flanges of metal, pipe elbows of metal, pipe reducers of metal, caps or saddle connections of metal for pipes, T pieces of metal for pipes, crosspieces of metal for pipes, long weld neck flanges of metal, long weld neck pressure cut-off valve, not being parts of machines, construction steels, fine-grained construction steels, heat-treatable steels, steel alloys, unalloyed steels, stainless steel, duplex steels, aluminum alloys, aluminum, namely, seamless and welded pipes, plates, ingots, round steel bars, titanium; common metals and their alloys; common metals and their alloys, namely, seamless and welded pipes, plates, ingots, round steel bars; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery in the nature of small items of metal hardware, namely, couplings, half couplings, crosses, hex head bushing, pipe nipples; pipes and tubes of metal; safes; goods of common metal not included in other classes, namely flanges, fittings and pipe connectors for pipes, pressure vessels; ores