Common metals and their alloys; iron; iron alloys; ores; iron ores; metallic ores; ferrous ores; processed metal ores; processed iron ores; iron, unwrought or semi-wrought; metal powders; ore powders; iron powders; mineral ores in this class; common metals, unwrought or semi-wrought; alloys of common metals; pig iron; ores of metal; limonite; chrome ores