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AWS BAg-7 vs. AWS BVAu-8

Both AWS BAg-7 and AWS BVAu-8 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. There are 16 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AWS BAg-7 and the bottom bar is AWS BVAu-8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
100
Poisson's Ratio 0.34
0.42
Shear Modulus, GPa 31
36
Tensile Strength: Ultimate (UTS), MPa 150
140

Thermal Properties

Brazing Temperature, °C 650 to 900
1240 to 1270
Latent Heat of Fusion, J/g 130
71
Melting Completion (Liquidus), °C 650
1240
Melting Onset (Solidus), °C 620
1200
Specific Heat Capacity, J/kg-K 290
140
Thermal Expansion, µm/m-K 20
14

Otherwise Unclassified Properties

Density, g/cm3 9.3
19

Common Calculations

Stiffness to Weight: Axial, points 4.9
3.0
Stiffness to Weight: Bending, points 16
8.3
Strength to Weight: Axial, points 4.5
2.1
Strength to Weight: Bending, points 6.7
3.2
Thermal Shock Resistance, points 6.4
7.1

Alloy Composition


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Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 0
0 to 0.0050
Copper (Cu), % 21 to 23
0
Gold (Au), % 0
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
Silver (Ag), % 55 to 57
0
Tin (Sn), % 4.5 to 5.5
0
Zinc (Zn), % 15 to 19
0 to 0.0010
Residuals, % 0 to 0.15
0