Features and application of stainless steel of various grades:

200 series stainless steels are low nickel and high manganese stainless steels with nickel content of 4%~6% and manganese content of 8% or so.As the intercrystal corrosion resistance and corrosion resistance ability is significantly lower than 300 series stainless steel, 200 series stainless steel is the biggest advantage of the low price relative to 300 series stainless steel.On the premise of weak decay, 202 stainless steel can almost completely replace 304 stainless steel, the other 200 series of stainless steel with austenitic steel non-magnetic characteristics, appearance is similar to 304, often in the market with a good, fake "304" sales phenomenon;

Stainless steel 202: On the premise of weak decay, stainless steel 202 can almost completely replace stainless steel 304, widely used in architectural decoration, municipal engineering, highway guardrail, hotel facilities, shopping malls, glass handrails, public facilities and other places;

Performance characteristics and Application introduction of all grades of stainless steel (finally sorted)

301 Stainless steel: good ductility, used for forming products, can also be machined to harden, good weldability, wear resistance and fatigue strength is better than 304 stainless steel;

302 stainless steel: corrosion resistance is the same as 304, corresponding to the domestic brand 1Cr18Ni9, due to the relatively high carbon content and therefore better strength, often used for building decorative components;

303 Stainless steel: free-cutting stainless steel containing sulphur and selenium, used mainly in applications requiring free-cutting and high surface finish, most suitable for automatic lathes, bolts and nuts;

Performance characteristics and Application introduction of all grades of stainless steel (finally sorted)

304 stainless steel: stainless steel is the most common material in the stainless steel, density is 7.93 g/cm3, also known as 18/8 stainless steel in the industry, high temperature 800 degrees, with good processing performance, high toughness, widely used in the industrial and furniture decoration industry and food and medical industry;

309 stainless steel: compared with 304 has better temperature resistance, steel production is more 309S stainless steel, corrosion resistance, high temperature performance is better;It can withstand high temperature of 980°C and is mainly used in boiler, chemical industry and other industries. Compared with 309S, 309 does not contain sulfur S content.

316 stainless steel: after 304, the second most widely used steel, due to the addition of Mo element, its corrosion resistance, and high temperature strength has been greatly improved, high temperature resistance can reach 1200-1300 degrees, can be used under harsh conditions;Corrosion resistance: corrosion resistance is better than 304 stainless steel, pulp and paper in the production process has a good corrosion resistance.316 stainless steel is also resistant to Marine and corrosive industrial atmospheres.316 stainless steel national brand (06Cr17Ni12Mo2) has good oxidation resistance.In the range of 427°C-857°C(800°F-1575°F), it is best not to continuously use 316 stainless steel, but in the temperature range outside the continuous use of 316 stainless steel, the stainless steel has good heat resistance;

316L stainless steel: better resistant to carbide precipitation than 316 stainless steel, available in the above temperature range.The biggest difference in usage lies in the ultra-low carbon of 316L. Therefore, it is not easy to precipitate 316L carbon and combine chromium into chromium carbide during welding, which can reduce the corrosion phenomenon of welding part.

321 stainless steel: its properties are similar to 304 except that the addition of titanium reduces the risk of weld corrosion.

408 stainless steel: good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni;

409 stainless steel: cheapest model (Anglo-American), usually used as a car exhaust pipe, of ferritic stainless steel (chromium steel);

Stainless steel 410: Martensite (high strength chromium steel), good wear resistance, poor corrosion resistance;

416 stainless steel: sulfur added to improve the processing performance of the material, free cutting martensitic stainless steel, can be strengthened through heat treatment, 416 strength and machinability than 304 and 316 good, small friction coefficient, stainless steel low carbon content, corrosion resistance is good, but corrosion resistance is not as good as 304 and 316;

420 stainless steel: "cutting tool grade" Martensitic steel, with a certain wear resistance and corrosion resistance, hardness is higher characteristics, similar to Brinell high chromium steel this first stainless steel.It is also used in surgical knives and can be made very shiny.420 stainless steel is suitable for all kinds of precision machinery, bearings, electrical, equipment, instruments, meters, transportation tools, household appliances, etc.Used for manufacturing parts and components resistant to atmospheric, water vapor, water and oxidizing acid corrosion;

Performance characteristics and Application introduction of all grades of stainless steel (finally sorted)

430 stainless steel: ferritic stainless steel, it is a universal steel with good corrosion resistance, better thermal conductivity than austenite, smaller thermal expansion coefficient than austenite, heat resistance fatigue, add stabilizing element titanium, good mechanical properties of weld joints.430 Stainless steel for automotive accessories, building decoration, fuel burner parts, household appliances, appliances components;

430F stainless steel: steel with free cutting performance on 430 steel, mainly used for automatic lathes, bolts and nuts, etc.

440 stainless steel: high strength cutting tool steel, with slightly higher carbon content, after appropriate heat treatment can obtain higher yield strength, hardness can reach 58HRC, belongs to the hardest stainless steel.The most common example is the razor blade.There are three commonly used models: 440A, 440B, 440C, and 440F (easy to process);

443 stainless steel: is a ferritic stainless steel, now generally used to replace 304, rust resistance and processing performance is equal to 304, at present in electrical appliances, utensils, kitchen equipment, elevator, oven production and other fields of comprehensive promotion;

Series 500: Heat-resistant chromium alloy steel;

Series 600: Martensite precipitation hardening stainless steel;

630: The most commonly used precipitation hardened stainless steel model, usually also called 17-4;4% 17% Cr, Ni,