Style: 99.95% Tantalum Wire Grade: R05200, R05400, Ta2.5W, Ta10W Standard: ASTM B365 Certification: ... , dense, ductile, very hard, easily fabricated, and highly conductive of heat and electricity. The metal is renowned for its resistance, as ... tantalum, powder-metallurgy consolidation, R05255, tantalum alloy, 90 % tantalum 10 % tungsten, electron-beam furnace or vacuum-arc melt, or both, R05252 ...