Niobium and Niobium Alloys Tubes and Pipes

1． Niobium and Niobium Alloys Grade: RO4200-1，RO4210-2 2. Specification: Diameter Size: ODΦ2mm~Φ100mm; Wall Thickness 0.2~5mm×Length200~8000mm; 3. Standard: ASTM B394-18 Chemical Compositio