China hot rolled carnon steel square flat bar Q235 Q355 20# 45# 3SP 5SP prime carbon mild steel billet

Steel billet is originally steel, and after processing, it can be used as mechanical parts, forgings, processing various steels, section steel Q345B channel steel, and wire is the role of the billet. Steel billets refer to semi-finished products used in the production of steel, which generally cannot be directly used by society. There are strict classification standards for billets andsteel products, which cannot be determined by whether they are the final products of the enterprise, but must be implemented according to the unified standards of the whole society. Usually, billets and steels are relatively easy to distinguish, but for some billets, which have the same specifications and the same use as steel (such as rolled tube billets), it can be determined by whether they are used in other industries and whether they have undergone the steel processing process. , Whether it has been processed by the finished rolling mill to distinguish.