Difference Between Hot Rolled And Cold Rolled Sheet Metal

There are some fundamental differences between these two types of metal.

Difference between hot rolled and cold rolled sheet metal. In this article we will compare hot rolled vs cold rolled steel sheets. Hot rolled steel has rounded edges a rough surface texture and no grease on its finish. The dimensions of the final product are more precise and square with a sharper edge and cold rolled steel sheet can hold tighter tolerances than hot rolled when machined or otherwise fabricated. The differences between hot rolled steel and cold rolled steel relates to the way these metals are processed at the mill and not the product specification or grade.

Thus the yield strength of cold rolled steel is higher than that of hot rolled steel. Basic difference between hot rolled and cold rolled steel is the way they are processed. As an example a hot rolled steel product may have a yield strength of 235 mpa. Alternatively cold rolled steel has sharp edges a very smooth surface texture and an oily or greasy feel to it.

There are three main visual differences between the two processes. Furthermore cold rolled steel is considered to be more durable compared to hot rolled steel. Hot rolled steel involves rolling the steel at high temperatures where cold rolled steel is processed further in cold reduction mills where the material is cooled followed by annealing and or tempers rolling. In comparison a cold rolled steel product with the same chemical composition has a yield strength of 365 mpa.

Hot rolled steel involves rolling the steel above re crystallization temperatures. Nevertheless other advantages of cold rolling include a good finish a high rate of production and a fast molding speed. Whereas cold rolled steel is processed in cold reduction mills followed by annealing and tempering. The rolls induce plastic deformation.