Cangzhou Bohai Steel Pipe Co., Ltd. specializes in producing standard elbow 16Mn 16Mn standard, 16Mn is the old national standard GB / T1591-1988 high-strength low-alloy structural steel grades sold steel elbow, the new national standard GB / T1591-2008 in grades for the Q345 (Q345 have five quality grades, Q345A ~ Q345E) alloy steel elbow, Q345A corresponding to the ASTM grade is Gr · 50.16Mn hardness: 16Mn HRC hardness can not bend steel prices generally 140HBS , if you must use HRC conversion, 140/10 on the line 16mn seamless steel pipe size and grade to allow Cangzhou Bohai Pipe Co., Ltd. specializing in the production of alloy steel elbow a. Process Overview p22 cold drawn (rolled) seamless steel pipe: round tube → heating → perforation → Heading → annealing → pickling → oiled (copper) → multi-pass cold drawn (cold) → billet tube → heat treatment → straightening → hydrostatic test (testing) → mark → storage. Production of alloy steel elbow, Cangzhou Bohai (certified), alloy steel elbow Ltd provided by Cangzhou Bohai tube. Cangzhou Bohai Tube Co., Ltd. (www.czbh628.com) (www.hbbh628.com) is an industry leader in Cangzhou, Hebei, three, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. Cangzhou Bohai leadership with the staff warmly welcome all inquiries negotiations to create a better future Cangzhou Bohai.