AWS BAu-4 vs. AWS BAg-18
Both AWS BAu-4 and AWS BAg-18 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. There are 16 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is AWS BAu-4 and the bottom bar is AWS BAg-18.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 82 |
| Poisson's Ratio | 0.4 | |
| 0.36 |
| Shear Modulus, GPa | 41 | |
| 30 |
| Tensile Strength: Ultimate (UTS), MPa | 200 | |
| 170 |
Thermal Properties
| Brazing Temperature, °C | 950 to 1000 | |
| 720 to 980 |
| Latent Heat of Fusion, J/g | 100 | |
| 130 |
| Melting Completion (Liquidus), °C | 950 | |
| 720 |
| Melting Onset (Solidus), °C | 950 | |
| 600 |
| Specific Heat Capacity, J/kg-K | 190 | |
| 280 |
| Thermal Expansion, µm/m-K | 14 | |
| 19 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 9.7 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.6 | |
| 4.7 |
| Stiffness to Weight: Bending, points | 9.3 | |
| 15 |
| Strength to Weight: Axial, points | 3.2 | |
| 4.9 |
| Strength to Weight: Bending, points | 4.4 | |
| 7.0 |
| Thermal Shock Resistance, points | 9.2 | |
| 7.7 |
Alloy Composition
| Copper (Cu), % | 0 | |
| 28.4 to 31.5 |
| Gold (Au), % | 81.5 to 82.5 | |
| 0 |
| Nickel (Ni), % | 17.4 to 18.5 | |
| 0 |
| Silver (Ag), % | 0 | |
| 59 to 61 |
| Tin (Sn), % | 0 | |
| 9.5 to 10.5 |
| Residuals, % | 0 | |
| 0 to 0.15 |