AWS ERNiCrMo-2 vs. SAE-AISI 8740 Steel
AWS ERNiCrMo-2 belongs to the nickel alloys classification, while SAE-AISI 8740 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 23 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 AWS ERNiCrMo-2 and the bottom bar is SAE-AISI 8740 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 750 | |
| 580 to 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 11 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.5 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.6 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 55 | |
| 2.6 |
| Density, g/cm3 | 8.4 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 9.2 | |
| 1.5 |
| Embodied Energy, MJ/kg | 120 | |
| 20 |
| Embodied Water, L/kg | 270 | |
| 50 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 25 | |
| 20 to 24 |
| Strength to Weight: Bending, points | 22 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 2.9 | |
| 10 |
| Thermal Shock Resistance, points | 20 | |
| 17 to 20 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.15 | |
| 0.38 to 0.43 |
| Chromium (Cr), % | 20.5 to 23 | |
| 0.4 to 0.6 |
| Cobalt (Co), % | 0.5 to 2.5 | |
| 0 |
| Copper (Cu), % | 0 to 0.5 | |
| 0 |
| Iron (Fe), % | 17 to 20 | |
| 96.5 to 97.7 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.75 to 1.0 |
| Molybdenum (Mo), % | 8.0 to 10 | |
| 0.2 to 0.3 |
| Nickel (Ni), % | 40.3 to 53.8 | |
| 0.4 to 0.7 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.040 |
| Tungsten (W), % | 0.2 to 1.0 | |
| 0 |
| Residuals, % | 0 to 0.5 | |
| 0 |