Difference Between Hot Rolled And Cold Rolled Sheet Metal

Alternatively cold rolled steel has sharp edges a very smooth surface texture and an oily or greasy feel to it.

Difference between hot rolled and cold rolled sheet metal.

There are some fundamental differences between these two types of metal. Thus the yield strength of cold rolled steel is higher than that of hot rolled steel. In this article we will compare hot rolled vs cold rolled steel sheets. In comparison a cold rolled steel product with the same chemical composition has a yield strength of 365 mpa.

As an example a hot rolled steel product may have a yield strength of 235 mpa. Basic difference between hot rolled and cold rolled steel is the way they are processed. 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. The rolls induce plastic deformation.

When to use hot rolled steel. Some of the advantages of cold rolled steel definitely have to do with regards to product precision. Hot rolled steel has rounded edges a rough surface texture and no grease on its finish. 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.

Nevertheless other advantages of cold rolling include a good finish a high rate of production and a fast molding speed. Furthermore cold rolled steel is considered to be more durable compared to hot rolled steel. 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. Hot rolled steel involves rolling the steel above re crystallization temperatures.