SAE-AISI A9 Steel vs. Automotive Malleable Cast Iron
Both SAE-AISI A9 steel and automotive malleable cast iron are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI A9 steel and the bottom bar is automotive malleable cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 180 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 74 | |
| 70 |
| Tensile Strength: Ultimate (UTS), MPa | 770 to 2030 | |
| 350 to 720 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 260 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1410 |
| Melting Onset (Solidus), °C | 1410 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 35 | |
| 41 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.9 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.2 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 1.9 |
| Density, g/cm3 | 7.8 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 4.7 | |
| 1.5 |
| Embodied Energy, MJ/kg | 70 | |
| 20 |
| Embodied Water, L/kg | 82 | |
| 45 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 28 to 73 | |
| 13 to 26 |
| Strength to Weight: Bending, points | 24 to 46 | |
| 14 to 24 |
| Thermal Diffusivity, mm2/s | 9.6 | |
| 11 |
| Thermal Shock Resistance, points | 25 to 66 | |
| 9.9 to 21 |
Alloy Composition
| Carbon (C), % | 0.45 to 0.55 | |
| 2.2 to 2.9 |
| Chromium (Cr), % | 4.8 to 5.5 | |
| 0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 87 to 90.5 | |
| 93.6 to 96.7 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0.15 to 1.3 |
| Molybdenum (Mo), % | 1.3 to 1.8 | |
| 0 |
| Nickel (Ni), % | 1.3 to 1.8 | |
| 0 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0.020 to 0.15 |
| Silicon (Si), % | 1.0 to 1.2 | |
| 0.9 to 1.9 |
| Sulfur (S), % | 0 to 0.030 | |
| 0.020 to 0.2 |
| Vanadium (V), % | 0.8 to 1.4 | |
| 0 |