Austenitic Grey Cast Iron vs. S21904 Stainless Steel
Both austenitic grey cast iron and S21904 stainless steel are iron alloys. There are 21 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 austenitic grey cast iron and the bottom bar is S21904 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 110 to 210 | |
| 210 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 200 |
| Poisson's Ratio | 0.29 to 0.3 | |
| 0.28 |
| Shear Modulus, GPa | 69 to 72 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 150 to 230 | |
| 700 to 1000 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 to 350 | |
| 290 |
| Melting Completion (Liquidus), °C | 1340 to 1400 | |
| 1400 |
| Melting Onset (Solidus), °C | 1290 to 1350 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 470 to 490 | |
| 480 |
| Thermal Expansion, µm/m-K | 13 to 14 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 to 24 | |
| 15 |
| Density, g/cm3 | 7.7 to 8.1 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 3.1 to 4.7 | |
| 3.0 |
| Embodied Energy, MJ/kg | 43 to 65 | |
| 43 |
| Embodied Water, L/kg | 93 to 120 | |
| 160 |
Common Calculations
| PREN (Pitting Resistance) | 2.0 to 5.0 | |
| 25 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 to 25 | |
| 25 |
| Strength to Weight: Axial, points | 5.3 to 8.2 | |
| 25 to 36 |
| Strength to Weight: Bending, points | 7.9 to 11 | |
| 23 to 29 |
| Thermal Shock Resistance, points | 4.5 to 6.5 | |
| 15 to 21 |