1. Introduce
– Pure niobium is used as an alloying agent in steel production due to its ductile nature, but its strength is improved when impurities are added
– Steel containing a small amount of niobium (about 0.1%) has excellent strength, wear resistance, and heat resistance
– It becomes a superconductor at low temperatures, and the superconducting critical temperature for pure niobium at atmospheric pressure is 9.2K, the highest among elements
2. Property
– Excellent hardness, corrosion resistance, toughness, wear resistance, machinability, weldability, high temperature oxidation resistance
[Nb Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| 125 | 75 | 25 |
[Nb Physical Properties]
| Density (g/㎤) | Melting Range (℃) | Electrical resistivity (µΩ∙㎝) | Specific Heat (J/kg∙℃) | Thermal Conductivity (W/mK) | Coefficient of Thermal Expansion (µm/m°C) |
|---|---|---|---|---|---|
| 8.57 | 2477 | 15 | 265 | 52 | 7.1 |
3. Application
– Welding rod, iron pipe, superconducting magnet, steel additive, automobile body, oil pipeline, high temperature super alloy, combustion device, implant
(1) Superconducting magnets / (2) Steel additives / (3) Automobile bodies / (4) Combustion devices
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