Steel alloys; cast steel; iron, unwrought or semi-wrought; cast iron, unwrought or semi-wrought; titanium iron; ingots of common metal; blooms [metallurgy]; titanium; alloys of common metal; vanadium; metals in powder form; steel sheets; angle irons of metal; steel pipes; pipes of metal; buildings of metal; prefabricated houses [kits] of metal; roofing of metal; building materials of metal; sheets and plates of metal; railway material of metal; rails of metal; steel wire; wire of common metal alloys, except fuse wire; iron wire; wrapping or binding bands of metal; soldering wire of metal; ores of metal