... , screw, ring, wire, foil, sheet, rod, strip, plate, tube, alloys Niobium tube UNS Designation R05400 -- non-alloyed Tantalum,powder metallurgy,concretion ... .R04251 -- 3 TYPE -- Include 1% Zr reactor Niboium alloys.R04261 -- 4 TYPE -- Include 1% Zr industrial Niobium alloyes.Size : O.D ... nut, screw ,ring ,wire, foil, sheet, rod, strip, plate, tube, alloys according to Standard ASTM AMS ASME MIL DMS JIS ...