... Baoji Zhong Bang rare metal materials CO.,LTD holds Tantalum ,Niobium as the dominant products in the scope of rare metal ... grades of their metals, sheet, tube, wire ,rod ,crucible , target ,alloy and so on. Niobium is an associated metal of tantalum ,characterized ... for steel ,ceramics ,electronics ,nuclear energy industries and superconductor technology. - Niobium wires (ASTM B 392-95) 0. 3mm up to 3 ...