Round steel is a solid strip of steel with a circular cross section.Its specifications are expressed inmillimeters of diameter ,such as “50”means round steel with a diameter of 50mm.45#round steel is divided into three type:hot rolling,forging and cold drawing.

The size of hot-rolled round steel is 5.5-250mm.Among them:5.5-25mm small round steel is mostly supplied in straight bundles,and is often used as steel bars,bolts and various mechanical parts;round steel larger than 25mm is mainly used for manufacturing mechanical parts or as seamless steel pipe billets.