Automotive Grey Cast Iron vs. SAE-AISI 4340 Steel
Both automotive grey cast iron and SAE-AISI 4340 steel are iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 4340 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 280 | |
| 210 to 360 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 190 |
| Elongation at Break, % | 9.6 to 14 | |
| 12 to 22 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 69 to 70 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 140 to 290 | |
| 690 to 1280 |
| Tensile Strength: Yield (Proof), MPa | 94 to 200 | |
| 470 to 1150 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 to 280 | |
| 250 |
| Melting Completion (Liquidus), °C | 1380 to 1390 | |
| 1460 |
| Melting Onset (Solidus), °C | 1340 to 1350 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 470 |
| Thermal Conductivity, W/m-K | 41 to 43 | |
| 44 |
| Thermal Expansion, µm/m-K | 12 to 14 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 to 7.6 | |
| 7.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 to 9.1 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 to 3.0 | |
| 3.5 |
| Density, g/cm3 | 7.5 to 7.6 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.7 | |
| 1.7 |
| Embodied Energy, MJ/kg | 21 to 24 | |
| 22 |
| Embodied Water, L/kg | 44 to 51 | |
| 53 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 18 to 25 | |
| 79 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 25 to 110 | |
| 590 to 3490 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 5.2 to 11 | |
| 24 to 45 |
| Strength to Weight: Bending, points | 8.0 to 13 | |
| 22 to 33 |
| Thermal Diffusivity, mm2/s | 11 to 12 | |
| 12 |
| Thermal Shock Resistance, points | 4.2 to 8.6 | |
| 20 to 38 |