EN 1.7725 Steel vs. C71640 Copper-nickel
EN 1.7725 steel belongs to the iron alloys classification, while C71640 copper-nickel belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is C71640 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 140 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 73 | |
| 52 |
| Tensile Strength: Ultimate (UTS), MPa | 830 to 1000 | |
| 490 to 630 |
| Tensile Strength: Yield (Proof), MPa | 610 to 860 | |
| 190 to 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 240 |
| Maximum Temperature: Mechanical, °C | 440 | |
| 260 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1180 |
| Melting Onset (Solidus), °C | 1420 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 410 |
| Thermal Conductivity, W/m-K | 39 | |
| 29 |
| Thermal Expansion, µm/m-K | 13 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.9 | |
| 40 |
| Density, g/cm3 | 7.8 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 5.0 |
| Embodied Energy, MJ/kg | 24 | |
| 73 |
| Embodied Water, L/kg | 54 | |
| 280 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 980 to 1940 | |
| 130 to 750 |
| Stiffness to Weight: Axial, points | 13 | |
| 8.7 |
| Stiffness to Weight: Bending, points | 24 | |
| 20 |
| Strength to Weight: Axial, points | 29 to 35 | |
| 15 to 20 |
| Strength to Weight: Bending, points | 25 to 28 | |
| 16 to 18 |
| Thermal Diffusivity, mm2/s | 11 | |
| 8.2 |
| Thermal Shock Resistance, points | 24 to 29 | |
| 16 to 21 |
Alloy Composition
| Carbon (C), % | 0.27 to 0.34 | |
| 0 |
| Chromium (Cr), % | 1.3 to 1.7 | |
| 0 |
| Copper (Cu), % | 0 | |
| 61.7 to 67.8 |
| Iron (Fe), % | 95.7 to 97.5 | |
| 1.7 to 2.3 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0.6 to 1.0 | |
| 1.5 to 2.5 |
| Molybdenum (Mo), % | 0.3 to 0.5 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 29 to 32 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Vanadium (V), % | 0.050 to 0.15 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 1.0 |
| Residuals, % | 0 | |
| 0 to 0.5 |