Automotive Grey Cast Iron vs. S21904 Stainless Steel
Both automotive grey cast iron and S21904 stainless steel are iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is automotive grey cast iron and the bottom bar is S21904 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 280 | |
| 210 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 200 |
| Elongation at Break, % | 9.6 to 14 | |
| 17 to 51 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 69 to 70 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 140 to 290 | |
| 700 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 94 to 200 | |
| 390 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 to 280 | |
| 290 |
| Melting Completion (Liquidus), °C | 1380 to 1390 | |
| 1400 |
| Melting Onset (Solidus), °C | 1340 to 1350 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 480 |
| Thermal Conductivity, W/m-K | 41 to 43 | |
| 14 |
| Thermal Expansion, µm/m-K | 12 to 14 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 to 7.6 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 to 9.1 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 to 3.0 | |
| 15 |
| Density, g/cm3 | 7.5 to 7.6 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.7 | |
| 3.0 |
| Embodied Energy, MJ/kg | 21 to 24 | |
| 43 |
| Embodied Water, L/kg | 44 to 51 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 18 to 25 | |
| 160 to 310 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 25 to 110 | |
| 380 to 2070 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 5.2 to 11 | |
| 25 to 36 |
| Strength to Weight: Bending, points | 8.0 to 13 | |
| 23 to 29 |
| Thermal Diffusivity, mm2/s | 11 to 12 | |
| 3.8 |
| Thermal Shock Resistance, points | 4.2 to 8.6 | |
| 15 to 21 |