Niobium Ingot

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Niobium have high melting point, excellent resistance to corrosion and good workability. Niobium ingot can be used to process various niobium mill products which are widely applied for pharmacy, semiconductor, aviation and aerospace, nuclear, high temperature assemblies and other fields.

Specification for Niobium Ingot

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
Diameter: 55-145mm diameter x L<1400mm
Standard: As per ASTM B392
Purity: >=99.9%

Chemical composition for Nb Ingot

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 Ingot

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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