Ductile Cast Iron vs. EN 1.6579 Steel
Both ductile cast iron and EN 1.6579 steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is ductile cast iron and the bottom bar is EN 1.6579 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 310 | |
| 260 to 290 |
| Elastic (Young's, Tensile) Modulus, GPa | 170 to 180 | |
| 190 |
| Elongation at Break, % | 2.1 to 20 | |
| 11 to 14 |
| Poisson's Ratio | 0.28 to 0.31 | |
| 0.29 |
| Shear Modulus, GPa | 64 to 70 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 920 | |
| 850 to 980 |
| Tensile Strength: Yield (Proof), MPa | 310 to 670 | |
| 600 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 290 | |
| 440 |
| Melting Completion (Liquidus), °C | 1160 | |
| 1460 |
| Melting Onset (Solidus), °C | 1120 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 470 |
| Thermal Conductivity, W/m-K | 31 to 36 | |
| 39 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 7.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 to 9.4 | |
| 8.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 3.7 |
| Density, g/cm3 | 7.1 to 7.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.7 |
| Embodied Energy, MJ/kg | 21 | |
| 22 |
| Embodied Water, L/kg | 43 | |
| 56 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 17 to 80 | |
| 100 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 280 to 1330 | |
| 950 to 2210 |
| Stiffness to Weight: Axial, points | 12 to 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 to 26 | |
| 24 |
| Strength to Weight: Axial, points | 17 to 35 | |
| 30 to 35 |
| Strength to Weight: Bending, points | 18 to 29 | |
| 25 to 28 |
| Thermal Diffusivity, mm2/s | 8.9 to 10 | |
| 11 |
| Thermal Shock Resistance, points | 17 to 35 | |
| 25 to 29 |
Alloy Composition
| Carbon (C), % | 3.0 to 3.5 | |
| 0.32 to 0.38 |
| Chromium (Cr), % | 0 | |
| 1.4 to 1.7 |
| Iron (Fe), % | 93.7 to 95.5 | |
| 94.2 to 96.1 |
| Manganese (Mn), % | 0 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.15 to 0.35 |
| Nickel (Ni), % | 0 | |
| 1.4 to 1.7 |
| Phosphorus (P), % | 0 to 0.080 | |
| 0 to 0.025 |
| Silicon (Si), % | 1.5 to 2.8 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |