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AWS BAg-9 vs. AWS BAu-3

Both AWS BAg-9 and AWS BAu-3 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 (1, in this case) are not shown.

For each property being compared, the top bar is AWS BAg-9 and the bottom bar is AWS BAu-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 82
110
Poisson's Ratio 0.35
0.37
Shear Modulus, GPa 31
41
Tensile Strength: Ultimate (UTS), MPa 140
220

Thermal Properties

Brazing Temperature, °C 720 to 840
1030 to 1090
Latent Heat of Fusion, J/g 130
160
Melting Completion (Liquidus), °C 720
1030
Melting Onset (Solidus), °C 670
970
Specific Heat Capacity, J/kg-K 290
300
Thermal Expansion, µm/m-K 20
16

Otherwise Unclassified Properties

Density, g/cm3 9.6
13

Common Calculations

Stiffness to Weight: Axial, points 4.8
5.0
Stiffness to Weight: Bending, points 15
13
Strength to Weight: Axial, points 4.1
4.9
Strength to Weight: Bending, points 6.3
6.4
Thermal Shock Resistance, points 6.0
8.7

Alloy Composition


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Copper (Cu), % 19 to 21
60.9 to 63
Gold (Au), % 0
34.5 to 35.5
Nickel (Ni), % 0
2.5 to 3.5
Silver (Ag), % 64 to 66
0
Zinc (Zn), % 13 to 17
0
Residuals, % 0 to 0.15
0 to 0.15