Hot Rolled Vs Cold Rolled Sheet Metal

For example consumer electronics and telecom products metal furniture automobile industry etc.

Hot rolled vs cold rolled sheet metal. As an example a hot rolled steel product may have a yield strength of 235 mpa. During this process the metal shrinks as it cools which can cause some slight warpage. 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. Each type of steel has its advantages and disadvantages and costs for the two types of steel are also different.

Hot rolled steel sheets are used in fabrication work where aesthetics and quality are not very important. 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 worked steels are typically harder and stronger than standard hot rolled steels.

Hot rolled products like hot rolled steel bars are used in the welding and construction trades to make railroad tracks and i beams for example. This is why the tolerance for hot roll steel is looser than cold rolled steel. Once hot rolled steel has cooled it is then re rolled at room temperature to achieve more exact dimensions and better surface qualities. The rolls induce plastic deformation.

Hot rolling and cold rolling are two methods of shaping steel. During the hot rolling process steel is heated to its melting point while being worked changing the composition of the steel to make it more malleable. Cold rolled steel is essentially hot rolled steel that has had further processing. Thus the yield strength of cold rolled steel is higher than that of hot rolled steel.

Cold rolled steel is essentially hot rolled steel that has been through further processing. Hot rolled steel is used in situations where precise shapes and tolerances are not required. In comparison a cold rolled steel product with the same chemical composition has a yield strength of 365 mpa. Both hot rolled steel and cold rolled steel start out in essentially the same way and both can have the same grades and specifications.

Hot rolled steel also tends to be cheaper than cold rolled steel because of the reduced tolerances and slightly lower strength.