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AWS BVAg-8 vs. AWS BVAu-7

Both AWS BVAg-8 and AWS BVAu-7 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 BVAg-8 and the bottom bar is AWS BVAu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 84
130
Poisson's Ratio 0.36
0.38
Shear Modulus, GPa 31
45
Tensile Strength: Ultimate (UTS), MPa 170
200

Thermal Properties

Brazing Temperature, °C 780 to 900
1120 to 1150
Latent Heat of Fusion, J/g 140
140
Melting Completion (Liquidus), °C 780
1120
Melting Onset (Solidus), °C 780
1100
Specific Heat Capacity, J/kg-K 280
240
Thermal Expansion, µm/m-K 19
13

Otherwise Unclassified Properties

Density, g/cm3 10
15

Common Calculations

Stiffness to Weight: Axial, points 4.6
4.7
Stiffness to Weight: Bending, points 14
11
Strength to Weight: Axial, points 4.7
3.7
Strength to Weight: Bending, points 6.8
5.1
Thermal Shock Resistance, points 7.6
8.9

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0 to 0.0010
Carbon (C), % 0 to 0.0050
0 to 0.0050
Cobalt (Co), % 0
0 to 0.060
Copper (Cu), % 27 to 29
0
Gold (Au), % 0
49.5 to 50.5
Lead (Pb), % 0 to 0.0020
0 to 0.0020
Nickel (Ni), % 0
24.5 to 25.5
Palladium (Pd), % 0
23.9 to 26
Phosphorus (P), % 0 to 0.0020
0 to 0.0020
Silver (Ag), % 71 to 73
0
Zinc (Zn), % 0 to 0.0010
0 to 0.0010