Supply of high-strength bolts of high-strength steel bolts, fasteners Yongnian County Bowen specializes in processing high-strength bolts, we have advanced technology, excellent equipment, high-tech assembly line, is a professional supplier of high-strength bolts, reasonable prices, complete specifications , allow you to buy rest assured useful products. SP impurity elements, their presence along the grain boundary segregation produce, resulting in the grain boundary embrittlement of high strength bolts, impairing the mechanical properties of the steel, high-strength bolts factory should minimize, as P less than or equal 0.030%, S less than or equal 0.035% . Supply of high-strength bolts, fasteners Yongnian County Bowen specializes in processing high-strength bolts, we have advanced technology, excellent equipment, high-tech assembly line, it is a professional supplier of high-strength bolts, reasonable price, complete specifications standard high-strength bolts , allow you to buy rest assured useful products. 8.8 and 8.8S is the same level. Ordinary bolt force performance and calculation methods and high-strength bolts are affected by the difference. The first force is applied to high-strength bolts through its internal pre-tension P, then generate frictional resistance between the contact surfaces to be joined to withstand the external load, and ordinary bolt is directly subjected to external loads. Specifications of high strength bolts, high strength bolts Hebei manufacturers recommend | Bowen (certified), high-strength bolts by Yongnian County Bowen fasteners. Yongnian County Bowen fasteners (www.bwjgj.com) is Handan, fasteners leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Bowen fastener leadership with the staff warmly welcome all inquiries negotiations to create Bowen fastener better future.