Cold drawn seamless steel pipe: tube blank, heating, perforation, heading, annealing, pickling, oiling, multi-pass cold drawing, blank tube, heat treatment, straightening, hydrostatic test, marking, storage.
The surface quality, appearance and dimensional accuracy of cold-rolled steel sheets are superior to those of hot-rolled sheets, and their products are thin, so they are favored by users. Deep processing of products with cold-rolled steel coils as a substrate has become a high value-added product. Such as electro-galvanizing, hot-dip galvanizing, fingerprint-resistant electro-galvanizing, color-coated steel coils and vibration-damping composite steel sheets, etc., so that these products have excellent quality, high corrosion resistance and other excellent quality, have been widely used.
The cold rolled steel coil is subjected to finishing after annealing, including cutting, tailing, trimming, leveling, leveling, rewinding, or longitudinal shearing. Cold rolled products are widely used in automobile manufacturing, home appliances, instrument switches, construction, office furniture and other industries. The weight of each package after the steel plate is 3 to 5 tons.