Round steel factory – Round steel is a long, solid steel bar with a round cross-section. Its specifications are expressed in millimeters of diameter, such as “50” which means round steel with a diameter of 50 millimeters. 45# round steel is divided into hot rolled, forged and cold drawn three kinds. Hot rolled round steel is 5.5-250 mm in size. Among them :5.5-25 mm small round steel is mostly supplied in straight strips in bundles, commonly used as steel bars, bolts and various mechanical parts; Round steel larger than 25 mm, mainly used for the manufacture of mechanical parts or seamless steel blanks.