Ductile Cast Iron vs. EN 1.7321 Steel
Both ductile cast iron and EN 1.7321 steel are iron alloys. They have a moderately high 95% of their average alloy composition in common. There are 25 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 ductile cast iron and the bottom bar is EN 1.7321 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 310 | |
| 150 to 170 |
| Elastic (Young's, Tensile) Modulus, GPa | 170 to 180 | |
| 190 |
| 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 | |
| 490 to 1460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 290 | |
| 410 |
| Melting Completion (Liquidus), °C | 1160 | |
| 1460 |
| Melting Onset (Solidus), °C | 1120 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 470 |
| Thermal Conductivity, W/m-K | 31 to 36 | |
| 45 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 to 9.4 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 2.5 |
| Density, g/cm3 | 7.1 to 7.5 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.5 |
| Embodied Energy, MJ/kg | 21 | |
| 20 |
| Embodied Water, L/kg | 43 | |
| 50 |
Common Calculations
| 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 | |
| 17 to 52 |
| Strength to Weight: Bending, points | 18 to 29 | |
| 18 to 36 |
| Thermal Diffusivity, mm2/s | 8.9 to 10 | |
| 12 |
| Thermal Shock Resistance, points | 17 to 35 | |
| 14 to 43 |
Alloy Composition
| Carbon (C), % | 3.0 to 3.5 | |
| 0.17 to 0.23 |
| Chromium (Cr), % | 0 | |
| 0.3 to 0.6 |
| Copper (Cu), % | 0 | |
| 0 to 0.25 |
| Iron (Fe), % | 93.7 to 95.5 | |
| 97.1 to 98.4 |
| Manganese (Mn), % | 0 | |
| 0.7 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.4 to 0.5 |
| Phosphorus (P), % | 0 to 0.080 | |
| 0 to 0.025 |
| Silicon (Si), % | 1.5 to 2.8 | |
| 0 to 0.3 |
| Sulfur (S), % | 0 | |
| 0 to 0.025 |