unwrought and partly wrought common metals and their alloys; metallic building materials, namely structural sections, half sections, channels, angles, pile planks and sheet pilings, and rolled pilings; rolled and cast metal building materials, namely rails, beams, sheet pilings, wire rods, wires, rods, bars and semi-finished metals for forging and stamping; metal rails for railway tracks; and metallic railway track accessories, namely tie plates, fish plates and sleepers, and steel cross-ties