ACI-ASTM CK20 Steel vs. AWS ERNiCrMo-4
ACI-ASTM CK20 steel belongs to the iron alloys classification, while AWS ERNiCrMo-4 belongs to the nickel alloys. They have 42% of their average alloy composition in common. There are 20 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 CK20 steel and the bottom bar is AWS ERNiCrMo-4.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 220 |
| Elongation at Break, % | 37 | |
| 28 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 78 | |
| 84 |
| Tensile Strength: Ultimate (UTS), MPa | 530 | |
| 790 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 310 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1590 |
| Melting Onset (Solidus), °C | 1430 | |
| 1530 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 410 |
| Thermal Expansion, µm/m-K | 15 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 25 | |
| 70 |
| Density, g/cm3 | 7.8 | |
| 9.0 |
| Embodied Carbon, kg CO2/kg material | 4.4 | |
| 13 |
| Embodied Energy, MJ/kg | 62 | |
| 170 |
| Embodied Water, L/kg | 190 | |
| 280 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 22 |
| Strength to Weight: Axial, points | 19 | |
| 24 |
| Strength to Weight: Bending, points | 19 | |
| 21 |
| Thermal Shock Resistance, points | 13 | |
| 22 |
Alloy Composition
| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.020 |
| Chromium (Cr), % | 23 to 27 | |
| 14.5 to 16.5 |
| Cobalt (Co), % | 0 | |
| 0 to 2.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.5 |
| Iron (Fe), % | 46.7 to 58 | |
| 4.0 to 7.0 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 15 to 17 |
| Nickel (Ni), % | 19 to 22 | |
| 50 to 63.5 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 2.0 | |
| 0 to 0.080 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.030 |
| Tungsten (W), % | 0 | |
| 3.0 to 4.5 |
| Vanadium (V), % | 0 | |
| 0 to 0.35 |
| Residuals, % | 0 | |
| 0 to 0.5 |