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AWS BVAg-18 vs. AWS BVAu-7

Both AWS BVAg-18 and AWS BVAu-7 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.

For each property being compared, the top bar is AWS BVAg-18 and the bottom bar is AWS BVAu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 82
130
Poisson's Ratio 0.36
0.38
Shear Modulus, GPa 30
45
Tensile Strength: Ultimate (UTS), MPa 180
200

Thermal Properties

Brazing Temperature, °C 720 to 840
1120 to 1150
Latent Heat of Fusion, J/g 140
140
Melting Completion (Liquidus), °C 720
1120
Melting Onset (Solidus), °C 600
1100
Specific Heat Capacity, J/kg-K 280
240
Thermal Expansion, µm/m-K 19
13

Otherwise Unclassified Properties

Density, g/cm3 9.7
15

Common Calculations

Stiffness to Weight: Axial, points 4.7
4.7
Stiffness to Weight: Bending, points 15
11
Strength to Weight: Axial, points 5.1
3.7
Strength to Weight: Bending, points 7.3
5.1
Thermal Shock Resistance, points 8.1
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), % 28.5 to 31.5
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), % 59 to 61
0
Tin (Sn), % 9.5 to 10.5
0
Zinc (Zn), % 0 to 0.0010
0 to 0.0010