ACI-ASTM CN7MS Steel vs. C72200 Copper-nickel
ACI-ASTM CN7MS steel belongs to the iron alloys classification, while C72200 copper-nickel belongs to the copper alloys. They have a modest 20% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is C72200 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 130 |
| Poisson's Ratio | 0.28 | |
| 0.33 |
| Shear Modulus, GPa | 77 | |
| 48 |
| Tensile Strength: Ultimate (UTS), MPa | 540 | |
| 350 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 340 | |
| 220 |
| Maximum Temperature: Mechanical, °C | 1040 | |
| 230 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1180 |
| Melting Onset (Solidus), °C | 1350 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 400 |
| Thermal Conductivity, W/m-K | 12 | |
| 34 |
| Thermal Expansion, µm/m-K | 16 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 28 | |
| 36 |
| Density, g/cm3 | 7.9 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 5.1 | |
| 3.9 |
| Embodied Energy, MJ/kg | 71 | |
| 59 |
| Embodied Water, L/kg | 180 | |
| 300 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 8.0 |
| Stiffness to Weight: Bending, points | 25 | |
| 19 |
| Strength to Weight: Axial, points | 19 | |
| 11 to 18 |
| Strength to Weight: Bending, points | 19 | |
| 12 to 17 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 9.6 |
| Thermal Shock Resistance, points | 13 | |
| 12 to 20 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0 |
| Chromium (Cr), % | 18 to 20 | |
| 0.3 to 0.7 |
| Copper (Cu), % | 1.5 to 2.0 | |
| 78.1 to 84.2 |
| Iron (Fe), % | 45.4 to 53.5 | |
| 0.5 to 1.0 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 2.5 to 3.0 | |
| 0 |
| Nickel (Ni), % | 22 to 25 | |
| 15 to 18 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 2.5 to 3.5 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 1.0 |
| Residuals, % | 0 | |
| 0 to 0.2 |