ASTM B685 Alloy vs. AWS BAu-2
Both ASTM B685 alloy and AWS BAu-2 are otherwise unclassified metals. They have a modest 20% of their average alloy composition in common, which, by itself, doesn't mean much. There are 15 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is ASTM B685 alloy and the bottom bar is AWS BAu-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 100 |
| Poisson's Ratio | 0.37 | |
| 0.4 |
| Shear Modulus, GPa | 43 | |
| 36 |
| Tensile Strength: Ultimate (UTS), MPa | 660 to 1060 | |
| 150 |
Thermal Properties
| Latent Heat of Fusion, J/g | 180 | |
| 92 |
| Melting Completion (Liquidus), °C | 1230 | |
| 890 |
| Melting Onset (Solidus), °C | 1200 | |
| 890 |
| Specific Heat Capacity, J/kg-K | 300 | |
| 180 |
| Thermal Expansion, µm/m-K | 14 | |
| 15 |
Otherwise Unclassified Properties
| Density, g/cm3 | 11 | |
| 17 |
Common Calculations
| Stiffness to Weight: Axial, points | 6.1 | |
| 3.3 |
| Stiffness to Weight: Bending, points | 15 | |
| 9.1 |
| Strength to Weight: Axial, points | 17 to 27 | |
| 2.4 |
| Strength to Weight: Bending, points | 16 to 21 | |
| 3.6 |
| Thermal Shock Resistance, points | 28 to 46 | |
| 7.1 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0050 | |
| 0 |
| Cadmium (Cd), % | 0 to 0.050 | |
| 0 |
| Copper (Cu), % | 39.5 to 40.5 | |
| 19.4 to 20.5 |
| Gold (Au), % | 0 | |
| 79.5 to 80.5 |
| Iron (Fe), % | 0 to 0.050 | |
| 0 |
| Lead (Pb), % | 0 to 0.030 | |
| 0 |
| Palladium (Pd), % | 59 to 60.5 | |
| 0 |
| Silver (Ag), % | 0 to 0.1 | |
| 0 |
| Zinc (Zn), % | 0 to 0.060 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.15 |