... plate, tube, alloys Niobium tube UNS Designation R05400 -- non-alloyed Tantalum,powder metallurgy,concretion.UNS Designation R05200 -- non-alloyed Tantalum,vacuum ARC ... Tantalum alloys, 60% Ta,40% Nb alloys,electron bombardment or vacuum ARC melting.or both. Size : O.D.8mm-120mm x ... nut, screw ,ring ,wire, foil, sheet, rod, strip, plate, tube, alloys according to Standard ASTM AMS ASME MIL DMS JIS ...