Difference Between Hot And Cold Sheet Steel

The smaller products are also much more tolerant than the larger hot rolled versions.

Difference between hot and cold sheet steel. Compared to hot rolled steel cold rolled steel has a nearly 20 increase in strength through the use of strain hardening. Whereas cold rolled steel is processed in cold reduction mills followed by annealing and tempering. In comparison a cold rolled steel product with the same chemical composition has a yield strength of 365 mpa. As you might suspect the manufacturing process behind cold rolled steel is a bit different.

Hot rolled steel is rolled or shaped at a high temperature while cold rolled steel is rolled at room temperature. Thus the yield strength of cold rolled steel is higher than that of hot rolled 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. The following are some of the key differences in hot rolled vs cold rolled steel.

Hot rolled steel involves rolling the steel above re crystallization temperatures. Hot rolled steel comes with a scaly surface slightly rounded edges and corners and the surface is non oily. When approaching a company for a quote on material costs for producing a product you will want to know the differences between metals. This lack of knowledge concerning the two types of steel is more common than you would think.

In other words understanding the differences between hot and cold rolled steel will help designers and engineers achieve better results and at the best price possible. Cold rolled has a smooth and shiny finish while hot rolled has a grey and scaly finish. Cold rolled steel has an oily or greasy finish very smooth surface and very sharp edges. 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.

Basic difference between hot rolled and cold rolled steel is the way they are processed. In this article we will compare hot rolled vs cold rolled steel sheets. The main advantages of cold working are. As an example a hot rolled steel product may have a yield strength of 235 mpa.