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AWS BAu-1 vs. AWS BVAg-31

Both AWS BAu-1 and AWS BVAg-31 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much.

For each property being compared, the top bar is AWS BAu-1 and the bottom bar is AWS BVAg-31.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
90
Poisson's Ratio 0.37
0.36
Shear Modulus, GPa 40
33
Tensile Strength: Ultimate (UTS), MPa 210
180

Thermal Properties

Brazing Temperature, °C 1020 to 1090
850 to 890
Latent Heat of Fusion, J/g 150
150
Melting Completion (Liquidus), °C 1020
850
Melting Onset (Solidus), °C 990
820
Specific Heat Capacity, J/kg-K 290
280
Thermal Expansion, µm/m-K 16
18

Otherwise Unclassified Properties

Density, g/cm3 13
10

Common Calculations

Stiffness to Weight: Axial, points 4.7
4.9
Stiffness to Weight: Bending, points 12
15
Strength to Weight: Axial, points 4.5
4.9
Strength to Weight: Bending, points 6.1
7.0
Thermal Shock Resistance, points 8.5
7.8

Alloy Composition


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Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 0
0 to 0.0050
Copper (Cu), % 61.9 to 63
31 to 33
Gold (Au), % 37 to 38
0
Lead (Pb), % 0
0 to 0.0020
Palladium (Pd), % 0
8.0 to 12
Phosphorus (P), % 0
0 to 0.0020
Silver (Ag), % 0
57 to 59
Zinc (Zn), % 0
0 to 0.0010
Residuals, % 0 to 0.15
0