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C21000 Brass vs. AWS BAu-2

C21000 brass belongs to the copper alloys classification, while AWS BAu-2 belongs to the otherwise unclassified metals. They have a modest 20% of their average alloy composition in common, which, by itself, doesn't mean much. There are 15 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is C21000 brass and the bottom bar is AWS BAu-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Poisson's Ratio 0.34
0.4
Shear Modulus, GPa 43
36
Tensile Strength: Ultimate (UTS), MPa 240 to 450
150

Thermal Properties

Latent Heat of Fusion, J/g 200
92
Melting Completion (Liquidus), °C 1070
890
Melting Onset (Solidus), °C 1050
890
Specific Heat Capacity, J/kg-K 390
180
Thermal Expansion, µm/m-K 18
15

Otherwise Unclassified Properties

Density, g/cm3 8.8
17

Common Calculations

Stiffness to Weight: Axial, points 7.2
3.3
Stiffness to Weight: Bending, points 18
9.1
Strength to Weight: Axial, points 7.4 to 14
2.4
Strength to Weight: Bending, points 9.6 to 15
3.6
Thermal Shock Resistance, points 8.1 to 15
7.1

Alloy Composition

Copper (Cu), % 94 to 96
19.4 to 20.5
Gold (Au), % 0
79.5 to 80.5
Iron (Fe), % 0 to 0.050
0
Lead (Pb), % 0 to 0.030
0
Zinc (Zn), % 3.7 to 6.0
0
Residuals, % 0
0 to 0.15