... 99.95% Tantalum Wire Grade: R05200, R05400, Ta2.5W, Ta10W Standard: ASTM B365 Certification: ISO9001 : 2008 99.95% Tantalum Wirewe can supply ... a protective oxide surface layer, using tantalum powder, pressed into a pellet shape, as one "plate" of the capacitor, ... personal computers, and automotive electronics.ASTM B 365 as follows: R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, ...