Automotive Grey Cast Iron vs. ASTM Grade HN Steel
Both automotive grey cast iron and ASTM grade HN steel are iron alloys. There are 23 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 ASTM grade HN steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 280 | |
| 140 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 200 |
| Elongation at Break, % | 9.6 to 14 | |
| 9.0 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 69 to 70 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 140 to 290 | |
| 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 to 280 | |
| 310 |
| 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 | |
| 13 |
| Thermal Expansion, µm/m-K | 12 to 14 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 to 3.0 | |
| 26 |
| Density, g/cm3 | 7.5 to 7.6 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.7 | |
| 4.6 |
| Embodied Energy, MJ/kg | 21 to 24 | |
| 66 |
| Embodied Water, L/kg | 44 to 51 | |
| 180 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 5.2 to 11 | |
| 17 |
| Strength to Weight: Bending, points | 8.0 to 13 | |
| 18 |
| Thermal Diffusivity, mm2/s | 11 to 12 | |
| 3.5 |
| Thermal Shock Resistance, points | 4.2 to 8.6 | |
| 11 |