Cold rolled steel pipe
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Cold rolling: Using hot-rolled steel coils as raw materials, after acid washing to remove oxide skin, cold rolling is carried out, and the finished product is rolled hard coil. Due to continuous cold deformation, the cold work hardening caused by cold deformation increases the strength and hardness of the rolled hard coil, and reduces the toughness and plasticity index. Therefore, the stamping performance will deteriorate, and it can only be used for parts with simple deformation. Rolled hard coils can be used as raw materials for hot-dip galvanizing plants, as hot-dip galvanizing units are equipped with annealing wires. The weight of the rolled hard coil is generally 6-13.5 tons, and the steel coil is continuously rolled on the hot-rolled acid washed coil at room temperature. The inner diameter is 610mm.
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