... as wire, tube, bar,plate,etc Changsha south tantalum niobium Co.,Ltd specialize in refractory metals, for ... & development manufacture and sale of rare metal Tantalum,Niobium ,Tantalum alloy and Niobium alloy, series of products are ... up to 3. 0mm Diameter x coil at random length 90% tantalum, 10% tungsten, as per ASTM ... up to 3. 0mm Diameter x coil at random length 97. 5% tantalum, 2. 5% tungsten, as per ...