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AWS BVAu-4 vs. AWS BVAg-8b

Both AWS BVAu-4 and AWS BVAg-8b are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
84
Poisson's Ratio 0.4
0.36
Shear Modulus, GPa 41
31
Tensile Strength: Ultimate (UTS), MPa 190
170

Thermal Properties

Brazing Temperature, °C 950 to 1000
800 to 900
Latent Heat of Fusion, J/g 100
140
Melting Completion (Liquidus), °C 950
800
Melting Onset (Solidus), °C 950
780
Specific Heat Capacity, J/kg-K 190
280
Thermal Expansion, µm/m-K 14
19

Otherwise Unclassified Properties

Density, g/cm3 17
10

Common Calculations

Stiffness to Weight: Axial, points 3.6
4.7
Stiffness to Weight: Bending, points 9.3
15
Strength to Weight: Axial, points 3.0
4.7
Strength to Weight: Bending, points 4.2
6.8
Thermal Shock Resistance, points 8.7
7.6

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0 to 0.0010
Carbon (C), % 0 to 0.0050
0 to 0.0050
Copper (Cu), % 0
26.8 to 29.2
Gold (Au), % 81.5 to 82.5
0
Lead (Pb), % 0 to 0.0020
0 to 0.0020
Nickel (Ni), % 17.5 to 18.5
0.3 to 0.7
Phosphorus (P), % 0 to 0.0020
0 to 0.0020
Silver (Ag), % 0
70.5 to 72.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010