 to 500
Tensile Strength: Yield (Proof), MPa 130
160 to 320

Thermal Properties

Latent Heat of Fusion, J/g 400
170
Maximum Temperature: Mechanical, °C 170
120
Melting Completion (Liquidus), °C 650
900
Melting Onset (Solidus), °C 640
890
Specific Heat Capacity, J/kg-K 900
380
Thermal Conductivity, W/m-K 220
120
Thermal Expansion, µm/m-K 23
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
26
Electrical Conductivity: Equal Weight (Specific), % IACS 180
29

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
23
Density, g/cm3 2.8
8.1
Embodied Carbon, kg CO2/kg material 8.1
2.7
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1180
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.4
56 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 130
120 to 500
Stiffness to Weight: Axial, points 14
7.1
Stiffness to Weight: Bending, points 49
19
Strength to Weight: Axial, points 16
14 to 17
Strength to Weight: Bending, points 23
15 to 17
Thermal Diffusivity, mm2/s 88
38
Thermal Shock Resistance, points 7.0
13 to 17

Alloy Composition


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Aluminum (Al), % 98 to 98.8
0
Copper (Cu), % 0 to 0.050
59 to 62
Iron (Fe), % 1.2 to 1.7
0 to 0.1
Lead (Pb), % 0
1.3 to 2.2
Silicon (Si), % 0 to 0.15
0
Tin (Sn), % 0
0.5 to 1.0
Zinc (Zn), % 0
34.3 to 39.2
Residuals, % 0 to 0.15
0 to 0.4