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Use of Products: These products are mainly used to produce cold-formed parts of automobile (Housing). It has of uniform-chemical composition, low percentage of harmful elements, high purity, slight decarburization, good surface quality. They also has characteristics of spheroidize anneal easily in course of heat treatment, low percentage of cracks in cold heading, tight tolerance, uniform hardness. The progeny of “the development of cold-formed steel for car” had been identified by Hebei province in 2008. The experts agrees the following: The product quality that produced with middle-small converter has achieved international advanced level. Now the products have been used in international famous cars largely.