Niobium Bar

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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

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