Cold Rolled Vs Hot Rolled Sheet Steel

Cold rolled has sharper corners and more precise dimensions than hot rolled.

Cold rolled vs hot rolled sheet steel. Cold rolled steel is essentially hot rolled steel that has been through further processing. The steel is processed further in cold reduction mills where the material is cooled at room temperature followed by annealing and or tempers rolling. Once hot rolled steel has cooled it is then re rolled at room temperature to achieve more exact dimensions and better surface qualities. During cold rolling the steel is annealed or exposed to heat and allowed to cool which improves ductility.

Alternatively cold rolled steel has sharp edges a very smooth surface texture and an oily or greasy feel to it. This process is called hot rolling. Finished products created by the cold rolled steel process include bars strips rods and sheets which are usually smaller than the same products available through hot rolled methods. Rolling performed below a specific temperature will allow for recrystallizing and is called cold rolling.

Hot rolling and cold rolling are two methods of shaping steel. In this article we will compare hot rolled vs cold rolled steel sheets. During the hot rolling process steel is heated to its melting point while being worked changing the composition of the steel to make it more malleable. Hot rolled steel has rounded edges a rough surface texture and no grease on its finish.

Hot rolled steel is used in situations where precise shapes and tolerances are not required. When to use hot rolled steel. Basic difference between hot rolled and cold rolled steel is the way they are processed. The smaller products are also much more tolerant than the larger hot rolled versions.

Although this combines two processes the method as i will point out later has an advantage of economy and scheduling in the cold formed process. Cold rolled steel is essentially hot rolled steel that has had further processing. There are three main visual differences between the two processes. Cold formed is manufactured in two steps.

Cold worked steels are typically harder and stronger than standard hot rolled steels. Whereas cold rolled steel is processed in cold reduction mills followed by annealing and tempering. When the rolling is done above a certain temperature it prevents the steel from recrystallizing. Hot rolled steel involves rolling the steel above re crystallization temperatures.