Stainless steel rods can be divided into three types according to production technology: hot rolling, forging and cold drawing. The specifications of hot-rolled stainless steel round bars are 5.5-250 mm. Among them: small stainless steel round bars of 5.5-25 mm are mostly supplied in straight strips and are commonly used as steel bars, bolts and various mechanical parts; stainless steel round bars larger than 25 mm are mainly used to manufacture mechanical parts or seamless steel pipe blanks .