ASTM B522 Class I vs. AWS BAu-3
Both ASTM B522 class I and AWS BAu-3 are otherwise unclassified metals. They have a modest 35% 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 (9, in this case) are not shown.
For each property being compared, the top bar is ASTM B522 class I and the bottom bar is AWS BAu-3.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 96 | |
| 110 |
| Poisson's Ratio | 0.41 | |
| 0.37 |
| Shear Modulus, GPa | 34 | |
| 41 |
| Tensile Strength: Ultimate (UTS), MPa | 280 to 490 | |
| 220 |
Thermal Properties
| Latent Heat of Fusion, J/g | 77 | |
| 160 |
| Melting Completion (Liquidus), °C | 1030 | |
| 1030 |
| Melting Onset (Solidus), °C | 1030 | |
| 970 |
| Specific Heat Capacity, J/kg-K | 160 | |
| 300 |
| Thermal Expansion, µm/m-K | 15 | |
| 16 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 13 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.1 | |
| 5.0 |
| Stiffness to Weight: Bending, points | 8.9 | |
| 13 |
| Strength to Weight: Axial, points | 4.4 to 7.8 | |
| 4.9 |
| Strength to Weight: Bending, points | 5.5 to 8.0 | |
| 6.4 |
| Thermal Shock Resistance, points | 13 to 24 | |
| 8.7 |
Alloy Composition
| Copper (Cu), % | 0 | |
| 60.9 to 63 |
| Gold (Au), % | 68 to 70 | |
| 34.5 to 35.5 |
| Nickel (Ni), % | 0 | |
| 2.5 to 3.5 |
| Platinum (Pt), % | 5.0 to 7.0 | |
| 0 |
| Silver (Ag), % | 23.5 to 26.5 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.15 |