Billet is originally steel, after processing can be used as mechanical parts, forgings, processing all kinds of steel, steel Q345B channel steel, wire is the role of billet.Normally, billets and steel are relatively easy to distinguish, but for some billets, with the same specifications and the same purpose as steel (such as rolled tube billets), can be distinguished by whether they are used in other industries, whether they have undergone steel processing processes, and whether they have been processed by the finished mill.