Wire Wire is a solid section other than strip, furnished in coils or on spools or reels. Wire may be furnished straightened and cut to length, in which case it is classified as rod. Rod Rod is a round, hexagonal or octagonal solid section furnished in straight lengths.
Rod is supplied in random or specific lengths.
Bar is an extruded product. If cut from plate it is called rolled bar. Edges are either sharp, rounded, or have some other simple shape. Tube Tube is a seamless hollow product with round or other cross section. Tube is normally extruded or drawn, and is supplied in random or specific lengths.