Difference Between Hot Rolled And Cold Rolled Steel Sheet

Hot rolling is a mill process which involves rolling the steel at a high temperature typically at a.

Difference between hot rolled and cold rolled steel sheet.

Whereas cold rolled steel is processed in cold reduction mills followed by annealing and tempering. As an example a hot rolled steel product may have a yield strength of 235 mpa. In this article we will compare hot rolled vs cold rolled steel sheets. As you might suspect the manufacturing process behind cold rolled steel is a bit different.

Hot rolled steel actually reconfigures itself during the cooling process giving the finished product looser tolerances than the original material and when compared to cold rolled steel products. This lack of knowledge concerning the two types of steel is more common than you would think. In terms of finishing as well both the hot rolled steel and the cold rolled steel are different. In comparison a cold rolled steel product with the same chemical composition has a yield strength of 365 mpa.

Despite the name this process refers to steel that is pressed with the pressure of a roller at room temperature. Hot rolled steel has a rough blue grey finish whereas cold rolled steel has a smooth grey finish. In cold rolled steel final rolling is done when the steel is cooled to the room temperature. The main advantages of cold working are.

In hot rolled steel final rolling is done when the steel is hot. Hot rolled steel comes with a scaly surface slightly rounded edges and corners and the surface is non oily. But cold rolled steel undergoes additional processing steps resulting in improved properties that can be exploited for different applications. Hot rolled steel involves rolling the steel above re crystallization temperatures.

Thus the yield strength of cold rolled steel is higher than that of hot rolled steel. The hot rolled steel comes in plus minus 0 01 inches or even more than that. Difference between hot rolled steel and cold rolled steel hot rolled steel. Compared to hot rolled steel cold rolled steel has a nearly 20 increase in strength through the use of strain hardening.

Basic difference between hot rolled and cold rolled steel is the way they are processed. In size as well the hot rolled and the cold rolled steel are different. Cold rolled steel has an oily or greasy finish very smooth surface and very sharp edges. On the other hand the cold rolled steel comes with a shiny blue grey surface and square corners.

The hot rolled steel comes with a rough blue grey finish and rounded corners. It is also used to produce sheet metal. Cold rolled steel is essentially hot rolled steel that has had further processing. One important difference to understand is hot rolled steel and cold rolled steel.

Both hot rolled steel and cold rolled steel start out in essentially the same way and both can have the same grades and specifications.