Niobium has a 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
Standard: As per ASTM B392
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
Niobium is a rare, soft, malleable, ductile, gray-white metal. It has a body-centered cubic crystalline structure and in its physical and chemical properties, it resembles tantalum. It must be placed in a protective atmosphere when processed at even moderate temperatures because it tends to react with oxygen, carbon, halogens, nitrogen, and sulfur. The metal is inert to acids, even to aqua regia at room temperatures, but is attacked by hot, concentrated acids, and especially by alkalis and oxidizing agents.
Chemical composition for Nb Ingot
|Gr||Main Content||Impurities (≤ %)|
Mechanical requirements (annealed condition)
|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|