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AWS BAg-20 vs. AWS BAg-37

Both AWS BAg-20 and AWS BAg-37 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 95% of their average alloy composition in common.

For each property being compared, the top bar is AWS BAg-20 and the bottom bar is AWS BAg-37.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 93
94
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 35
36
Tensile Strength: Ultimate (UTS), MPa 160
180

Thermal Properties

Brazing Temperature, °C 770 to 900
780 to 890
Latent Heat of Fusion, J/g 150
150
Melting Completion (Liquidus), °C 770
780
Melting Onset (Solidus), °C 680
690
Specific Heat Capacity, J/kg-K 340
350
Thermal Expansion, µm/m-K 21
21

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.5
Embodied Carbon, kg CO2/kg material 30
26
Embodied Energy, MJ/kg 480
410

Common Calculations

Stiffness to Weight: Axial, points 6.0
6.1
Stiffness to Weight: Bending, points 17
18
Strength to Weight: Axial, points 5.1
5.9
Strength to Weight: Bending, points 7.6
8.3
Thermal Shock Resistance, points 5.9
6.6

Alloy Composition


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Copper (Cu), % 37 to 39
39 to 41
Silver (Ag), % 29 to 31
24 to 26
Tin (Sn), % 0
1.5 to 2.5
Zinc (Zn), % 30 to 34
31 to 35
Residuals, % 0 to 0.15
0 to 0.15