Grade 20 Cast Iron vs. AWS E3155
Both grade 20 cast iron and AWS E3155 are iron alloys. They have a modest 31% 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 (11, in this case) are not shown.
For each property being compared, the top bar is grade 20 cast iron and the bottom bar is AWS E3155.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 210 |
| Elongation at Break, % | 9.6 | |
| 23 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 69 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 160 | |
| 770 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 310 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1460 |
| Melting Onset (Solidus), °C | 1180 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 450 |
| Thermal Conductivity, W/m-K | 46 | |
| 13 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 70 |
| Density, g/cm3 | 7.5 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 7.7 |
| Embodied Energy, MJ/kg | 21 | |
| 110 |
| Embodied Water, L/kg | 44 | |
| 300 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 5.8 | |
| 26 |
| Strength to Weight: Bending, points | 8.7 | |
| 22 |
| Thermal Diffusivity, mm2/s | 13 | |
| 3.3 |
| Thermal Shock Resistance, points | 6.0 | |
| 20 |
Alloy Composition
| Carbon (C), % | 3.1 to 3.4 | |
| 0 to 0.1 |
| Chromium (Cr), % | 0 | |
| 20 to 22.5 |
| Cobalt (Co), % | 0 | |
| 18.5 to 21 |
| Copper (Cu), % | 0 | |
| 0 to 0.75 |
| Iron (Fe), % | 92.1 to 93.9 | |
| 23.3 to 36.3 |
| Manganese (Mn), % | 0.5 to 0.7 | |
| 1.0 to 2.5 |
| Molybdenum (Mo), % | 0 | |
| 2.5 to 3.5 |
| Nickel (Ni), % | 0 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 0.75 to 1.3 |
| Phosphorus (P), % | 0 to 0.9 | |
| 0 to 0.040 |
| Silicon (Si), % | 2.5 to 2.8 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.15 | |
| 0 to 0.030 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.0 |