Our company specializes in manufacture sale of rare metal Tantalum alloy and Niobium alloy such as wire, tube, bar,plate,etc Changsha south ... as foils, sheets, wires, rods, bars, plates, seamless tubes, targets, crucibles capillary tube, welded tubing sputtering target etc. in conformity with ASTM ... per ASTM B708-98 R05252; - Tantalum alloy (Ta2. 5w, Ta-2. 5w, Ta2. 5w) seamless tube OD1.5 up to 120 mm ...