Niobium Bar can be widely applied for pharmacy, semiconductor, aviation and aerospace, nuclear, high temperature assemblies and other fields.
Specification for Niobium Bar
Material: R04200-Type 1 -Reactor grade unalloyed niobium
R04210-Type 2 -Commercial grade unalloyed niobium
R04251-Type 3—Reactor grade niobium alloy containing 1 % zirconium
R04261-Type 4—Commercial grade niobium alloy containing 1 % zirconium
R40220-Type 5 -RRR grade pure niobium
Size: 5x5mm to 120mm x 120mm x L<1400mm Wider bars will be named niobium plate and block.
Standard: As per ASTM B392
Purity: >=99.9%
Chemical composition for Nb bar
| Composition% | ||||||||||||
| Gr | Main Content | Impurities (≤ %) | ||||||||||
| Nb | Fe | Si | Ni | W | Mo | Ti | Ta | O | C | H | N | |
| Nb1 | Bal | 0.004 | 0.004 | 0.002 | 0.005 | 0.005 | 0.002 | 0.05 | .012 | .0035 | .0012 | .003 |
| Nb2 | Bal | 0.01 | 0.01 | 0.005 | 0.02 | 0.01 | 0.004 | 0.07 | .015 | .0050 | .0015 | .008 |
Mechanical requirements (annealed condition) for Niobium bar
| Grade | Tensile strength,δb psi (MPa), ≥ | Yield strength,δ0.2, psi (MPa), ≥ | Elongation in 1″/2″ gage length, %, ≥ |
| R04200-1 R04210-2 | 18000 (125) | 10500 (73) | 25 |
| Special requirements of niobium ingot to be agreed on negotiations | |||
