Difference between 304 Stainless Steel Pipe and 321 Stainless Steel Pipe

304 stainless steel pipe widely used in the work requires a good overall performance of the mechanical parts and equipment, which contains 9% nickel, 19% chromium, for nuclear energy, jewelry production equipment, general equipment, stainless steel, heat-resistant steel The most widely used.

Stainless steel has a beautiful surface and corrosion resistance, corrosion resistance in the chemical corrosive medium or air is a high alloy steel, it can exert the inherent surface properties of stainless steel without the need for surface treatment such as plating, use in many aspects of steel, the representative performance of 18-8 chrome-nickel steel, 13 chrome steel and other high-alloy steel. Because stainless steel contains chromium, it reacts with natural media to form a thin film of chromium and acts as a corrosion-resistant material. Steel must contain more than 12% chromium to maintain the inherent corrosion of stainless steel.

321 stainless steel seamless pipe is used to manufacture locomotive boiler with superheated steam pipe, small pipe, pipe and arch pipe and a variety of structural low and medium pressure boiler overheating boiling water pipe, steam pipe. It is mainly used to make high pressure and steam pressure above the boiler tube with alloy steel structure, high-quality carbon structural steel and stainless steel heat-resistant steel seamless pipe. Steel pipes must have high oxidation resistance, high strength of achievement, and good tissue stability because these pipes often work under high temperature and pressure, and these boiler tubes are oxidized by high-temperature steam and flue gas And corrosion.

321 stainless steel tube finished steel pipe grain size, decarburization and microstructure have certain requirements, in order to determine the groundwater, underground rock formation, natural gas, mineral resources and oil situation, the use of drilling rig drilling; oil drilling and geology Drilling seamless steel pipe.

304 stainless steel tube equivalent to China's 0Cr19Ni9 stainless steel tube, which is produced in accordance with the United States ASTM standard stainless steel a brand.