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C69430 Brass vs. AWS BAu-4

C69430 brass belongs to the copper alloys classification, while AWS BAu-4 belongs to the otherwise unclassified metals. 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 C69430 brass and the bottom bar is AWS BAu-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Poisson's Ratio 0.33
0.4
Shear Modulus, GPa 42
41
Tensile Strength: Ultimate (UTS), MPa 570
200

Thermal Properties

Latent Heat of Fusion, J/g 260
100
Melting Completion (Liquidus), °C 920
950
Melting Onset (Solidus), °C 820
950
Specific Heat Capacity, J/kg-K 410
190
Thermal Expansion, µm/m-K 18
14

Otherwise Unclassified Properties

Density, g/cm3 8.3
17

Common Calculations

Stiffness to Weight: Axial, points 7.4
3.6
Stiffness to Weight: Bending, points 19
9.3
Strength to Weight: Axial, points 19
3.2
Strength to Weight: Bending, points 18
4.4
Thermal Shock Resistance, points 20
9.2

Alloy Composition

Arsenic (As), % 0.030 to 0.060
0
Copper (Cu), % 80 to 83
0
Gold (Au), % 0
81.5 to 82.5
Iron (Fe), % 0 to 0.2
0
Lead (Pb), % 0 to 0.3
0
Nickel (Ni), % 0
17.4 to 18.5
Silicon (Si), % 3.5 to 4.5
0
Zinc (Zn), % 11.4 to 16.5
0
Residuals, % 0
0 to 0.15