C70400 Copper-nickel vs. C68700 Brass
Both C70400 copper-nickel and C68700 brass are copper alloys. They have 78% of their average alloy composition in common.
For each property being compared, the top bar is C70400 copper-nickel and the bottom bar is C68700 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 110 |
| Poisson's Ratio | 0.34 | |
| 0.32 |
| Shear Modulus, GPa | 45 | |
| 41 |
| Tensile Strength: Ultimate (UTS), MPa | 300 to 310 | |
| 390 |
| Tensile Strength: Yield (Proof), MPa | 95 to 230 | |
| 140 |
Thermal Properties
| Latent Heat of Fusion, J/g | 210 | |
| 190 |
| Maximum Temperature: Mechanical, °C | 210 | |
| 160 |
| Melting Completion (Liquidus), °C | 1120 | |
| 970 |
| Melting Onset (Solidus), °C | 1060 | |
| 930 |
| Specific Heat Capacity, J/kg-K | 390 | |
| 400 |
| Thermal Conductivity, W/m-K | 64 | |
| 100 |
| Thermal Expansion, µm/m-K | 17 | |
| 19 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 14 | |
| 23 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 14 | |
| 25 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 32 | |
| 26 |
| Density, g/cm3 | 8.9 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 2.8 |
| Embodied Energy, MJ/kg | 47 | |
| 46 |
| Embodied Water, L/kg | 300 | |
| 340 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 38 to 220 | |
| 90 |
| Stiffness to Weight: Axial, points | 7.5 | |
| 7.3 |
| Stiffness to Weight: Bending, points | 19 | |
| 19 |
| Strength to Weight: Axial, points | 9.3 to 9.8 | |
| 13 |
| Strength to Weight: Bending, points | 11 to 12 | |
| 14 |
| Thermal Diffusivity, mm2/s | 18 | |
| 30 |
| Thermal Shock Resistance, points | 10 to 11 | |
| 13 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 1.8 to 2.5 |
| Arsenic (As), % | 0 | |
| 0.020 to 0.1 |
| Copper (Cu), % | 89.8 to 93.6 | |
| 76 to 79 |
| Iron (Fe), % | 1.3 to 1.7 | |
| 0 to 0.060 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 to 0.070 |
| Manganese (Mn), % | 0.3 to 0.8 | |
| 0 |
| Nickel (Ni), % | 4.8 to 6.2 | |
| 0 |
| Zinc (Zn), % | 0 to 1.0 | |
| 17.8 to 22.2 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.5 |