There are various methods of forming steel into finished products, including hot forging, hot and cold rolling, seamless tube making and welded tube making. The most widely used process is hot rolling, which accounts for over 90% of all steel production.
Rolling is a forming process, which causes permanent change of shape (set) by plastic deformation of the material as it passes between sets of steel rolls.Sets of cylindrical rolls reduce the cross-sectional thickness of the metal whilst simultaneously causing it to become elongated. Other rolling processes are employed to change the cross-sectional shape of the metal using shaped rolls while other methods form the metal into a specific shape for a particular purpose.
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