AWS BAu-2 vs. C70250 Copper
AWS BAu-2 belongs to the otherwise unclassified metals classification, while C70250 copper belongs to the copper alloys. 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 (10, in this case) are not shown.
For each property being compared, the top bar is AWS BAu-2 and the bottom bar is C70250 copper.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 120 |
| Poisson's Ratio | 0.4 | |
| 0.34 |
| Shear Modulus, GPa | 36 | |
| 44 |
| Tensile Strength: Ultimate (UTS), MPa | 150 | |
| 520 to 740 |
Thermal Properties
| Latent Heat of Fusion, J/g | 92 | |
| 220 |
| Melting Completion (Liquidus), °C | 890 | |
| 1100 |
| Melting Onset (Solidus), °C | 890 | |
| 1080 |
| Specific Heat Capacity, J/kg-K | 180 | |
| 390 |
| Thermal Expansion, µm/m-K | 15 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 8.9 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.3 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 9.1 | |
| 18 |
| Strength to Weight: Axial, points | 2.4 | |
| 16 to 23 |
| Strength to Weight: Bending, points | 3.6 | |
| 16 to 21 |
| Thermal Shock Resistance, points | 7.1 | |
| 18 to 26 |
Alloy Composition
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| Copper (Cu), % | 19.4 to 20.5 | |
| 92.7 to 97.5 |
| Gold (Au), % | 79.5 to 80.5 | |
| 0 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Magnesium (Mg), % | 0 | |
| 0.050 to 0.3 |
| Manganese (Mn), % | 0 | |
| 0 to 0.1 |
| Nickel (Ni), % | 0 | |
| 2.2 to 4.2 |
| Silicon (Si), % | 0 | |
| 0.25 to 1.2 |
| Zinc (Zn), % | 0 | |
| 0 to 1.0 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.5 |