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AWS BAu-3 vs. AWS BAg-10

Both AWS BAu-3 and AWS BAg-10 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.

For each property being compared, the top bar is AWS BAu-3 and the bottom bar is AWS BAg-10.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
82
Poisson's Ratio 0.37
0.35
Shear Modulus, GPa 41
30
Tensile Strength: Ultimate (UTS), MPa 220
140

Thermal Properties

Brazing Temperature, °C 1030 to 1090
740 to 970
Latent Heat of Fusion, J/g 160
130
Melting Completion (Liquidus), °C 1030
740
Melting Onset (Solidus), °C 970
690
Specific Heat Capacity, J/kg-K 300
280
Thermal Expansion, µm/m-K 16
20

Otherwise Unclassified Properties

Density, g/cm3 13
9.8

Common Calculations

Stiffness to Weight: Axial, points 5.0
4.6
Stiffness to Weight: Bending, points 13
15
Strength to Weight: Axial, points 4.9
4.0
Strength to Weight: Bending, points 6.4
6.1
Thermal Shock Resistance, points 8.7
6.2

Alloy Composition


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Copper (Cu), % 60.9 to 63
19 to 21
Gold (Au), % 34.5 to 35.5
0
Nickel (Ni), % 2.5 to 3.5
0
Silver (Ag), % 0
69 to 71
Zinc (Zn), % 0
8.0 to 12
Residuals, % 0 to 0.15
0 to 0.15