Grey Cast Iron vs. S31730 Stainless Steel
Both grey cast iron and S31730 stainless steel are iron alloys. They have 58% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is grey cast iron and the bottom bar is S31730 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 300 | |
| 180 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 200 |
| Elongation at Break, % | 9.6 | |
| 40 |
| Fatigue Strength, MPa | 69 to 170 | |
| 170 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 69 | |
| 77 |
| Shear Strength, MPa | 180 to 610 | |
| 370 |
| Tensile Strength: Ultimate (UTS), MPa | 160 to 450 | |
| 540 |
| Tensile Strength: Yield (Proof), MPa | 98 to 290 | |
| 200 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 290 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1430 |
| Melting Onset (Solidus), °C | 1180 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 470 |
| Thermal Expansion, µm/m-K | 11 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 24 |
| Density, g/cm3 | 7.5 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 4.6 |
| Embodied Energy, MJ/kg | 21 | |
| 63 |
| Embodied Water, L/kg | 44 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 13 to 37 | |
| 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 27 to 240 | |
| 99 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 5.8 to 17 | |
| 19 |
| Strength to Weight: Bending, points | 8.7 to 17 | |
| 18 |
| Thermal Shock Resistance, points | 6.0 to 17 | |
| 12 |
Alloy Composition
| Carbon (C), % | 3.1 to 3.4 | |
| 0 to 0.030 |
| Chromium (Cr), % | 0 | |
| 17 to 19 |
| Copper (Cu), % | 0 | |
| 4.0 to 5.0 |
| Iron (Fe), % | 92.1 to 93.9 | |
| 52.4 to 61 |
| Manganese (Mn), % | 0.5 to 0.7 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 3.0 to 4.0 |
| Nickel (Ni), % | 0 | |
| 15 to 16.5 |
| Nitrogen (N), % | 0 | |
| 0 to 0.045 |
| 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 0.010 |