Ductile Cast Iron vs. ASTM A572 Steel
Both ductile cast iron and ASTM A572 steel are iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is ductile cast iron and the bottom bar is ASTM A572 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 310 | |
| 140 to 190 |
| Elastic (Young's, Tensile) Modulus, GPa | 170 to 180 | |
| 190 |
| Elongation at Break, % | 2.1 to 20 | |
| 18 to 25 |
| Poisson's Ratio | 0.28 to 0.31 | |
| 0.29 |
| Shear Modulus, GPa | 64 to 70 | |
| 73 |
| Shear Strength, MPa | 420 to 800 | |
| 300 to 380 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 920 | |
| 470 to 620 |
| Tensile Strength: Yield (Proof), MPa | 310 to 670 | |
| 330 to 510 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 290 | |
| 400 |
| 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 | |
| 51 |
| 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 | |
| 8.2 to 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 2.0 |
| Density, g/cm3 | 7.1 to 7.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.6 |
| Embodied Energy, MJ/kg | 21 | |
| 22 |
| Embodied Water, L/kg | 43 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 17 to 80 | |
| 100 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 280 to 1330 | |
| 290 to 690 |
| 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 22 |
| Strength to Weight: Bending, points | 18 to 29 | |
| 17 to 21 |
| Thermal Diffusivity, mm2/s | 8.9 to 10 | |
| 14 |
| Thermal Shock Resistance, points | 17 to 35 | |
| 14 to 18 |