Stainless steel is a long hollow circular steel 316l stainless steel, mainly used in petroleum, chemical, medical, food, light industry, machinery and instruments and other industrial pipes and mechanical structural components. Also stainless steel pipes, bending, torsional strength, lighter weight, so it is widely used in the manufacture of mechanical parts and engineering structures. Also used in producing a variety of conventional weapons, stainless steel exports are an important part of China's export economy, its driving China's economic growth has an important role in the stainless steel pipe, however, from the current situation of China's foreign trade of stainless steel, the country's steel exports in case to a greater resistance. Barrel, shells and so on. American Iron and Steel Institute with three digits to indicate a variety of standard grade stainless steel malleable. Where: ① austenitic stainless steel 200 and 300 series of numerals, ② ferritic and martensitic stainless steel 400 series numbers. Such as 304 stainless steel, some of the more common austenitic stainless steel is 201, 304, 316 and 310 marks, ③ ferritic stainless steel is marked 430 and 446, and 440C martensitic stainless 410,420 marked, duplex (austenitic - ferritic), ④ stainless steel, precipitation hardening stainless steel and high alloy iron content below 50% usually uses proprietary name or trademark name stainless steel pipes | Shengda Po-commerce (certified) | stainless steel pipe provided by the Tianjin Shengda Bao Jie Trading Company. Bao Jie Tianjin Shengda Trading Company (www.sdbjsm.com) (http://www.sdbjsm.com) is Tianjin, hardware leader, over the years, the company implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. Shengda Po-commerce leader in the staff warmly welcome all inquiries negotiations to create Shengda Po-commerce a better future. You can also access (http://www.sdbjsm.com/supply_details_42401815.html), for more information about the company.