Cold Rolled Vs Hot Rolled Sheet Steel

As an example a hot rolled steel product may have a yield strength of 235 mpa.

Cold rolled vs hot rolled sheet steel. 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 rolling is mainly used to produce simple cross sections or sheet metal. Alternatively cold rolled steel has sharp edges a very smooth surface texture and an oily or greasy feel to it. The steel is processed further in cold reduction mills where the material is cooled at room temperature followed by annealing and or tempers rolling.

There are three main visual differences between the two processes. Hot rolled steel is rolled or shaped at a high temperature while cold rolled steel is rolled at room temperature. When the hot rolled metal cools it will reconfigure making the finished product with a looser tolerance when compared to the cold rolled metal. Whereas cold rolled steel is processed in cold reduction mills followed by annealing and tempering.

Cold rolled has a smooth and shiny finish while hot rolled has a grey and scaly finish. Cold rolled steel is essentially hot rolled steel that has been through further processing. The main advantages of cold working are. Once hot rolled steel has cooled it is then re rolled at room temperature to achieve more exact dimensions and better surface qualities.

If the cold rolled product was annealed it will be easier to work than hot rolled material. First hot rolled steel coil is manufactured and later it is run through a mill which forms the coil into the steel sheet pile sections. Cold worked steels are typically harder and stronger than standard hot rolled steels. Cold rolled steel is essentially hot rolled steel that has had further processing.

Thus the yield strength of cold rolled steel is higher than that of hot rolled steel. The surface finish tolerance straightness and consistency of cold rolled steel will always be superior to hot rolled steel. Hot rolled steel involves rolling the steel above re crystallization temperatures. When to use hot rolled steel.

The smaller products are also much more tolerant than the larger hot rolled versions. This looser tolerance makes it easier to force the metal into a variety of different shapes. Basic difference between hot rolled and cold rolled steel is the way they are processed. In comparison a cold rolled steel product with the same chemical composition has a yield strength of 365 mpa.

Hot rolled steel is used in situations where precise shapes and tolerances are not required. Cold formed is manufactured in two steps. As such it is usually a bit more expensive. In this article we will compare hot rolled vs cold rolled steel sheets.