(1) Due to a certain degree of work hardening, cold-rolled steel plates have low toughness, but can achieve a good yield-to-strength ratio and are used to cold-bend spring sheets and other parts. At the same time, because the yield point is closer to the tensile strength, so during use There is no foresight of danger, and accidents are likely to occur when the load exceeds the allowable load.

(2) The cold plate is cold-rolled and has no oxide scale on the surface and is of good quality. Hot-rolled steel plates are hot-rolled and have oxide scale on the surface and vary in plate thickness.

(3) Hot-rolled steel plates have poor toughness and surface smoothness and are relatively low-priced, while cold-rolled steel plates have good stretchability and toughness, but are more expensive.

(4) Rolling is divided into cold-rolled and hot-rolled steel plates, with the recrystallization temperature as the distinguishing point.

(5) Cold rolling: Cold rolling is generally used to produce strips, and its rolling speed is relatively high. Hot rolled steel plate: The temperature of hot rolling is similar to that of forging.

(6) The surface of the hot-rolled steel plate without electroplating is dark brown, and the surface of the cold-rolled plate without electroplating is gray. After electroplating, it can be distinguished by the smoothness of the surface. The smoothness of the cold-rolled steel plate is higher than that of the hot-rolled steel plate.