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The material Q55SiCrA-1 produced by Xingtai Steel can bear withstand larger alternating load, Downstream customers use this product to produce automobile suspension spring,and the Mubea reflects that the raw materials in such aspects at strength,elasticity and hardenability has good pormance,The suspension spring used this steelhas been successfully applied in fawVolkswagen,Beijinghyundai,domestic and foreign well-known automobile manufactures such as BMW in Germany.