GMW3399M-ST-S-CR450T/250Y-DP Automobile steel general CR490T/290Y CR590T/280Y

Cold-rolled, hot-rolled steel coil for raw material, after acid pickling to remove oxide skin for cold rolling, the finished product is hard, because of cold work hardening caused by deformation of continuous cold rolling hard roll strength, increase hardness, toughness and plastic index decreased, so the stamping performance will deteriorate, can only be used for simple deformation of the parts. Hard roll can be used as a galvanizing plant materials

Cold rolling can also be called cold-rolled coil and cold-rolled coil in the industry. The origin of these names is because of the classification of cold-rolled products. Cold-rolled products are divided into two main categories: cold plates and cold coils. Cold sheets can also be called cold rolled sheets and cold rolled sheets; cold rolled sheets can be called cold rolled coils and cold rolled sheets. In addition, cold rolling also includes some relatively few varieties, such as cold-rolled box plate, cold-rolled hard plate, cold-rolled sheet, etc. These two categories are mainly named because of their different shapes and materials. Of course, due to the different manufacturers of steel, the name of the manufacturer is sometimes added to the name, such as Baosteel cold coil, Tangshan cold plate and so on. Cold-rolled thin coils can be equivalent to cold coils, and with different habits in different places, the sayings are also different. With the difference of cold-rolled specifications, it must be divided into more detailed classifications, which depends on which type of cold-rolled product belongs to which specification. For example, SPCC cold-rolled coil is the name of a cold-rolled coil.

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