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C61800 Bronze vs. AWS BAu-2

C61800 bronze 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. 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 C61800 bronze 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 44
36
Tensile Strength: Ultimate (UTS), MPa 740
150

Thermal Properties

Latent Heat of Fusion, J/g 230
92
Melting Completion (Liquidus), °C 1050
890
Melting Onset (Solidus), °C 1040
890
Specific Heat Capacity, J/kg-K 440
180
Thermal Expansion, µm/m-K 18
15

Otherwise Unclassified Properties

Density, g/cm3 8.3
17

Common Calculations

Stiffness to Weight: Axial, points 7.5
3.3
Stiffness to Weight: Bending, points 19
9.1
Strength to Weight: Axial, points 25
2.4
Strength to Weight: Bending, points 22
3.6
Thermal Shock Resistance, points 26
7.1

Alloy Composition

Aluminum (Al), % 8.5 to 11
0
Copper (Cu), % 86.9 to 91
19.4 to 20.5
Gold (Au), % 0
79.5 to 80.5
Iron (Fe), % 0.5 to 1.5
0
Lead (Pb), % 0 to 0.020
0
Silicon (Si), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.020
0
Residuals, % 0
0 to 0.15