304 is a versatile stainless steel, which is widely used to produce equipment and machine parts that require good comprehensive performance (corrosion resistance and formability).
301 stainless steel shows a obvious hardening phenomenon during deformation and is used for various occasions requiring high strength.
302 stainless steel is essentially a variety of 304 stainless steel with higher carbon content, which can make it get higher strength by cold rolling.
302B is a kind of stainless steel with high silicon content. It has high resistance to high temperature oxidation.
303 and 303Se are respectively containing sulfur and selenium free cutting stainless steel, the main requirements for cutting and surface Guanghao high occasions. 303Se stainless steel is also used to make parts requiring hot upsetting, because under these conditions the stainless steel has good thermal machinability.
304L is a variety of 304 stainless steel with low carbon content, which is used for welding. The lower carbon content makes the carbide precipitated in the heat affected zone near the weld to the minimum, and the precipitation of carbide may lead to intergranular corrosion of stainless steel in some environments (welding erosion).
304N is a nitrogen - containing stainless steel, which is used to improve the strength of the steel.
305 and 384 stainless steel contains high nickel, and its processing and hardening rate is low. It is suitable for various occasions with high requirements for cold forming.
308 stainless steel is used to make welding rods.
The content of nickel and chromium in 309, 310, 314 and 330 stainless steel is higher, which is to improve the oxidation resistance and creep strength of steel at high temperature. 30S5 and 310S are the varieties of 309 and 310 stainless steel, and the different only carbon content is low, so that the carbide precipitated near the weld is reduced to the least. 330 stainless steel has a particularly high anti carburizing ability and thermal shock resistance.
The 316 and 317 types of stainless steel contain aluminum, so the resistance to point corrosion in marine and chemical industry is much better than that of 304 stainless steel. Among them, type 316 stainless steel consists of low carbon stainless steel 316L, high strength stainless steel 316N containing nitrogen, and easy cutting stainless steel 316F with high sulfur content.
321, 347 and 348 are stainless steel which are stabilized with titanium, niobium, tantalum and niobium. It is suitable to be used as a welding member at high temperature. 348 is a kind of stainless steel, which is suitable for nuclear power industry. It has a certain limit on the amount of tantalum and cobalt.
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