Round steel is mainly produced through hot - rolling or cold - drawing processes. In the hot - rolling process, steel billets are heated to a high temperature above the recrystallization temperature and then passed through a series of rolling mills with circular - shaped rolls to form round steel. Cold - drawing is a subsequent process after hot - rolling. The hot - rolled round steel is further verarbeitet bei Raumtemperatur durch Ziehen durch Stanze, um den Durchmesser zu verringern und seine dimensionale Genauigkeit und mechanische Eigenschaften zu verbessern. .