C68700 Brass vs. C71640 Copper-nickel
Both C68700 brass and C71640 copper-nickel are copper alloys. They have 66% of their average alloy composition in common.
For each property being compared, the top bar is C68700 brass and the bottom bar is C71640 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 140 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 41 | |
| 52 |
| Tensile Strength: Ultimate (UTS), MPa | 390 | |
| 490 to 630 |
| Tensile Strength: Yield (Proof), MPa | 140 | |
| 190 to 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 190 | |
| 240 |
| Maximum Temperature: Mechanical, °C | 160 | |
| 260 |
| Melting Completion (Liquidus), °C | 970 | |
| 1180 |
| Melting Onset (Solidus), °C | 930 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 410 |
| Thermal Conductivity, W/m-K | 100 | |
| 29 |
| Thermal Expansion, µm/m-K | 19 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 23 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 25 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 26 | |
| 40 |
| Density, g/cm3 | 8.3 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 5.0 |
| Embodied Energy, MJ/kg | 46 | |
| 73 |
| Embodied Water, L/kg | 340 | |
| 280 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 90 | |
| 130 to 750 |
| Stiffness to Weight: Axial, points | 7.3 | |
| 8.7 |
| Stiffness to Weight: Bending, points | 19 | |
| 20 |
| Strength to Weight: Axial, points | 13 | |
| 15 to 20 |
| Strength to Weight: Bending, points | 14 | |
| 16 to 18 |
| Thermal Diffusivity, mm2/s | 30 | |
| 8.2 |
| Thermal Shock Resistance, points | 13 | |
| 16 to 21 |
Alloy Composition
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| Aluminum (Al), % | 1.8 to 2.5 | |
| 0 |
| Arsenic (As), % | 0.020 to 0.1 | |
| 0 |
| Copper (Cu), % | 76 to 79 | |
| 61.7 to 67.8 |
| Iron (Fe), % | 0 to 0.060 | |
| 1.7 to 2.3 |
| Lead (Pb), % | 0 to 0.070 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0 | |
| 1.5 to 2.5 |
| Nickel (Ni), % | 0 | |
| 29 to 32 |
| Zinc (Zn), % | 17.8 to 22.2 | |
| 0 to 1.0 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.5 |