ASTM B780 Alloy vs. AWS BVAu-2
Both ASTM B780 alloy and AWS BVAu-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 13 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is ASTM B780 alloy and the bottom bar is AWS BVAu-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 83 | |
| 100 |
| Poisson's Ratio | 0.36 | |
| 0.4 |
| Shear Modulus, GPa | 30 | |
| 36 |
| Tensile Strength: Ultimate (UTS), MPa | 330 to 590 | |
| 150 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 92 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 180 |
| Thermal Expansion, µm/m-K | 18 | |
| 15 |
Otherwise Unclassified Properties
| Density, g/cm3 | 10 | |
| 17 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.5 | |
| 3.3 |
| Stiffness to Weight: Bending, points | 14 | |
| 9.1 |
| Strength to Weight: Axial, points | 9.1 to 16 | |
| 2.4 |
| Strength to Weight: Bending, points | 11 to 15 | |
| 3.6 |
| Thermal Shock Resistance, points | 16 to 29 | |
| 7.1 |
Alloy Composition
| Cadmium (Cd), % | 0 to 0.050 | |
| 0 to 0.0010 |
| Carbon (C), % | 0 | |
| 0 to 0.0050 |
| Copper (Cu), % | 23.5 to 25.7 | |
| 19.5 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 to 0.0020 |
| Nickel (Ni), % | 0.35 to 0.65 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.0020 |
| Silver (Ag), % | 74 to 76 | |
| 0 |
| Zinc (Zn), % | 0 to 0.060 | |
| 0 to 0.0010 |