Corrosion resistance of the hottest stainless stee

Corrosion resistance of various stainless steels

304 is a kind of universal stainless steel, which is widely used to make equipment and parts requiring good comprehensive performance (corrosion resistance and formability)

301 stainless steel shows obvious work hardening during deformation, which is used in various occasions requiring high strength

302 stainless steel is essentially a variant of 304 stainless steel with higher carbon content, which can obtain higher strength by cold rolling

302b is a 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, which are used in occasions where free cutting and surface gloss are mainly required. 303se stainless steel is also used to make machine parts that need hot heading, because under such conditions, this kind of stainless steel has good heat resistance and should be fastened in time; Processability

304l is a variant of 304 stainless steel with low carbon content, which is used in occasions requiring welding. The low carbon content minimizes the precipitation of carbides in the heat affected zone near the weld, and the precipitation of carbides may lead to intergranular corrosion (welding corrosion) of stainless steel in some environments

304n is a kind of stainless steel containing nitrogen. Nitrogen is added to improve the strength of steel

305 and 384 stainless steels contain high nickel, and their work hardening rate is low. They are suitable for various occasions with high requirements for cold formability

308 stainless steel is used to make welding rods

309, 310, 314 and 330 stainless steels have relatively high nickel and chromium contents in order to improve the new production and construction projects of the company under high temperature, including the oxidation resistance and creep strength of 15000 ton battery grade lithium carbonate project. 30s5 and 310S are variants of 309 and 310 stainless steel, but the difference is that the carbon content is low, so as to minimize the carbide precipitated near the weld. 330 stainless steel has particularly high resistance to carburization and thermal shock, which also makes the sample slip during the experiment.

316 and 317 stainless steel contain aluminum, so the resistance to pitting corrosion in marine and chemical industrial environments is much better than 304 stainless steel. Among them, the variants of type 316 stainless steel include low-carbon stainless steel 316L, high-strength stainless steel 316N containing nitrogen, and free cutting stainless steel 316F with high sulfur content

321, 347 and 348 are stainless steels stabilized with titanium, niobium plus tantalum and niobium respectively, which are suitable for welding components at high temperatures. 348 is a kind of stainless steel suitable for nuclear power industry, which has certain restrictions on the amount of tantalum and drill