Billets are produced through three processes: first, they are directly cast into billets from molten steel through the continuous casting equipment of the steelmaking system; The second is the semi-finished products of steel produced by the steel making system through the rolling equipment of the steel rolling system; Third, semi-finished products of steel ingots produced by the steelmaking system are processed by forging equipment.

Generally, it is easy to distinguish between steel billets and steel products. However, for some steel billets with the same specifications and purposes as steel products (such as rolling pipe billets), they can be distinguished by whether they are used by other industries, whether they are processed by steel processing processes, and whether they are processed by finished rolling mills.