Introduction of hot rolled steel plate and cold rolled steel plate

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

V Cold rolled steel plates have low toughness due to a certain degree of work hardening, but can achieve a better yield-to-strength ratio and are used to cold-form springs and other parts.

The cold rolled steel plate is cold-rolled and has no oxide scale on the surface, and the quality is good. The hot-rolled steel plate is hot-rolled and has oxide skin on the surface, and the thickness of the plate is different.

Hot-rolled steel plate has poor toughness and surface flatness, and the price is lower, while cold rolled steel plate has good elongation and toughness, but the price is more expensive

3. The surface of the hot rolled steel plate without electroplating is dark brown, and the surface of the cold rolled steel plate without electroplating is gray. After electroplating, it can be distinguished from the smoothness of the surface.

4.The strength of the hot rolled steel plate is relatively low, and the surface quality is poor (with oxidation and low finish), but the plasticity is good. Generally, the cold rolled steel plate has high strength, high hardness and high surface finish. It is generally a thin plate, which can be used as a plates for stamping.

5.Hot rolled steel plates are divided into two types: thick plates (thickness greater than 4mm) and thin plates (thickness of 0.35~4mm). Cold-rolled steel plates are only thin plates (thickness of 0.2~4mm).

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