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8021 Aluminum vs. CC490K Brass

8021 aluminum belongs to the aluminum alloys classification, while CC490K 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 CC490K brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
110
Elongation at Break, % 2.3
15
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
40
Tensile Strength: Ultimate (UTS), MPa 160
230
Tensile Strength: Yield (Proof), MPa 130
110

Thermal Properties

Latent Heat of Fusion, J/g 400
190
Maximum Temperature: Mechanical, °C 170
160
Melting Completion (Liquidus), °C 650
980
Melting Onset (Solidus), °C 640
910
Specific Heat Capacity, J/kg-K 900
370
Thermal Conductivity, W/m-K 220
72
Thermal Expansion, µm/m-K 23
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
16
Electrical Conductivity: Equal Weight (Specific), % IACS 180
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
30
Density, g/cm3 2.8
8.8
Embodied Carbon, kg CO2/kg material 8.1
2.9
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 1180
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.4
28
Resilience: Unit (Modulus of Resilience), kJ/m3 130
54
Stiffness to Weight: Axial, points 14
6.8
Stiffness to Weight: Bending, points 49
18
Strength to Weight: Axial, points 16
7.3
Strength to Weight: Bending, points 23
9.5
Thermal Diffusivity, mm2/s 88
22
Thermal Shock Resistance, points 7.0
8.2

Alloy Composition

Aluminum (Al), % 98 to 98.8
0 to 0.010
Antimony (Sb), % 0
0 to 0.3
Copper (Cu), % 0 to 0.050
81 to 86
Iron (Fe), % 1.2 to 1.7
0 to 0.5
Lead (Pb), % 0
3.0 to 6.0
Nickel (Ni), % 0
0 to 2.0
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 0 to 0.15
0 to 0.010
Sulfur (S), % 0
0 to 0.1
Tin (Sn), % 0
2.0 to 3.5
Zinc (Zn), % 0
7.0 to 9.5
Residuals, % 0 to 0.15
0