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AWS BVAg-18 vs. AWS BVAu-4

Both AWS BVAg-18 and AWS BVAu-4 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-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 82
110
Poisson's Ratio 0.36
0.4
Shear Modulus, GPa 30
41
Tensile Strength: Ultimate (UTS), MPa 180
190

Thermal Properties

Brazing Temperature, °C 720 to 840
950 to 1000
Latent Heat of Fusion, J/g 140
100
Melting Completion (Liquidus), °C 720
950
Melting Onset (Solidus), °C 600
950
Specific Heat Capacity, J/kg-K 280
190
Thermal Expansion, µm/m-K 19
14

Otherwise Unclassified Properties

Density, g/cm3 9.7
17

Common Calculations

Stiffness to Weight: Axial, points 4.7
3.6
Stiffness to Weight: Bending, points 15
9.3
Strength to Weight: Axial, points 5.1
3.0
Strength to Weight: Bending, points 7.3
4.2
Thermal Shock Resistance, points 8.1
8.7

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0 to 0.0010
Carbon (C), % 0 to 0.0050
0 to 0.0050
Copper (Cu), % 28.5 to 31.5
0
Gold (Au), % 0
81.5 to 82.5
Lead (Pb), % 0 to 0.0020
0 to 0.0020
Nickel (Ni), % 0
17.5 to 18.5
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