Hot Rolled Vs Cold Rolled Sheet Steel

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 vs cold rolled sheet steel.

Cold rolled has a smooth and shiny finish while hot rolled has a grey and scaly finish. 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 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. Basic difference between hot rolled and cold rolled steel is the way they are processed.

Cold rolled steel is essentially hot rolled steel that has had further processing. Cold rolled steel sheets and strips are available in a couple of different conditions including. Cold worked steels are typically harder and stronger than standard hot rolled steels. 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 steel involves rolling the steel above re crystallization temperatures. Over a million tons of permanent and. Hot rolled steel is rolled or shaped at a high temperature while cold rolled steel is rolled at room temperature. 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. Cold rolled steel is essentially hot rolled steel that has been through further processing. The smaller products are also much more tolerant than the larger hot rolled versions. Cold formed is manufactured in two steps.

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. 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.

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. Cold rolled has sharper corners and more precise dimensions than hot rolled. Full hard half hard quarter hard and skin rolled.