Stainless steel is a long hollow circular steel, mainly used in petroleum, chemical, medical, food, light industry, machinery and instruments and other industrial pipes and mechanical structural components. In addition, 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, however, from the current situation of China's foreign trade of stainless steel, the country's steel exports encountered a more large 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. For example, some of the more common austenitic stainless steel is 201, 304, 316 and 310 marks, ③ ferritic stainless steel is marked 430 and 446 stainless steel elevator handrails, and 440C martensitic stainless steel is 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 implement national policy of reform and opening up, the economy get the rapid growth of urban housing, public buildings and tourist facilities, build a large number of water supply and domestic water supply put forward new demands. In particular, water quality problems, there is a growing emphasis on the requirements are also rising. Galvanized steel pipe because the usual easy-corrosive, stainless steel elevator mill under the influence of national policies, will gradually fade into history stainless steel elevator car plates, pipes commonly used plastic pipe, composite pipe and copper pipe system became . But in many cases, the stainless steel pipe more advantages, especially in wall thickness of only 0.6 ~ 1.2mm thin-walled stainless steel pipe in high-quality drinking water systems, hot water systems and the safety, health and water supply system in the first place, with safe, reliable, environmental health, affordable and so on. Domestic and international engineering practice has proved to be one of the best overall performance of the water supply system, the new, energy-saving and environment-friendly pipe, but also a very competitive water pipe, is bound to improve water quality, improve people's living standards play no comparable to the role of stainless steel elevator handrails | Yuncheng stainless steel elevator | 20 years provided by the Tianjin Shengda Po-Po-Billion Trading Company. Bao Jie Tianjin Shengda Trading Company (www.sdbjsm.com) strong, credible, in Tianjin's daily hardware industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shengda treasure-commerce and you hand into the brilliant, for a better future!