ACI-ASTM CN7M Steel vs. AWS ERNiCrMo-3
ACI-ASTM CN7M steel belongs to the iron alloys classification, while AWS ERNiCrMo-3 belongs to the nickel alloys. They have 55% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CN7M steel and the bottom bar is AWS ERNiCrMo-3.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 44 | |
| 34 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 480 | |
| 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 330 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1480 |
| Melting Onset (Solidus), °C | 1450 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 440 |
| Thermal Conductivity, W/m-K | 21 | |
| 11 |
| Thermal Expansion, µm/m-K | 15 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.6 | |
| 1.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 1.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 32 | |
| 80 |
| Density, g/cm3 | 8.1 | |
| 8.6 |
| Embodied Carbon, kg CO2/kg material | 5.6 | |
| 14 |
| Embodied Energy, MJ/kg | 78 | |
| 190 |
| Embodied Water, L/kg | 210 | |
| 290 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 17 | |
| 28 |
| Strength to Weight: Bending, points | 17 | |
| 24 |
| Thermal Diffusivity, mm2/s | 5.6 | |
| 2.8 |
| Thermal Shock Resistance, points | 12 | |
| 25 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.4 |
| Carbon (C), % | 0 to 0.070 | |
| 0 to 0.010 |
| Chromium (Cr), % | 19 to 22 | |
| 20 to 23 |
| Copper (Cu), % | 3.0 to 4.0 | |
| 0 to 0.5 |
| Iron (Fe), % | 37.4 to 48.5 | |
| 0 to 5.0 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 2.0 to 3.0 | |
| 8.0 to 10 |
| Nickel (Ni), % | 27.5 to 30.5 | |
| 58 to 68.9 |
| Niobium (Nb), % | 0 | |
| 3.2 to 4.2 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0 to 0.4 |
| Residuals, % | 0 | |
| 0 to 0.5 |