6 Common metals and their alloys; metal ores; unprocessed and semi-processed materials of metal, in the nature of ores, ingots, slabs, billets, blooms, bars and concentrates; common metals, unwrought and semi-worked, for further manufacture; ferrous metals; non-ferrous metals; unwrought or semi-wrought copper, aluminum, tin, iron, steel, cobalt ores; non-electric cables and wires of common metal; welding and soldering materials, namely, metal welding rods and welding wire; metal containers for storage or transport; iron ores