Ductile Cast Iron vs. Nuclear Grade Hafnium
Ductile cast iron belongs to the iron alloys classification, while nuclear grade hafnium belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is ductile cast iron and the bottom bar is nuclear grade hafnium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 170 to 180 | |
| 78 |
| Elongation at Break, % | 2.1 to 20 | |
| 25 |
| Poisson's Ratio | 0.28 to 0.31 | |
| 0.26 |
| Shear Modulus, GPa | 64 to 70 | |
| 31 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 920 | |
| 350 |
| Tensile Strength: Yield (Proof), MPa | 310 to 670 | |
| 170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 130 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 140 |
| Thermal Expansion, µm/m-K | 11 | |
| 5.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.1 to 7.5 | |
| 13 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 17 to 80 | |
| 73 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 280 to 1330 | |
| 180 |
| Stiffness to Weight: Axial, points | 12 to 14 | |
| 3.3 |
| Stiffness to Weight: Bending, points | 24 to 26 | |
| 11 |
| Strength to Weight: Axial, points | 17 to 35 | |
| 7.4 |
| Strength to Weight: Bending, points | 18 to 29 | |
| 8.4 |
| Thermal Shock Resistance, points | 17 to 35 | |
| 55 |
Alloy Composition
| Carbon (C), % | 3.0 to 3.5 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 99.8 to 100 |
| Iron (Fe), % | 93.7 to 95.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.080 | |
| 0 |
| Silicon (Si), % | 1.5 to 2.8 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.23 |