Hot Rolled Vs Cold Rolled Sheet Steel

Since cold formed steel sheet pile was introduced over 40 years ago worldwide there are now over a dozen mills producing cold formed steel sheet pile compared to a half dozen hot rolled mills.

Hot rolled vs cold rolled sheet steel.

Cold rolled steel sheets and strips are available in a couple of different conditions including. The steel is processed further in cold reduction mills where the material is cooled at room temperature followed by annealing and or tempers rolling. Hot rolled steel is used in situations where precise shapes and tolerances are not required. Cold worked steels are typically harder and stronger than standard hot rolled steels.

Cold formed is manufactured in two steps. The smaller products are also much more tolerant than the larger hot rolled versions. Over a million tons of permanent and. Cold rolled steel is essentially hot rolled steel that has been through further processing.

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. Cold rolled steel while hot rolled steel is heated then cooled cold rolled steel is heated and cooled at the room temperature and then rolled after again. Once hot rolled steel has cooled it is then re rolled at room temperature to achieve more exact dimensions and better surface qualities. Hot rolled steel is rolled or shaped at a high temperature while cold rolled steel is rolled at room temperature.

Full hard half hard quarter hard and skin rolled. Hot rolled is manufactured in a single or two step process heating pre rolled steel beam blanks to such a high temperature that it allows it to be easily shaped and formed into sheet pile. Cold rolled has a smooth and shiny finish while hot rolled has a grey and scaly finish. Hot rolled steel has rounded edges a rough surface texture and no grease on its finish.

During cold rolling the steel is annealed or exposed to heat and allowed to cool which improves ductility. Basic difference between hot rolled and cold rolled steel is the way they are processed. 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. Hot rolled steel involves rolling the steel above re crystallization temperatures.

There are three main visual differences between the two processes. Cold rolled steel is essentially hot rolled steel that has had further processing. Cold rolled has sharper corners and more precise dimensions than hot rolled.