ASTM B541 Gold vs. C72200 Copper-nickel
ASTM B541 gold belongs to the otherwise unclassified metals classification, while C72200 copper-nickel belongs to the copper alloys. There are 17 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is ASTM B541 gold and the bottom bar is C72200 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 130 |
| Poisson's Ratio | 0.4 | |
| 0.33 |
| Shear Modulus, GPa | 38 | |
| 48 |
| Tensile Strength: Ultimate (UTS), MPa | 670 to 1180 | |
| 350 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 90 | |
| 220 |
| Melting Completion (Liquidus), °C | 1110 | |
| 1180 |
| Melting Onset (Solidus), °C | 930 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 170 | |
| 400 |
| Thermal Expansion, µm/m-K | 13 | |
| 16 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 to 12 | |
| 6.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 4.0 to 6.2 | |
| 6.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 8.9 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.4 | |
| 8.0 |
| Stiffness to Weight: Bending, points | 9.0 | |
| 19 |
| Strength to Weight: Axial, points | 11 to 19 | |
| 11 to 18 |
| Strength to Weight: Bending, points | 9.8 to 14 | |
| 12 to 17 |
| Thermal Shock Resistance, points | 36 to 63 | |
| 12 to 20 |
Alloy Composition
| Chromium (Cr), % | 0 | |
| 0.3 to 0.7 |
| Copper (Cu), % | 13.5 to 15.5 | |
| 78.1 to 84.2 |
| Gold (Au), % | 70.5 to 72.5 | |
| 0 |
| Iron (Fe), % | 0 | |
| 0.5 to 1.0 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Nickel (Ni), % | 0 | |
| 15 to 18 |
| Platinum (Pt), % | 8.0 to 9.0 | |
| 0 |
| Silver (Ag), % | 4.0 to 5.0 | |
| 0 |
| Zinc (Zn), % | 0.7 to 1.3 | |
| 0 to 1.0 |
| Residuals, % | 0 | |
| 0 to 0.2 |