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AWS BAu-1 vs. AWS BAg-7

Both AWS BAu-1 and AWS BAg-7 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a modest 22% 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 BAu-1 and the bottom bar is AWS BAg-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
83
Poisson's Ratio 0.37
0.34
Shear Modulus, GPa 40
31
Tensile Strength: Ultimate (UTS), MPa 210
150

Thermal Properties

Brazing Temperature, °C 1020 to 1090
650 to 900
Latent Heat of Fusion, J/g 150
130
Melting Completion (Liquidus), °C 1020
650
Melting Onset (Solidus), °C 990
620
Specific Heat Capacity, J/kg-K 290
290
Thermal Expansion, µm/m-K 16
20

Otherwise Unclassified Properties

Density, g/cm3 13
9.3

Common Calculations

Stiffness to Weight: Axial, points 4.7
4.9
Stiffness to Weight: Bending, points 12
16
Strength to Weight: Axial, points 4.5
4.5
Strength to Weight: Bending, points 6.1
6.7
Thermal Shock Resistance, points 8.5
6.4

Alloy Composition


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Copper (Cu), % 61.9 to 63
21 to 23
Gold (Au), % 37 to 38
0
Silver (Ag), % 0
55 to 57
Tin (Sn), % 0
4.5 to 5.5
Zinc (Zn), % 0
15 to 19
Residuals, % 0 to 0.15
0 to 0.15