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AWS BAu-1 vs. ASTM B628 Ag-Cu

Both AWS BAu-1 and ASTM B628 Ag-Cu are otherwise unclassified metals. They have a modest 28% 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 AWS BAu-1 and the bottom bar is ASTM B628 Ag-Cu.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
83
Poisson's Ratio 0.37
0.36
Shear Modulus, GPa 40
31
Tensile Strength: Ultimate (UTS), MPa 210
350 to 760

Thermal Properties

Latent Heat of Fusion, J/g 150
140
Melting Completion (Liquidus), °C 1020
780
Melting Onset (Solidus), °C 990
780
Specific Heat Capacity, J/kg-K 290
280
Thermal Expansion, µm/m-K 16
19

Otherwise Unclassified Properties

Density, g/cm3 13
10

Common Calculations

Stiffness to Weight: Axial, points 4.7
4.6
Stiffness to Weight: Bending, points 12
14
Strength to Weight: Axial, points 4.5
9.5 to 21
Strength to Weight: Bending, points 6.1
11 to 18
Thermal Shock Resistance, points 8.5
16 to 34

Alloy Composition


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Aluminum (Al), % 0
0 to 0.0050
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 61.9 to 63
26.6 to 29
Gold (Au), % 37 to 38
0
Iron (Fe), % 0
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0
0 to 0.030
Silver (Ag), % 0
71 to 73
Zinc (Zn), % 0
0 to 0.060
Residuals, % 0 to 0.15
0 to 0.21