Type 2 Niobium vs. Type 3 Niobium
Both Type 2 niobium and Type 3 niobium are otherwise unclassified metals. Both are furnished in the annealed condition. Their average alloy composition is basically identical.
For each property being compared, the top bar is Type 2 niobium and the bottom bar is Type 3 niobium.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 110 | |
| 110 |
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 100 |
| Elongation at Break, % | 29 | |
| 23 |
| Poisson's Ratio | 0.4 | |
| 0.4 |
| Shear Modulus, GPa | 38 | |
| 38 |
| Tensile Strength: Ultimate (UTS), MPa | 140 | |
| 220 |
| Tensile Strength: Yield (Proof), MPa | 82 | |
| 140 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 310 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 270 |
| Thermal Conductivity, W/m-K | 52 | |
| 42 |
| Thermal Expansion, µm/m-K | 7.3 | |
| 7.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.6 | |
| 8.6 |
| Embodied Water, L/kg | 160 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 35 | |
| 44 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 32 | |
| 93 |
| Stiffness to Weight: Axial, points | 6.8 | |
| 6.8 |
| Stiffness to Weight: Bending, points | 18 | |
| 18 |
| Strength to Weight: Axial, points | 4.6 | |
| 7.2 |
| Strength to Weight: Bending, points | 7.1 | |
| 9.5 |
| Thermal Diffusivity, mm2/s | 23 | |
| 18 |
| Thermal Shock Resistance, points | 13 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.010 | |
| 0 to 0.010 |
| Hafnium (Hf), % | 0 to 0.020 | |
| 0 to 0.020 |
| Hydrogen (H), % | 0 to 0.0015 | |
| 0 to 0.0015 |
| Iron (Fe), % | 0 to 0.010 | |
| 0 to 0.0050 |
| Molybdenum (Mo), % | 0 to 0.020 | |
| 0 to 0.010 |
| Nickel (Ni), % | 0 to 0.0050 | |
| 0 to 0.0050 |
| Niobium (Nb), % | 99.5 to 100 | |
| 98.6 to 99.2 |
| Nitrogen (N), % | 0 to 0.010 | |
| 0 to 0.010 |
| Oxygen (O), % | 0 to 0.025 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.0050 | |
| 0 to 0.0050 |
| Tantalum (Ta), % | 0 to 0.3 | |
| 0 to 0.1 |
| Titanium (Ti), % | 0 to 0.030 | |
| 0 to 0.020 |
| Tungsten (W), % | 0 to 0.050 | |
| 0 to 0.030 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0.8 to 1.2 |