What are the differences between hot rolled steel plates and cold rolled steel plates?

The hot rolled steel plates have low hardness, easy processing and good ductility. The cold rolled steel plates have high hardness and are relatively difficult to process, but they are not easy to deform and have high strength.

Hot rolled steel plates have relatively low strength and poor surface quality (with low oxidation finish), but good plasticity, generally medium-thick plates, cold-rolled steel plates have high strength, high hardness, and high surface finish, generally thin plates, which can be used for stamping plate.

The mechanical properties of hot rolled steel plates are far inferior to cold working and second to forging processing, but they have better toughness and ductility.

Cold-rolled steel plates have a certain degree of work hardening and low toughness, but they can achieve a better yield ratio. They are used for cold-bending spring plates and other parts. At the same time, because the yield point is closer to the tensile strength, there is no danger during use. Accidents are prone to occur when the load exceeds the allowable load.

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