304 stainless steel material concentration ≤65% below the boiling temperature of nitric acid in a stainless steel pipe fittings, with strong corrosion resistance. Most of the alkali solution and organic and inorganic acids also have good corrosion resistance. In the air or chemical corrosion medium can resist a high-alloy steel, stainless steel is a beautiful surface and good corrosion resistance, without going through the plated surface treatment, play inherent in the surface properties of stainless steel, for use in multi- aspect of a stainless steel pipe of steel, commonly referred to as stainless steel. Representative of the performance of 13 chrome steel, chrome-nickel steel alloy 18-8 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 as a marker 316l stainless steel pipe, 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 tube, Billion Po-commerce (certified) stainless steel tube is provided by Tianjin Bao Jie Shengda Trading Company. Bao Jie Tianjin Shengda Trading Company (www.sdbjsm.com) is Tianjin, hardware leader, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shengda Po-commerce leader in the staff warmly welcome all inquiries negotiations to create Shengda Po-commerce a better future.