Ductile Cast Iron vs. Type 2 Niobium
Ductile cast iron belongs to the iron alloys classification, while Type 2 niobium belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is ductile cast iron and the bottom bar is Type 2 niobium.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 310 | |
| 110 |
| Elastic (Young's, Tensile) Modulus, GPa | 170 to 180 | |
| 110 |
| Elongation at Break, % | 2.1 to 20 | |
| 29 |
| Poisson's Ratio | 0.28 to 0.31 | |
| 0.4 |
| Shear Modulus, GPa | 64 to 70 | |
| 38 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 920 | |
| 140 |
| Tensile Strength: Yield (Proof), MPa | 310 to 670 | |
| 82 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 320 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 270 |
| Thermal Conductivity, W/m-K | 31 to 36 | |
| 52 |
| Thermal Expansion, µm/m-K | 11 | |
| 7.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.1 to 7.5 | |
| 8.6 |
| Embodied Water, L/kg | 43 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 17 to 80 | |
| 35 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 280 to 1330 | |
| 32 |
| Stiffness to Weight: Axial, points | 12 to 14 | |
| 6.8 |
| Stiffness to Weight: Bending, points | 24 to 26 | |
| 18 |
| Strength to Weight: Axial, points | 17 to 35 | |
| 4.6 |
| Strength to Weight: Bending, points | 18 to 29 | |
| 7.1 |
| Thermal Diffusivity, mm2/s | 8.9 to 10 | |
| 23 |
| Thermal Shock Resistance, points | 17 to 35 | |
| 13 |
Alloy Composition
| Carbon (C), % | 3.0 to 3.5 | |
| 0 to 0.010 |
| Hafnium (Hf), % | 0 | |
| 0 to 0.020 |
| Hydrogen (H), % | 0 | |
| 0 to 0.0015 |
| Iron (Fe), % | 93.7 to 95.5 | |
| 0 to 0.010 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.020 |
| Nickel (Ni), % | 0 | |
| 0 to 0.0050 |
| Niobium (Nb), % | 0 | |
| 99.5 to 100 |
| Nitrogen (N), % | 0 | |
| 0 to 0.010 |
| Oxygen (O), % | 0 | |
| 0 to 0.025 |
| Phosphorus (P), % | 0 to 0.080 | |
| 0 |
| Silicon (Si), % | 1.5 to 2.8 | |
| 0 to 0.0050 |
| Tantalum (Ta), % | 0 | |
| 0 to 0.3 |
| Titanium (Ti), % | 0 | |
| 0 to 0.030 |
| Tungsten (W), % | 0 | |
| 0 to 0.050 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |