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AWS BAu-3 vs. AWS BAu-1

Both AWS BAu-3 and AWS BAu-1 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is AWS BAu-3 and the bottom bar is AWS BAu-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Poisson's Ratio 0.37
0.37
Shear Modulus, GPa 41
40
Tensile Strength: Ultimate (UTS), MPa 220
210

Thermal Properties

Brazing Temperature, °C 1030 to 1090
1020 to 1090
Latent Heat of Fusion, J/g 160
150
Melting Completion (Liquidus), °C 1030
1020
Melting Onset (Solidus), °C 970
990
Specific Heat Capacity, J/kg-K 300
290
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Density, g/cm3 13
13

Common Calculations

Stiffness to Weight: Axial, points 5.0
4.7
Stiffness to Weight: Bending, points 13
12
Strength to Weight: Axial, points 4.9
4.5
Strength to Weight: Bending, points 6.4
6.1
Thermal Shock Resistance, points 8.7
8.5

Alloy Composition


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Copper (Cu), % 60.9 to 63
61.9 to 63
Gold (Au), % 34.5 to 35.5
37 to 38
Nickel (Ni), % 2.5 to 3.5
0
Residuals, % 0 to 0.15
0 to 0.15