Through comparison, quickly distinguish 201, 304, 430 stainless steel
Through comparison, quickly distinguish 201, 304, 430 stainless steel

The stainless steel models in China are represented by element symbols and numbers, such as 1Cr18Ni9, 0Cr18Ni9, 00Cr18Ni9, 1Cr17, 3Cr13, 1Cr17Mn6Ni5N, etc. The numbers indicate the corresponding element content.

  1. The difference of steel type marking

Common stainless steel models are often represented by numerals, including 200 series, 300 series, and 400 series. They are American representation methods, such as 201, 202, 302, 303, 304, 316, 410, 420, 430, etc. The American Iron and Steel Institute is Use three digits to indicate all kinds of standard grade stainless steel. among them:

①Austenitic stainless steel is marked with 200 and 300 series numbers,

②Ferritic and martensitic stainless steels are represented by numbers in the 400 series. For example, some of the more common austenitic stainless steels are marked with 201, 304, 316 and 310,

③Ferritic stainless steel is marked with 430 and 446, and martensitic stainless steel is marked with 410, 420 and 440C, duplex (austenite-ferrite),

④Stainless steel, precipitation hardening stainless steel and high alloys with iron content less than 50% are usually named by patent names or trademarks.

  1. Functional difference:

304 is a versatile and widely used stainless steel material. It is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability). It can withstand general rust in the building, resist the erosion of food processing media (but corrosion may occur in high temperature conditions containing concentrated acid and chloride components), and resist organic compounds, dyes and a wide variety of inorganic compounds. Type 304L (low carbon), good resistance to nitric acid, and durable medium temperature and concentration of sulfuric acid, widely used as liquid gas storage tanks, low-temperature equipment (304N), appliances and other consumer products, kitchen equipment, hospital equipment, transportation Tools, wastewater treatment equipment.

  1. Type 430 has a lower content of alloy than type 304. It is used for high-polishing decoration in a mild atmosphere, and can also be used as nitric acid and food processing equipment.
  2. The difference between stainless steel 201 and 304:
  3. Specifications: The commonly used stainless steel plates are divided into two types, 201 and 304. In fact, they are different in composition. 304 is of better quality, but the price is more expensive, and 201 is worse. 304 is imported stainless steel plate, and 201 is domestic stainless steel plate.
  4. The composition of 201 is 17Cr-4.5Ni-6Mn-N, which is an alternative to Ni-saving steel and 301 steel. After cold working, it has magnetism and is used in railway vehicles.
  5. The composition of 304 is 18Cr-9Ni, which is the most widely used stainless steel and heat-resistant steel. Used in food production equipment, Xitong chemical equipment, nuclear energy, etc.
  6. 201 has high manganese content, and the surface is very bright with dark and bright, and high manganese content is easy to rust. 304 contains more chromium, the surface is matte and does not rust. Putting the two together makes a comparison. The most important thing is that the corrosion resistance is different. The corrosion resistance of 201 is very poor, so the price is much cheaper. Because 201 has low nickel content, the price is lower than that of 304, so the corrosion resistance is not as good as 304.
  7. The difference between 201 and 304 is the nickel content. And the price of 304 is now more expensive, generally close to 50,000 a ton, but 304 can at least guarantee that it will not rust during use. (You can experiment with potions)
  8. Stainless steel is not easy to rust because the chromium-rich oxide formed on the surface of the steel body can protect the steel body. Material 201 is a high-manganese stainless steel with a higher hardness than 304, high carbon and low nickel.

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  • Mr.Tian 09:26.AM  Aug.03,2022
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