Ниобия стержня / бар

Niobium rod/bar Material: RO4200-1, RO4210-2A Size: Dia3 100mm Standard: ASTM B392-98 Purity: ≥99.9% or 99.95% Table.1 Chemical composition: 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 Table 2. Mechanical requirements (annealed condition) Grade Tensile strength δbpsi (MPa), ≥ Yield strengthδ0.2, psi (MPa),≥ Elongation in 1"/2" gage length, %, ≥ RO4200-1 RO4210-2 18000 (125) 12000 (85) 25 Special requirements to be agreed on by the supplier and buyer of negotiation.