... nut, screw, ring, wire, foil, sheet, rod, strip, plate, tube, alloys Niobium tube UNS Designation R05400 -- non-alloyed Tantalum,powder metallurgy,concretion ... nut, screw ,ring ,wire, foil, sheet, rod, strip, plate, tube, alloys according to Standard ASTM AMS ASME MIL DMS JIS ... GB, etc.As a DNV certified ISO9001:2000 company, we have strict quality control system and provide professional service to ...