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AWS BAu-1 vs. AWS BVAu-8

Both AWS BAu-1 and AWS BVAu-8 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a modest 38% 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 BVAu-8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Poisson's Ratio 0.37
0.42
Shear Modulus, GPa 40
36
Tensile Strength: Ultimate (UTS), MPa 210
140

Thermal Properties

Brazing Temperature, °C 1020 to 1090
1240 to 1270
Latent Heat of Fusion, J/g 150
71
Melting Completion (Liquidus), °C 1020
1240
Melting Onset (Solidus), °C 990
1200
Specific Heat Capacity, J/kg-K 290
140
Thermal Expansion, µm/m-K 16
14

Otherwise Unclassified Properties

Density, g/cm3 13
19

Common Calculations

Stiffness to Weight: Axial, points 4.7
3.0
Stiffness to Weight: Bending, points 12
8.3
Strength to Weight: Axial, points 4.5
2.1
Strength to Weight: Bending, points 6.1
3.2
Thermal Shock Resistance, points 8.5
7.1

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
0
Gold (Au), % 37 to 38
91 to 93
Lead (Pb), % 0
0 to 0.0020
Palladium (Pd), % 0
7.0 to 9.0
Phosphorus (P), % 0
0 to 0.0020
Zinc (Zn), % 0
0 to 0.0010
Residuals, % 0 to 0.15
0