Difference Between Hot And Cold Sheet Steel

Hot rolled steel comes with a scaly surface slightly rounded edges and corners and the surface is non oily.

Difference between hot and cold sheet steel.

The difference is not in their specifications or grade but in how they are processed at a mill. Cold rolling steel allows for the creation of very precise shapes. For example consumer electronics and telecom products metal furniture automobile industry etc. Hot rolling is a mill process which involves rolling the steel at a high temperature typically at a.

Compared to hot rolled steel cold rolled steel has a nearly 20 increase in strength through the use of strain hardening. In cold rolled steel final rolling is done when the steel is cooled to the room temperature. This lack of knowledge concerning the two types of steel is more common than you would think. When you choose metals for a job it s important you know how the hot rolled and cold rolled steel are different.

Hot rolled steel is rolled or shaped at a high temperature while cold rolled steel is rolled at room temperature. In comparison a cold rolled steel product with the same chemical composition has a yield strength of 365 mpa. Hot rolled steel has a rough blue grey finish whereas cold rolled steel has a smooth grey finish. As an example a hot rolled steel product may have a yield strength of 235 mpa.

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. For example railway track automotive frames structural frames low accuracy sheet metal parts etc. Whereas cold rolled steel sheets are used for precision and quality fabrication work. Cold rolled steel has an oily or greasy finish very smooth surface and very sharp edges.

When forming metal it has to go through a process called rolling. The rolls induce plastic deformation. It s through a series of breakdown semi finishing sizing semi roughing roughing and finishing that cold rolled steel shapes can be created. The basic difference between.

Hot rolled steel sheets are used in fabrication work where aesthetics and quality are not very important. One important difference to understand is hot rolled steel and cold rolled steel. The difference between hot rolled and cold rolled steel is this recrystallization point. Cold rolling is done when the metal is able to form new grains as the old ones are deformed by rolling and bending the metal.

Cold rolled has a smooth and shiny finish while hot rolled has a grey and scaly finish. In hot rolled steel final rolling is done when the steel is hot. Cold rolled steel is essentially hot rolled steel that has had further processing.