AWS BAu-1 vs. AWS BVAu-4
Both AWS BAu-1 and AWS BVAu-4 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a modest 38% 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-1 and the bottom bar is AWS BVAu-4.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 110 |
| Poisson's Ratio | 0.37 | |
| 0.4 |
| Shear Modulus, GPa | 40 | |
| 41 |
| Tensile Strength: Ultimate (UTS), MPa | 210 | |
| 190 |
Thermal Properties
| Brazing Temperature, °C | 1020 to 1090 | |
| 950 to 1000 |
| Latent Heat of Fusion, J/g | 150 | |
| 100 |
| Melting Completion (Liquidus), °C | 1020 | |
| 950 |
| Melting Onset (Solidus), °C | 990 | |
| 950 |
| Specific Heat Capacity, J/kg-K | 290 | |
| 190 |
| Thermal Expansion, µm/m-K | 16 | |
| 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 | |
| 17 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.7 | |
| 3.6 |
| Stiffness to Weight: Bending, points | 12 | |
| 9.3 |
| Strength to Weight: Axial, points | 4.5 | |
| 3.0 |
| Strength to Weight: Bending, points | 6.1 | |
| 4.2 |
| Thermal Shock Resistance, points | 8.5 | |
| 8.7 |
Alloy Composition
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| Cadmium (Cd), % | 0 | |
| 0 to 0.0010 |
| Carbon (C), % | 0 | |
| 0 to 0.0050 |
| Copper (Cu), % | 61.9 to 63 | |
| 0 |
| Gold (Au), % | 37 to 38 | |
| 81.5 to 82.5 |
| Lead (Pb), % | 0 | |
| 0 to 0.0020 |
| Nickel (Ni), % | 0 | |
| 17.5 to 18.5 |
| Phosphorus (P), % | 0 | |
| 0 to 0.0020 |
| Zinc (Zn), % | 0 | |
| 0 to 0.0010 |
| Residuals, % | 0 to 0.15 | |
| 0 |