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C66900 Brass vs. AWS BAu-2

C66900 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 (15, 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 C66900 brass and the bottom bar is AWS BAu-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
100
Poisson's Ratio 0.32
0.4
Shear Modulus, GPa 45
36
Tensile Strength: Ultimate (UTS), MPa 460 to 770
150

Thermal Properties

Latent Heat of Fusion, J/g 190
92
Melting Completion (Liquidus), °C 860
890
Melting Onset (Solidus), °C 850
890
Specific Heat Capacity, J/kg-K 400
180
Thermal Expansion, µm/m-K 20
15

Otherwise Unclassified Properties

Density, g/cm3 8.2
17

Common Calculations

Stiffness to Weight: Axial, points 8.1
3.3
Stiffness to Weight: Bending, points 20
9.1
Strength to Weight: Axial, points 15 to 26
2.4
Strength to Weight: Bending, points 16 to 23
3.6
Thermal Shock Resistance, points 14 to 23
7.1

Alloy Composition

Copper (Cu), % 62.5 to 64.5
19.4 to 20.5
Gold (Au), % 0
79.5 to 80.5
Iron (Fe), % 0 to 0.25
0
Lead (Pb), % 0 to 0.050
0
Manganese (Mn), % 11.5 to 12.5
0
Zinc (Zn), % 22.5 to 26
0
Residuals, % 0
0 to 0.15