... ,RO5200, RO5400, RO5252(Ta-2.5W) ASTM B 365-98 Tantalum barsPurity, >=99.95% Material,RO5200, RO5400, RO5252(Ta-2.5W ... 3629-83 GB/T14841-93Range of use: Mainly used for electrolytic capacitors,high-temperature furnaces and materials of missiles and rocengine,corrosion ...