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AWS BVAu-8 vs. AWS BVAu-4

Both AWS BVAu-8 and AWS BVAu-4 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 82% of their average alloy composition in common.

For each property being compared, the top bar is AWS BVAu-8 and the bottom bar is AWS BVAu-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
110
Poisson's Ratio 0.42
0.4
Shear Modulus, GPa 36
41
Tensile Strength: Ultimate (UTS), MPa 140
190

Thermal Properties

Brazing Temperature, °C 1240 to 1270
950 to 1000
Latent Heat of Fusion, J/g 71
100
Melting Completion (Liquidus), °C 1240
950
Melting Onset (Solidus), °C 1200
950
Specific Heat Capacity, J/kg-K 140
190
Thermal Expansion, µm/m-K 14
14

Otherwise Unclassified Properties

Density, g/cm3 19
17

Common Calculations

Stiffness to Weight: Axial, points 3.0
3.6
Stiffness to Weight: Bending, points 8.3
9.3
Strength to Weight: Axial, points 2.1
3.0
Strength to Weight: Bending, points 3.2
4.2
Thermal Shock Resistance, points 7.1
8.7

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0 to 0.0010
Carbon (C), % 0 to 0.0050
0 to 0.0050
Gold (Au), % 91 to 93
81.5 to 82.5
Lead (Pb), % 0 to 0.0020
0 to 0.0020
Nickel (Ni), % 0
17.5 to 18.5
Palladium (Pd), % 7.0 to 9.0
0
Phosphorus (P), % 0 to 0.0020
0 to 0.0020
Zinc (Zn), % 0 to 0.0010
0 to 0.0010