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  The GSWRCH35K-W produced by Xingtai Steel can meet the requirements of customers for widmanstatten structure, the steel by changing the controlled cooling technology to achieve the goal of reducing widmanstatten structure. A customer of Xingtai Steel uses this steel to produce 8.8 grade fasteners. The customer reflects that the product has stable chemical composition, uniform organization and good cold heading performance, which can meet the requirements of customers.