Supply of high-strength bolts, fasteners Yongnian County Bowen specializes in processing high-strength bolts, we have advanced technology and high-strength bolts specification, high-strength bolts price excellent equipment, high-tech assembly line, is a professional supplier of high-strength bolts high strength bolts Standard reasonable price, complete specifications, allowing you to buy rest assured useful products. In the part quenched when there is a tendency to promote grain growth, it is an appropriate increase in international basis, set at 0.45% - 0.80%. Si strengthens ferrite, prompting cold forming degrade performance, material elongation decreased as Si more than 0.30%. 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, is a professional supplier of high-strength bolts, reasonable price, complete specifications, allowing you to buy rest assured useful products. Bolt material: 18Cr2Ni4W, 25Cr2MoV steel; bolt size: M27 ~ M48. As such the steel easier to form a passive film on the surface, and this passivation film Bolt will not get good adhesion of electroless nickel phosphorus layer, it is necessary to take special action before the film is first removed. High-strength bolts, high strength bolts factory complete specifications | Bowen, high-strength bolts specifications are provided by Yongnian County Bowen fasteners. High-strength bolts, high strength bolts factory complete specifications | Bowen, high-strength bolts specification is Yongnian County Bowen fasteners (www.bwjgj.com) this year introduced a new upgrade, the above picture is for reference only, please call the contact or pictures on this page phone, for the latest information, contact: Guo Zhaofeng.