Among the 3 series stainless steel welded pipes, which stainless steel pipe is more resistant to corrosion?

Among the 3 series stainless steel welded pipes, which stainless steel pipe is more resistant to corrosion? 2020-01-07 　　 Many people have many questions about the corrosion resistance of stainless steel welded pipes when they buy stainless steel welded pipes. For example, which stainless steel welded pipe is more resistant to corrosion? Today, the editor of the stainless steel welded pipe manufacturer summarizes the performance of the 3 series stainless steel welded pipe. 304 stainless steel welded pipe 　　 301 stainless steel shows obvious work hardening during deformation, and is used in various occasions requiring higher strength.　　302 stainless steel is essentially a variant of 304 stainless steel with higher carbon content, which can be made to obtain higher strength by cold rolling.　　302B is a kind of stainless steel with high silicon content, which has high resistance to high temperature oxidation.　　303 and 303Se are free-cutting stainless steels containing sulfur and selenium, respectively, and are used in occasions that mainly require free cutting and high surface gloss.　　303Se stainless steel is also used to make parts that require hot heading, because under such conditions, this stainless steel has good hot workability.　　304 is a versatile stainless steel, which is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability).　　304L is a variant of 304 stainless steel with lower carbon content, used in occasions where welding is required. The lower carbon content reduces the precipitation of carbides in the heat-affected zone near the weld, and the precipitation of carbides may cause stainless steel to produce intergranular corrosion (welding erosion) in certain environments.　　304N is a nitrogen-containing stainless steel. Nitrogen is added to increase the strength of the steel.　　305 and 384 stainless steels contain higher nickel, and their work hardening rate is low. They are suitable for various occasions that require high cold formability.　　308 stainless steel is used to make electrodes.　　 309, 310, 314 and 330 stainless steels have relatively high nickel and chromium content in order to improve the oxidation resistance and creep strength of the steel at high temperatures. The 309S and 310S are variants of the 309 and 310 stainless steels. The difference is that the carbon content is lower in order to reduce the carbides precipitated near the weld. 330 stainless steel has particularly high carburization resistance and thermal shock resistance. 316 stainless steel welded pipe 　　 316 and 317 stainless steel contain aluminum, so the resistance to pitting corrosion in marine and chemical industrial environments is much better than that of 304 stainless steel. Among them, the 316 stainless steel variants include low-carbon stainless steel 316L, nitrogen-containing high-strength stainless steel 316N, and free-cutting stainless steel 316F with a higher amount of sulfur.　　321, 347, and 348 are stainless steel stabilized with titanium, niobium plus tantalum, and niobium, respectively, and are suitable for welding components used at high temperatures. 348 is a kind of stainless steel suitable for the nuclear power industry, and has certain restrictions on the combined amount of tantalum and cobalt.　　 The above is the relevant common sense of stainless steel welded pipe performance compiled by the editor of Guangdong stainless steel pipe manufacturer. I hope it can be helpful to everyone.