Automotive Grey Cast Iron vs. SAE-AISI H21 Steel
Both automotive grey cast iron and SAE-AISI H21 steel are iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is automotive grey cast iron and the bottom bar is SAE-AISI H21 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 200 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 69 to 70 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 140 to 290 | |
| 720 to 1790 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 to 280 | |
| 250 |
| Melting Completion (Liquidus), °C | 1380 to 1390 | |
| 1630 |
| Melting Onset (Solidus), °C | 1340 to 1350 | |
| 1580 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 440 |
| Thermal Conductivity, W/m-K | 41 to 43 | |
| 27 |
| Thermal Expansion, µm/m-K | 12 to 14 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 to 3.0 | |
| 23 |
| Density, g/cm3 | 7.5 to 7.6 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.7 | |
| 4.5 |
| Embodied Energy, MJ/kg | 21 to 24 | |
| 68 |
| Embodied Water, L/kg | 44 to 51 | |
| 72 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 5.2 to 11 | |
| 23 to 58 |
| Strength to Weight: Bending, points | 8.0 to 13 | |
| 21 to 38 |
| Thermal Diffusivity, mm2/s | 11 to 12 | |
| 7.1 |
| Thermal Shock Resistance, points | 4.2 to 8.6 | |
| 24 to 59 |