The QSWRCH35K-B produced by Xingtai steel has stable chemical composition, good cold heading performance and excellent surface quality. It has been certified by a mainframe factory in China and used to manufacture automobile headlamp support bolts. Customers reflect the metallographic structure, non-metallic inclusions, mechanical properties and other performance indicators of QSWRCH35K-B materials of Xingtai steel can meet the requirements of the products.