ACI-ASTM CH20 Steel vs. AWS ERNiCr-3
ACI-ASTM CH20 steel belongs to the iron alloys classification, while AWS ERNiCr-3 belongs to the nickel alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. 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 CH20 steel and the bottom bar is AWS ERNiCr-3.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 38 | |
| 34 |
| Poisson's Ratio | 0.27 | |
| 0.29 |
| Shear Modulus, GPa | 78 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 610 | |
| 630 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 320 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1380 |
| Melting Onset (Solidus), °C | 1430 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 460 |
| Thermal Expansion, µm/m-K | 15 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 20 | |
| 70 |
| Density, g/cm3 | 7.8 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 3.7 | |
| 11 |
| Embodied Energy, MJ/kg | 53 | |
| 160 |
| Embodied Water, L/kg | 180 | |
| 280 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 22 | |
| 21 |
| Strength to Weight: Bending, points | 21 | |
| 19 |
| Thermal Shock Resistance, points | 15 | |
| 18 |
Alloy Composition
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| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.1 |
| Chromium (Cr), % | 22 to 26 | |
| 18 to 22 |
| Cobalt (Co), % | 0 | |
| 0 to 0.12 |
| Copper (Cu), % | 0 | |
| 0 to 0.5 |
| Iron (Fe), % | 54.7 to 66 | |
| 0 to 3.0 |
| Manganese (Mn), % | 0 to 1.5 | |
| 2.5 to 3.5 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 |
| Nickel (Ni), % | 12 to 15 | |
| 67 to 77.5 |
| Niobium (Nb), % | 0 | |
| 2.0 to 3.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 2.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0 to 0.75 |
| Residuals, % | 0 | |
| 0 to 0.5 |