ACI-ASTM CN7MS Steel vs. AWS ERNi-1
ACI-ASTM CN7MS steel belongs to the iron alloys classification, while AWS ERNi-1 belongs to the nickel alloys. They have a modest 25% 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 (10, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is AWS ERNi-1.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 180 |
| Elongation at Break, % | 39 | |
| 22 |
| Poisson's Ratio | 0.28 | |
| 0.31 |
| Shear Modulus, GPa | 77 | |
| 69 |
| Tensile Strength: Ultimate (UTS), MPa | 540 | |
| 470 |
Thermal Properties
| Latent Heat of Fusion, J/g | 340 | |
| 300 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1360 |
| Melting Onset (Solidus), °C | 1350 | |
| 1310 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Conductivity, W/m-K | 12 | |
| 73 |
| Thermal Expansion, µm/m-K | 16 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 28 | |
| 60 |
| Density, g/cm3 | 7.9 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 5.1 | |
| 11 |
| Embodied Energy, MJ/kg | 71 | |
| 150 |
| Embodied Water, L/kg | 180 | |
| 230 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 12 |
| Stiffness to Weight: Bending, points | 25 | |
| 22 |
| Strength to Weight: Axial, points | 19 | |
| 15 |
| Strength to Weight: Bending, points | 19 | |
| 15 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 19 |
| Thermal Shock Resistance, points | 13 | |
| 17 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 1.5 |
| Carbon (C), % | 0 to 0.070 | |
| 0 to 0.15 |
| Chromium (Cr), % | 18 to 20 | |
| 0 |
| Copper (Cu), % | 1.5 to 2.0 | |
| 0 to 0.25 |
| Iron (Fe), % | 45.4 to 53.5 | |
| 0 to 1.0 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 2.5 to 3.0 | |
| 0 |
| Nickel (Ni), % | 22 to 25 | |
| 93 to 98 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.030 |
| Silicon (Si), % | 2.5 to 3.5 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 2.0 to 3.5 |
| Residuals, % | 0 | |
| 0 to 0.5 |