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Niobium-zirconium tube ASTM B394 Seamless Nb1 Niobium Tube Polished Surface High purity Nb1 Seamless RO4200
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ASTM B394 seamless Nb1 niobium tube polished surface High Purity Nb1 Seamless RO4200
Niobium is a silver coloured metal which is generally found in conjunction with tantalum, the two elements being separated by fractional crystallisation of their respective fluoro-complexes. It has an abundance of 20 ppm in the earth's crust. As a pure metal, is very reactive and forms an extremely stable oxide when exposed to air which enhances its corrosion resistance. Niobium will react with a variety of non-metals at elevated temperatures.
Chemical Component
| Chemistry % | ||||||||||||||
| Designation | Chief component | Impurities maxmium | ||||||||||||
| Nb | Fe | Si | Ni | W | Mo | Ti | Ta | O | C | H | N | |||
| Nb1 | Remainder | 0.004 | 0.003 | 0.002 | 0.004 | 0.004 | 0.002 | 0.07 | 0.015 | 0.004 | 0.0015 | 0.002 | ||
| Nb2 | Remainder | 0.02 | 0.02 | 0.005 | 0.02 | 0.02 | 0.005 | 0.15 | 0.03 | 0.01 | 0.0015 | 0.01 | ||
Mechnical Requirement
| Grade | Ultimate Tensile Strength min(Mpa) | Yield strength ( 0.2%),min(MPa) | Elongation in1"/2length min,% |
| Type 1-Welded | 18000 (125) | 10500(73) | 25 |
| Type 1-Seamless | 18000 (125) | 8500(59) | 25 |
| Type 2-Welded | 18000 (125) | 10500(73) | 25 |
| Type2-Seamless | 18000 (125) | 8500(59) | 25 |
| Type 3 | 28000(195) | 18000(125) | 20 |
| Type 4 | 28000(195) | 18000(125) | 20 |
| Item | Niobium Tube |
| Grade | Nb1 |
| Diameter | Accept customization |
| Technology | Casting; forging; sintering; annealing; cold-Rolling |
| Type | Rod; Plate; Tube; Crucible; Wire; Boat; Fabricated parts |
| Lead Time | 15 days around |
| Quality Test | Dimension inspection |
| Appearance quality test | |
| Process performance test | |
| Mechanical properities test |
| Chemical Composition (Impurities % ≤) | ||||||||
| Elements | O | C | N | H | Fe | Ni | Si | Hf |
| Spec. | 0.025 | 0.01 | 0.01 | 0.0015 | 0.01 | 0.005 | 0.005 | 0.02 |
| Test | 0.007 | 0.002 | 0.002 | 0.0004 | 0.0012 | <0.001 | <0.001 | <0.001 |
| Elements | W | Mo | Ta | Zr | Al | Ti | Nb | --- |
| Spec. | 0.05 | 0.02 | 0.3 | 0.02 | 0.005 | 0.03 | Bal | --- |
| Test | <0.001 | <0.001 | 0.015 | <0.001 | <0.001 | <0.001 | Bal | --- |