Cold rolled steel is generally harder and stronger than standard hot rolled steel.
Cold rolled steel is basically a steel grade that is processed after hot rolling. Hot-rolled steel is cooled and then rolled at room temperature to obtain more accurate dimensions and better surface quality.
Cold rolled steel is generally used to describe a range of finishing processes, but technically speaking, cold rolling is only applicable to extruded steel plates between rolls. If the rod or tube pull out of the steel die should be pulled out, not rolled. Other cold finishing processes include turning, grinding and polishing for converting existing hot-rolled billets into a better product.
The surface properties of cold rolled steel are better than those of hot rolled steel. Therefore, it is not surprising that cold rolled steel is commonly used for more accurate technical applications or designs. However, due to the cold finished product, the price will be higher.
In terms of physical properties, cold-rolled steel is generally harder and stronger than standard hot-rolled steel. The hardness, tensile fracture resistance and deformation resistance of the steel are due to low temperature forming, and work hardening increases its strength.
However, these additional processing processes can also introduce internal stresses into the material. Unexpected deformation can occur if the stresses are not removed before cutting, grinding and welding the steel.
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