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Niobium Tube
Grade: RO4200-1, RO4210-2
Standard: ASTM B392-98
Standard size: Diameter 0.25~3 mm
Purity: Nb>99.9% or >99.95%
Niobium Tube Applications
Due to niobium’s high melting point, corrosion resistance, cold processing and good performance characteristics, niobium wire is widely used in chemical, electronic, aviation and aerospace fields.
Niobium Tube Specifications
| Diameter, Inch (mm) | Tolerance, +/-Inch (mm) |
| 0.010~0.020 (0.254~0.508) | 0.0005 (0.013) |
| 0.020~0.030 (0.508~0.762) | 0.00075 (0.019) |
| 0.030~0.060 (0.762~1.524) | 0.001 (0.025) |
| 0.060~0.090 (1.524~2.286) | 0.0015 ( 0.038) |
| 0.090~0.125 (2.286~3.175) | 0.002 (0.051) |
Chemical Composition of Niobium Tube
| Grade | Major Components | Maximum Impurities (ppm) | ||||||||||
| Nb | Ta | Si | Ni | W | Mo | Ti | Fe | O | C | H | N | |
| Nb1 | Balance | <700 | 50 | 50 | 50 | 30 | 20 | 50 | 150 | 40 | 15 | 30 |
| Nb2 | Balance | <1000 | 80 | 40 | 100 | 100 | 40 | 80 | 180 | 60 | 15 | 50 |
Niobium Tube Properties
| Grade | Tensile Strength δbpsi (MPa) ≥ | Yield Strength δ0.2, psi (MPa) ≥ | Elongation in 1″/2″ Gage Length, ％, >=0.010 | Elongation in 1″/2″ Gage Length, ％, <0.010 |
| RO4200-1 | 18000 (125) | 12000 (85) | 25 | 20 |
| RO4210-2 |
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