Ductile Cast Iron vs. ACI-ASTM CB7Cu-1 Steel
Both ductile cast iron and ACI-ASTM CB7Cu-1 steel are iron alloys. They have 76% of their average alloy composition in common. There are 28 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 ACI-ASTM CB7Cu-1 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 310 | |
| 300 to 420 |
| Elastic (Young's, Tensile) Modulus, GPa | 170 to 180 | |
| 190 |
| Elongation at Break, % | 2.1 to 20 | |
| 5.7 to 11 |
| Poisson's Ratio | 0.28 to 0.31 | |
| 0.28 |
| Shear Modulus, GPa | 64 to 70 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 920 | |
| 960 to 1350 |
| Tensile Strength: Yield (Proof), MPa | 310 to 670 | |
| 760 to 1180 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 280 |
| Melting Completion (Liquidus), °C | 1160 | |
| 1430 |
| Melting Onset (Solidus), °C | 1120 | |
| 1500 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 480 |
| Thermal Conductivity, W/m-K | 31 to 36 | |
| 17 |
| Thermal Expansion, µm/m-K | 11 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 to 9.4 | |
| 2.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 13 |
| Density, g/cm3 | 7.1 to 7.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 2.6 |
| Embodied Energy, MJ/kg | 21 | |
| 38 |
| Embodied Water, L/kg | 43 | |
| 130 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 17 to 80 | |
| 71 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 280 to 1330 | |
| 1500 to 3590 |
| Stiffness to Weight: Axial, points | 12 to 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 to 26 | |
| 25 |
| Strength to Weight: Axial, points | 17 to 35 | |
| 34 to 48 |
| Strength to Weight: Bending, points | 18 to 29 | |
| 28 to 35 |
| Thermal Diffusivity, mm2/s | 8.9 to 10 | |
| 4.6 |
| Thermal Shock Resistance, points | 17 to 35 | |
| 32 to 45 |
Alloy Composition
| Carbon (C), % | 3.0 to 3.5 | |
| 0 to 0.070 |
| Chromium (Cr), % | 0 | |
| 15.5 to 17.7 |
| Copper (Cu), % | 0 | |
| 2.5 to 3.2 |
| Iron (Fe), % | 93.7 to 95.5 | |
| 72.3 to 78.4 |
| Manganese (Mn), % | 0 | |
| 0 to 0.7 |
| Nickel (Ni), % | 0 | |
| 3.6 to 4.6 |
| Niobium (Nb), % | 0 | |
| 0 to 0.35 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Phosphorus (P), % | 0 to 0.080 | |
| 0 to 0.035 |
| Silicon (Si), % | 1.5 to 2.8 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |