AWS BAu-3 vs. AWS BAg-21
Both AWS BAu-3 and AWS BAg-21 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a modest 31% 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 BAu-3 and the bottom bar is AWS BAg-21.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 85 |
| Poisson's Ratio | 0.37 | |
| 0.36 |
| Shear Modulus, GPa | 41 | |
| 31 |
| Tensile Strength: Ultimate (UTS), MPa | 220 | |
| 150 |
Thermal Properties
| Brazing Temperature, °C | 1030 to 1090 | |
| 700 to 900 |
| Latent Heat of Fusion, J/g | 160 | |
| 140 |
| Melting Completion (Liquidus), °C | 1030 | |
| 800 |
| Melting Onset (Solidus), °C | 970 | |
| 690 |
| Specific Heat Capacity, J/kg-K | 300 | |
| 280 |
| Thermal Expansion, µm/m-K | 16 | |
| 19 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 9.8 |
Common Calculations
| Stiffness to Weight: Axial, points | 5.0 | |
| 4.8 |
| Stiffness to Weight: Bending, points | 13 | |
| 15 |
| Strength to Weight: Axial, points | 4.9 | |
| 4.2 |
| Strength to Weight: Bending, points | 6.4 | |
| 6.4 |
| Thermal Shock Resistance, points | 8.7 | |
| 6.6 |
Alloy Composition
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| Copper (Cu), % | 60.9 to 63 | |
| 27.5 to 29.5 |
| Gold (Au), % | 34.5 to 35.5 | |
| 0 |
| Nickel (Ni), % | 2.5 to 3.5 | |
| 2.0 to 3.0 |
| Silver (Ag), % | 0 | |
| 62 to 64 |
| Tin (Sn), % | 0 | |
| 5.0 to 7.0 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.15 |