Type 3 Niobium vs. Automotive Grey Cast Iron
Type 3 niobium belongs to the otherwise unclassified metals classification, while automotive grey cast iron belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is Type 3 niobium and the bottom bar is automotive grey cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 110 | |
| 160 to 280 |
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 180 |
| Elongation at Break, % | 23 | |
| 9.6 to 14 |
| Poisson's Ratio | 0.4 | |
| 0.29 |
| Shear Modulus, GPa | 38 | |
| 69 to 70 |
| Tensile Strength: Ultimate (UTS), MPa | 220 | |
| 140 to 290 |
| Tensile Strength: Yield (Proof), MPa | 140 | |
| 94 to 200 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 260 to 280 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 490 |
| Thermal Conductivity, W/m-K | 42 | |
| 41 to 43 |
| Thermal Expansion, µm/m-K | 7.3 | |
| 12 to 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.6 | |
| 7.5 to 7.6 |
| Embodied Water, L/kg | 160 | |
| 44 to 51 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 44 | |
| 18 to 25 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 93 | |
| 25 to 110 |
| Stiffness to Weight: Axial, points | 6.8 | |
| 13 |
| Stiffness to Weight: Bending, points | 18 | |
| 25 |
| Strength to Weight: Axial, points | 7.2 | |
| 5.2 to 11 |
| Strength to Weight: Bending, points | 9.5 | |
| 8.0 to 13 |
| Thermal Diffusivity, mm2/s | 18 | |
| 11 to 12 |
| Thermal Shock Resistance, points | 21 | |
| 4.2 to 8.6 |