C77000 Nickel Silver vs. C72500 Copper-nickel
Both C77000 nickel silver and C72500 copper-nickel are copper alloys. They have 65% of their average alloy composition in common.
For each property being compared, the top bar is C77000 nickel silver and the bottom bar is C72500 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 120 |
| Poisson's Ratio | 0.31 | |
| 0.34 |
| Rockwell B Hardness | 52 to 99 | |
| 75 to 100 |
| Rockwell Superficial 30T Hardness | 49 to 90 | |
| 62 to 89 |
| Shear Modulus, GPa | 46 | |
| 45 |
| Tensile Strength: Ultimate (UTS), MPa | 420 to 800 | |
| 420 to 780 |
Thermal Properties
| Latent Heat of Fusion, J/g | 200 | |
| 210 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 210 |
| Melting Completion (Liquidus), °C | 1050 | |
| 1130 |
| Melting Onset (Solidus), °C | 1000 | |
| 1060 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 390 |
| Thermal Conductivity, W/m-K | 29 | |
| 54 |
| Thermal Expansion, µm/m-K | 17 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 5.5 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 6.0 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 31 | |
| 35 |
| Density, g/cm3 | 8.3 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 4.1 | |
| 3.6 |
| Embodied Energy, MJ/kg | 63 | |
| 55 |
| Embodied Water, L/kg | 300 | |
| 320 |
Common Calculations
| Stiffness to Weight: Axial, points | 8.1 | |
| 7.6 |
| Stiffness to Weight: Bending, points | 20 | |
| 19 |
| Strength to Weight: Axial, points | 14 to 27 | |
| 13 to 24 |
| Strength to Weight: Bending, points | 15 to 23 | |
| 14 to 21 |
| Thermal Diffusivity, mm2/s | 8.8 | |
| 16 |
| Thermal Shock Resistance, points | 15 to 28 | |
| 14 to 27 |
Alloy Composition
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| Copper (Cu), % | 53.5 to 56.5 | |
| 85.2 to 89.7 |
| Iron (Fe), % | 0 to 0.25 | |
| 0 to 0.6 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0 to 0.2 |
| Nickel (Ni), % | 16.5 to 19.5 | |
| 8.5 to 10.5 |
| Tin (Sn), % | 0 | |
| 1.8 to 2.8 |
| Zinc (Zn), % | 22.7 to 30 | |
| 0 to 0.5 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.2 |