Niobium crucible is renowned for its exceptional high-temperature resistance, corrosion resistance, and durability. Ideal for use in chemical processing, metallurgy, and crystal growth applications, they ensure purity and stability in extreme conditions.
Table 1. Chemical composition
Chemical Composition (%) | ||||||||||||
Material | Main elements(%) | Impurities (Maximum %) | ||||||||||
Nb | Fe | Si | Ni | W | Mo | Ti | Ta | O | C | H | N | |
RO4200 | Remainder | 0.004 | 0.004 | 0.002 | 0.005 | 0.005 | 0.002 | 0.07 | 0.015 | 0.0040 | 0.0015 | 0.003 |
RO4210 | Remainder | 0.01 | 0.01 | 0.005 | 0.02 | 0.01 | 0.004 | 0.10 | 0.02 | 0.01 | 0.0015 | 0.01 |
Table 2. Mechanical requirements (annealed condition)
Grade | Tensile strength δbpsi (MPa), ≥ | Yield strength δ0.2, psi (MPa),≥ | Elongation in 1″/2″ gage length, %, ≥ | |
>=0.010 | <0.010 | |||
RO4200, RO4210 | 18000 (125) | 12000 (85) | 25 | 20 |
Application
Niobium crucible is mainly used in the metallurgical industry, chemical industry, machinery processing, glass, and ceramic industries.
