C71640 Copper-nickel vs. S31254 Stainless Steel
C71640 copper-nickel belongs to the copper alloys classification, while S31254 stainless steel belongs to the iron alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is C71640 copper-nickel and the bottom bar is S31254 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 200 |
| Poisson's Ratio | 0.33 | |
| 0.28 |
| Shear Modulus, GPa | 52 | |
| 80 |
| Tensile Strength: Ultimate (UTS), MPa | 490 to 630 | |
| 720 |
| Tensile Strength: Yield (Proof), MPa | 190 to 460 | |
| 330 |
Thermal Properties
| Latent Heat of Fusion, J/g | 240 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 260 | |
| 1090 |
| Melting Completion (Liquidus), °C | 1180 | |
| 1460 |
| Melting Onset (Solidus), °C | 1120 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 460 |
| Thermal Conductivity, W/m-K | 29 | |
| 14 |
| Thermal Expansion, µm/m-K | 15 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 7.1 | |
| 2.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 40 | |
| 28 |
| Density, g/cm3 | 8.9 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 5.0 | |
| 5.5 |
| Embodied Energy, MJ/kg | 73 | |
| 74 |
| Embodied Water, L/kg | 280 | |
| 190 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 750 | |
| 270 |
| Stiffness to Weight: Axial, points | 8.7 | |
| 14 |
| Stiffness to Weight: Bending, points | 20 | |
| 24 |
| Strength to Weight: Axial, points | 15 to 20 | |
| 25 |
| Strength to Weight: Bending, points | 16 to 18 | |
| 22 |
| Thermal Diffusivity, mm2/s | 8.2 | |
| 3.8 |
| Thermal Shock Resistance, points | 16 to 21 | |
| 15 |
Alloy Composition
| Carbon (C), % | 0 | |
| 0 to 0.020 |
| Chromium (Cr), % | 0 | |
| 19.5 to 20.5 |
| Copper (Cu), % | 61.7 to 67.8 | |
| 0.5 to 1.0 |
| Iron (Fe), % | 1.7 to 2.3 | |
| 51.4 to 56.3 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 |
| Manganese (Mn), % | 1.5 to 2.5 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 6.0 to 6.5 |
| Nickel (Ni), % | 29 to 32 | |
| 17.5 to 18.5 |
| Nitrogen (N), % | 0 | |
| 0.18 to 0.22 |
| Phosphorus (P), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 | |
| 0 to 0.8 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Zinc (Zn), % | 0 to 1.0 | |
| 0 |
| Residuals, % | 0 to 0.5 | |
| 0 |