ASTM B477 Au-Ni-Ag vs. C70620 Copper-nickel
ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while C70620 copper-nickel belongs to the copper alloys. There are 15 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is ASTM B477 Au-Ni-Ag and the bottom bar is C70620 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 95 | |
| 120 |
| Poisson's Ratio | 0.41 | |
| 0.34 |
| Shear Modulus, GPa | 34 | |
| 46 |
| Tensile Strength: Ultimate (UTS), MPa | 310 to 550 | |
| 300 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 80 | |
| 220 |
| Melting Completion (Liquidus), °C | 1010 | |
| 1120 |
| Melting Onset (Solidus), °C | 930 | |
| 1060 |
| Specific Heat Capacity, J/kg-K | 160 | |
| 390 |
| Thermal Expansion, µm/m-K | 15 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 8.9 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.1 | |
| 7.7 |
| Stiffness to Weight: Bending, points | 8.9 | |
| 19 |
| Strength to Weight: Axial, points | 5.0 to 9.0 | |
| 9.3 to 18 |
| Strength to Weight: Bending, points | 6.0 to 8.8 | |
| 11 to 17 |
| Thermal Shock Resistance, points | 16 to 28 | |
| 10 to 20 |
Alloy Composition
| Carbon (C), % | 0 | |
| 0 to 0.050 |
| Copper (Cu), % | 0 | |
| 86.5 to 90 |
| Gold (Au), % | 74.2 to 75.8 | |
| 0 |
| Iron (Fe), % | 0 | |
| 1.0 to 1.8 |
| Lead (Pb), % | 0 | |
| 0 to 0.020 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Nickel (Ni), % | 2.6 to 3.4 | |
| 9.0 to 11 |
| Phosphorus (P), % | 0 | |
| 0 to 0.2 |
| Silver (Ag), % | 21.4 to 22.6 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Zinc (Zn), % | 0 | |
| 0 to 0.5 |
| Residuals, % | 0 | |
| 0 to 0.5 |