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ASTM B628 Ag-Cu vs. AWS BAu-2

Both ASTM B628 Ag-Cu and AWS BAu-2 are 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 (5, in this case) are not shown.

For each property being compared, the top bar is ASTM B628 Ag-Cu and the bottom bar is AWS BAu-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
100
Poisson's Ratio 0.36
0.4
Shear Modulus, GPa 31
36
Tensile Strength: Ultimate (UTS), MPa 350 to 760
150

Thermal Properties

Latent Heat of Fusion, J/g 140
92
Melting Completion (Liquidus), °C 780
890
Melting Onset (Solidus), °C 780
890
Specific Heat Capacity, J/kg-K 280
180
Thermal Expansion, µm/m-K 19
15

Otherwise Unclassified Properties

Density, g/cm3 10
17

Common Calculations

Stiffness to Weight: Axial, points 4.6
3.3
Stiffness to Weight: Bending, points 14
9.1
Strength to Weight: Axial, points 9.5 to 21
2.4
Strength to Weight: Bending, points 11 to 18
3.6
Thermal Shock Resistance, points 16 to 34
7.1

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 26.6 to 29
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
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.030
0
Silver (Ag), % 71 to 73
0
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0
0 to 0.15