M20 C71000 Copper-nickel vs. M20 C77000 Nickel Silver
Both M20 C71000 copper-nickel and M20 C77000 nickel silver are copper alloys. Both are furnished in the M20 (as hot rolled) condition. They have 74% of their average alloy composition in common.
For each property being compared, the top bar is M20 C71000 copper-nickel and the bottom bar is M20 C77000 nickel silver.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 130 | |
| 120 |
| Poisson's Ratio | 0.33 | |
| 0.31 |
| Shear Modulus, GPa | 49 | |
| 46 |
| Tensile Strength: Ultimate (UTS), MPa | 320 | |
| 480 |
Thermal Properties
| Latent Heat of Fusion, J/g | 230 | |
| 200 |
| Maximum Temperature: Mechanical, °C | 240 | |
| 180 |
| Melting Completion (Liquidus), °C | 1200 | |
| 1050 |
| Melting Onset (Solidus), °C | 1150 | |
| 1000 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 400 |
| Thermal Conductivity, W/m-K | 43 | |
| 29 |
| Thermal Expansion, µm/m-K | 15 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 6.5 | |
| 5.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 6.6 | |
| 6.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 37 | |
| 31 |
| Density, g/cm3 | 8.9 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 4.3 | |
| 4.1 |
| Embodied Energy, MJ/kg | 63 | |
| 63 |
| Embodied Water, L/kg | 290 | |
| 300 |
Common Calculations
| Stiffness to Weight: Axial, points | 8.2 | |
| 8.1 |
| Stiffness to Weight: Bending, points | 19 | |
| 20 |
| Strength to Weight: Axial, points | 10 | |
| 16 |
| Strength to Weight: Bending, points | 12 | |
| 16 |
| Thermal Diffusivity, mm2/s | 12 | |
| 8.8 |
| Thermal Shock Resistance, points | 12 | |
| 17 |
Alloy Composition
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| Copper (Cu), % | 73.5 to 80.5 | |
| 53.5 to 56.5 |
| Iron (Fe), % | 0.5 to 1.0 | |
| 0 to 0.25 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 19 to 23 | |
| 16.5 to 19.5 |
| Zinc (Zn), % | 0 to 1.0 | |
| 22.7 to 30 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.5 |