Niobium, available in 4200 - Type 1 reactor grade, is a high-purity niobium alloy with high corrosion resistance, excellent weldability, and superior performance in high-temperature environments. Applications include nuclear environments, engine rocket nozzles, and chemical processing.
Chemical composition
| Element | ASTM B392 UNS R04200 % |
| Carbon | 0.0250 max |
| Oxygen | 0.0100 max |
| Nitrogen | 0.0100 max |
| Hydrogen | 0.0015 max |
Physical properties - Niobium 4200 - Type 1 reactor grade
| Metric | English | |
| Density | 8.60 g/cm³ | 0.311 lb/in³ |
| Modulus of elasticity | 103 GPa | 14,900 ksi |
| Electrical resistivity | 1.51 *10-5 Ω-cm | 5.94 *10^-6 Ω-in |
| Thermal conductivity | 52.3 W/m-K | 363 BTU-in/hr-ft²-°F |
| Coefficient of thermal expansion | 7.1 µm/m-°C | 3.94 µin/in-°F |
* Values are calculated at 20 °C [68 °F]
Mechanical properties - Niobium 4200 - Type 1 reactor grade
| Grade | Thickness | Yield strength (0.2% offset) |
Ultimate tensile strength | Elongation % (mmᵃ) |
| Type 1 - Wire | 3.18 to 63.5 mm [0.020 to 0.124 in] |
- | 125 MPa [18,000 psi] | 20 |
ᵃ 254 mm [10 in] gage length to 1.27 mm [0.050 in] diameter, and 25.4 mm [1 in] or 50.8 mm [2 in] gage length equal to or over 1.27 mm [0.050 in].