NRC

tantalum [ and niobium ] metals and alloys of tantalum [ and niobium, ] all in the form of powders, ingots, disks, rods, wire, strips, bars, plates, sheets, foils, tubing, and preforms

sputtering cathodes

[ vacuum furnace components; namely, heat shields, sintering trays and heating elements, heat exchangers, chemical processing pump and valve linings for corrosive liquids, thermowells, furnace crucibles, evaporation sources; namely, evaporation boats, and glass-lined vessel patch kits consisting of tantalum disks, studs and nuts ]