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AWS BAu-2 vs. C38000 Brass

AWS BAu-2 belongs to the otherwise unclassified metals classification, while C38000 brass belongs to the copper alloys. 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 (13, 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 AWS BAu-2 and the bottom bar is C38000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
100
Poisson's Ratio 0.4
0.31
Shear Modulus, GPa 36
39
Tensile Strength: Ultimate (UTS), MPa 150
380

Thermal Properties

Latent Heat of Fusion, J/g 92
170
Melting Completion (Liquidus), °C 890
800
Melting Onset (Solidus), °C 890
760
Specific Heat Capacity, J/kg-K 180
380
Thermal Expansion, µm/m-K 15
21

Otherwise Unclassified Properties

Density, g/cm3 17
8.0

Common Calculations

Stiffness to Weight: Axial, points 3.3
7.1
Stiffness to Weight: Bending, points 9.1
19
Strength to Weight: Axial, points 2.4
13
Strength to Weight: Bending, points 3.6
14
Thermal Shock Resistance, points 7.1
13

Alloy Composition

Aluminum (Al), % 0
0 to 0.5
Copper (Cu), % 19.4 to 20.5
55 to 60
Gold (Au), % 79.5 to 80.5
0
Iron (Fe), % 0
0 to 0.35
Lead (Pb), % 0
1.5 to 2.5
Tin (Sn), % 0
0 to 0.3
Zinc (Zn), % 0
35.9 to 43.5
Residuals, % 0
0 to 0.5