Automotive Grey Cast Iron vs. Automotive Malleable Cast Iron
Both automotive grey cast iron and automotive malleable cast iron are iron alloys.
For each property being compared, the top bar is automotive grey cast iron and the bottom bar is automotive malleable cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 280 | |
| 130 to 290 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 180 |
| Elongation at Break, % | 9.6 to 14 | |
| 1.0 to 10 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 69 to 70 | |
| 70 |
| Tensile Strength: Ultimate (UTS), MPa | 140 to 290 | |
| 350 to 720 |
| Tensile Strength: Yield (Proof), MPa | 94 to 200 | |
| 220 to 590 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 to 280 | |
| 260 |
| Melting Completion (Liquidus), °C | 1380 to 1390 | |
| 1410 |
| Melting Onset (Solidus), °C | 1340 to 1350 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 480 |
| Thermal Conductivity, W/m-K | 41 to 43 | |
| 41 |
| Thermal Expansion, µm/m-K | 12 to 14 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 to 7.6 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 to 9.1 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 to 3.0 | |
| 1.9 |
| Density, g/cm3 | 7.5 to 7.6 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.7 | |
| 1.5 |
| Embodied Energy, MJ/kg | 21 to 24 | |
| 20 |
| Embodied Water, L/kg | 44 to 51 | |
| 45 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 18 to 25 | |
| 6.8 to 30 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 25 to 110 | |
| 130 to 950 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 5.2 to 11 | |
| 13 to 26 |
| Strength to Weight: Bending, points | 8.0 to 13 | |
| 14 to 24 |
| Thermal Diffusivity, mm2/s | 11 to 12 | |
| 11 |
| Thermal Shock Resistance, points | 4.2 to 8.6 | |
| 9.9 to 21 |