Automotive Malleable Cast Iron vs. EN 1.7725 Steel
Both automotive malleable cast iron and EN 1.7725 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is automotive malleable cast iron and the bottom bar is EN 1.7725 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 130 to 290 | |
| 250 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 190 |
| Elongation at Break, % | 1.0 to 10 | |
| 14 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 70 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 350 to 720 | |
| 830 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 220 to 590 | |
| 610 to 860 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 250 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1460 |
| Melting Onset (Solidus), °C | 1370 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 41 | |
| 39 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.7 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 2.9 |
| Density, g/cm3 | 7.6 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.8 |
| Embodied Energy, MJ/kg | 20 | |
| 24 |
| Embodied Water, L/kg | 45 | |
| 54 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 6.8 to 30 | |
| 110 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 950 | |
| 980 to 1940 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 13 to 26 | |
| 29 to 35 |
| Strength to Weight: Bending, points | 14 to 24 | |
| 25 to 28 |
| Thermal Diffusivity, mm2/s | 11 | |
| 11 |
| Thermal Shock Resistance, points | 9.9 to 21 | |
| 24 to 29 |
Alloy Composition
| Carbon (C), % | 2.2 to 2.9 | |
| 0.27 to 0.34 |
| Chromium (Cr), % | 0 | |
| 1.3 to 1.7 |
| Iron (Fe), % | 93.6 to 96.7 | |
| 95.7 to 97.5 |
| Manganese (Mn), % | 0.15 to 1.3 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.3 to 0.5 |
| Phosphorus (P), % | 0.020 to 0.15 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.9 to 1.9 | |
| 0 to 0.6 |
| Sulfur (S), % | 0.020 to 0.2 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.050 to 0.15 |