C71640 Copper-nickel vs. SAE-AISI 8645 Steel
C71640 copper-nickel belongs to the copper alloys classification, while SAE-AISI 8645 steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is C71640 copper-nickel and the bottom bar is SAE-AISI 8645 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 190 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 52 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 490 to 630 | |
| 600 to 670 |
| Tensile Strength: Yield (Proof), MPa | 190 to 460 | |
| 390 to 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 240 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 260 | |
| 410 |
| Melting Completion (Liquidus), °C | 1180 | |
| 1460 |
| Melting Onset (Solidus), °C | 1120 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 470 |
| Thermal Conductivity, W/m-K | 29 | |
| 39 |
| Thermal Expansion, µm/m-K | 15 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 7.1 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 40 | |
| 2.6 |
| Density, g/cm3 | 8.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 5.0 | |
| 1.5 |
| Embodied Energy, MJ/kg | 73 | |
| 20 |
| Embodied Water, L/kg | 280 | |
| 50 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 750 | |
| 420 to 840 |
| Stiffness to Weight: Axial, points | 8.7 | |
| 13 |
| Stiffness to Weight: Bending, points | 20 | |
| 24 |
| Strength to Weight: Axial, points | 15 to 20 | |
| 21 to 24 |
| Strength to Weight: Bending, points | 16 to 18 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 8.2 | |
| 10 |
| Thermal Shock Resistance, points | 16 to 21 | |
| 18 to 20 |
Alloy Composition
| Carbon (C), % | 0 | |
| 0.43 to 0.48 |
| Chromium (Cr), % | 0 | |
| 0.4 to 0.6 |
| Copper (Cu), % | 61.7 to 67.8 | |
| 0 |
| Iron (Fe), % | 1.7 to 2.3 | |
| 96.5 to 97.7 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 |
| Manganese (Mn), % | 1.5 to 2.5 | |
| 0.75 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 29 to 32 | |
| 0.4 to 0.7 |
| Phosphorus (P), % | 0 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 | |
| 0 to 0.040 |
| Zinc (Zn), % | 0 to 1.0 | |
| 0 |
| Residuals, % | 0 to 0.5 | |
| 0 |