Steel profiled bar is one of the four major types of steel (profiles, wires, plates, pipes), and it is a widely used steel. According to the section shape, steel profiled bar can be divided into simple section steel and complex or special section steel. The former is characterized by the fact that the tangent line made at any point on the circumference of the cross-section does not generally intersect in the cross-section. Such as: square steel, round steel, flat steel, angle steel, hexagonal steel, etc. Common profiles are hot-rolled window frame steel, plough steel, hot-rolled profiles for automobile wheel ring, hot-rolled profiles for caterpillar plate, hot-rolled profiles for automobile wheel rim, rail, ball flat steel for shipbuilding, cable plate steel, scraper steel, etc.