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AWS BVAu-2 vs. AWS BVAg-18

Both AWS BVAu-2 and AWS BVAg-18 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a modest 20% of their average alloy composition in common, which, by itself, doesn't mean much. 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 BVAu-2 and the bottom bar is AWS BVAg-18.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
82
Poisson's Ratio 0.4
0.36
Shear Modulus, GPa 36
30
Tensile Strength: Ultimate (UTS), MPa 150
180

Thermal Properties

Brazing Temperature, °C 890 to 1010
720 to 840
Latent Heat of Fusion, J/g 92
140
Melting Completion (Liquidus), °C 890
720
Melting Onset (Solidus), °C 890
600
Specific Heat Capacity, J/kg-K 180
280
Thermal Expansion, µm/m-K 15
19

Otherwise Unclassified Properties

Density, g/cm3 17
9.7

Common Calculations

Stiffness to Weight: Axial, points 3.3
4.7
Stiffness to Weight: Bending, points 9.1
15
Strength to Weight: Axial, points 2.4
5.1
Strength to Weight: Bending, points 3.6
7.3
Thermal Shock Resistance, points 7.1
8.1

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0 to 0.0010
Carbon (C), % 0 to 0.0050
0 to 0.0050
Copper (Cu), % 19.5 to 20.5
28.5 to 31.5
Gold (Au), % 79.5 to 80.5
0
Lead (Pb), % 0 to 0.0020
0 to 0.0020
Phosphorus (P), % 0 to 0.0020
0 to 0.0020
Silver (Ag), % 0
59 to 61
Tin (Sn), % 0
9.5 to 10.5
Zinc (Zn), % 0 to 0.0010
0 to 0.0010