... , as the metal powder, is in the production of electronic components, mainly capacitors and some high-power resistors. Tantalum ... .ASTM B 365 as follows: R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, or both, R05400, unalloyed tantalum, powder ... R05255, tantalum alloy, 90 % tantalum 10 % tungsten, electron-beam furnace or vacuum-arc melt, or both, R05252, tantalum alloy, 97.5 ...