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Performance characteristics of 304 stainless steel plate

As the most widely used stainless steel heat resistant steel, food equipment, general equipment, nuclear energy industry equipment.304 is the most common type of steel, corrosion resistance, heat resistance, low temperature strength, good mechanical properties.Deep stamping, bending and other room temperature processing performance is better, after heat treatment without Eaton stainless steel sleeve joints will harden.Family with 1, 2, west tableware, Sink, interior piping, water heater, bath crock, boiler, automobile spare parts (window wiper, muffler), chengdu all types of stainless steel rapid joint medical machinery, building materials, chemical, food industry, textile industry, dairy industry, ship spare parts (non-magnetic, using temperature: - 196-800 ℃)

304,C≤0.08 Ni8.00 ~ 10.00 Cr18.00 ~ 20.00, Mn<=2.0 Si<= 1.0s <=0.030 P<=0.045

304LC≤0.03 other elements and 304 same stainless steel joint material description

316 stainless steel plate

316 stainless steel plate is under the United States standard brand, belong to rust, heat, corrosion resistant steel, is austenitic stainless steel, for the national standard is 0Cr17Ni12M yonghua stainless steel joint o2.Is better than 304 stainless steel, in seawater and other various media, corrosion resistance is better than 0Cr19Ni9, mainly pitting corrosion resistance material.   

C≤0.08 Ni10.00 ~ 14.00 Cr16.00 ~ 18.00, Mo2.00---3.00 Mn<=2.0 Si<= 1.0s <=0.030 P<=0.035

Stainless steel 201 304 difference

Specification: commonly used stainless steel plate is divided into 201 and 304 two types, west safety type nozzle universal joint is actually the composition is different,

304 is better in quality, but more expensive, 201 is worse.

304 is imported stainless steel plate,201 is domestic stainless steel plate.

201 is the replacement of section Ni steel, section 301.Magnetic after cold processing, used in railway vehicles.

304 is the most widely used stainless steel, heat resistant steel.Used in food production equipment, general chemical equipment, nuclear energy and so on.

201 is high manganese, the surface is very bright with dark bright, high manganese easy to rust.304 contains more chromium, the surface appears matte, not rust, two put together there is a comparison.The most important is different corrosion resistance, 201 corrosion resistance is very poor, jiangsu all models of stainless steel straight through joint so the price will be a lot cheaper.Since 201 contains less nickel, the price is lower than 304, so the corrosion resistance is not as good as 304.

The difference between 201 and 304 yonghua stainless steel hydraulic joint is the nickel problem.And the price of 304 is relatively expensive now, generally close to 50,000 a ton, but 304 at least can ensure that the process of use will not rust.(experiment can be done with potions)

Stainless steel is not easy to rust because the surface of the steel body formed rich chromium oxide can protect the steel body, 201 material belongs to high manganese stainless steel, compared with 304 hardness, high carbon and low nickel.

Different components (mainly from carbon, manganese, nickel and chromium to distinguish 201 and 304 stainless steel)

Steel number carbon (C) silicon (Si) manganese (Mn) phosphorus (P) sulfur (S) chromium (Cr) nickel (Ni) molybdenum (Mo) copper (Cu)

AISI (304) 0.08 1.00 2.00 0.045 0.0318 or less or less or less or less or less - 208-10

AISI (201) of 0.15 or less 1.005.5-7.5 or less acuities were 0.05, 0.0316-183.5-5.5 or less

400 series - ferrite and martensitic stainless steel:

408: good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.

409: cheapest type, usually used as a car exhaust pipe, of ferritic stainless steel (chromium steel).

410: martensite (high strength chromium steel), good abrasion resistance, poor corrosion resistance.

416: sulfur was added to improve the processing property of the material.

420: "blade grade" martensite steel, also used in surgical knives, can be made very bright.

430: ferrite, used for decoration, such as car accessories.Good molding, but poor temperature resistance and corrosion resistance.

440: high strength cutting tool steel, slightly higher carbon content, after appropriate heat treatment can obtain a higher yield strength, hardness can reach 58HRC, is one of the hardest stainless steel.The most common example is the razor blade.


People often think magnet adsorption stainless steel, verify its advantages and disadvantages and authenticity, do not attract no magnetic, think it is good, genuine;The person that suck has magnetism, think it is counterfeit fake.In fact, this is a very one-sided, not practical wrong method of discrimination.

Stainless steel of various types, at room temperature according to the structure can be divided into several categories:

Austeniform: such as 304, 321, 316, 310, etc.

Martensite or ferritic body type: such as 430, 420, 410, etc.

Austenite bodies are nonmagnetic or weakly magnetic, martensite or ferrite are magnetic.

Usually used as decorative tube plate stainless steel is mostly 304 austenitic body material, generally speaking is no magnetic or weak magnetic, but because of smelting caused by chemical composition fluctuations or processing state different may also appear magnetic, but this can not be considered as counterfeit or unqualified, what is the reason?

As mentioned above, austenite is non-magnetic or weak magnetic, while martensite or ferrite is magnetic. Due to composition segregation or improper heat treatment during smelting, a small amount of martensite or ferrite structure in austenite 304 stainless steel will be caused.Thus, 304 stainless steel will have a weak magnetic.

In addition, 304 stainless steel after cold processing, the structure will also be transformed into martensite, the greater the degree of cold processing deformation, the more martensite transformation, the greater the magnetic strength of the steel.As a number of steel strip, the production of Φ 76 tube, no obvious magnetic induction, Φ 9.5 tube production.Due to the large deformation of the cold bending, the magnetic sensitivity is more obvious. The deformation of the square rectangular tube is larger than that of the round tube, especially for the corner part, the deformation is more intense and magnetic.

In order to completely eliminate the magnetism of 304 steel caused by the above reasons, it is possible to restore the stability of austenite structure through high temperature solid solution treatment, thus eliminating the magnetism.

In particular, due to the above reasons caused by 304 stainless steel magnetic, and other materials of stainless steel, such as 430, carbon steel magnetic completely is not the same grade, that is to say 304 steel magnetic always show is weak magnetic.

This tells us, if the stainless steel with weak magnetic or completely no magnetic, should be distinguished as 304 or 316 material;If the same as the magnetic steel, shows strong magnetic, because the distinction is not 304 material


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