ASTM B541 Gold vs. C72900 Copper-nickel
ASTM B541 gold belongs to the otherwise unclassified metals classification, while C72900 copper-nickel belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is ASTM B541 gold and the bottom bar is C72900 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 120 |
| Elongation at Break, % | 6.0 to 14 | |
| 6.0 to 20 |
| Poisson's Ratio | 0.4 | |
| 0.34 |
| Shear Modulus, GPa | 38 | |
| 45 |
| Shear Strength, MPa | 410 to 690 | |
| 540 to 630 |
| Tensile Strength: Ultimate (UTS), MPa | 670 to 1180 | |
| 870 to 1080 |
| Tensile Strength: Yield (Proof), MPa | 480 to 900 | |
| 700 to 920 |
Thermal Properties
| Latent Heat of Fusion, J/g | 90 | |
| 210 |
| Melting Completion (Liquidus), °C | 1110 | |
| 1120 |
| Melting Onset (Solidus), °C | 930 | |
| 950 |
| Specific Heat Capacity, J/kg-K | 170 | |
| 380 |
| Thermal Expansion, µm/m-K | 13 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 to 12 | |
| 7.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 4.0 to 6.2 | |
| 8.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 8.8 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 65 to 91 | |
| 49 to 210 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1090 to 3830 | |
| 2030 to 3490 |
| Stiffness to Weight: Axial, points | 3.4 | |
| 7.6 |
| Stiffness to Weight: Bending, points | 9.0 | |
| 19 |
| Strength to Weight: Axial, points | 11 to 19 | |
| 27 to 34 |
| Strength to Weight: Bending, points | 9.8 to 14 | |
| 23 to 27 |
| Thermal Shock Resistance, points | 36 to 63 | |
| 31 to 38 |
Alloy Composition
| Copper (Cu), % | 13.5 to 15.5 | |
| 74.1 to 78 |
| Gold (Au), % | 70.5 to 72.5 | |
| 0 |
| Iron (Fe), % | 0 | |
| 0 to 0.5 |
| Lead (Pb), % | 0 | |
| 0 to 0.020 |
| Magnesium (Mg), % | 0 | |
| 0 to 0.15 |
| Manganese (Mn), % | 0 | |
| 0 to 0.3 |
| Nickel (Ni), % | 0 | |
| 14.5 to 15.5 |
| Niobium (Nb), % | 0 | |
| 0 to 0.1 |
| Platinum (Pt), % | 8.0 to 9.0 | |
| 0 |
| Silver (Ag), % | 4.0 to 5.0 | |
| 0 |
| Tin (Sn), % | 0 | |
| 7.5 to 8.5 |
| Zinc (Zn), % | 0.7 to 1.3 | |
| 0 to 0.5 |
| Residuals, % | 0 | |
| 0 to 0.3 |