How to distinguish between 304 stainless steel and 201 stainless steel?
The method to distinguish 304 stainless steel and 201 stainless steel: 1. The difference in fatigue strength: 201 stainless steel has higher strength, but its toughness is not as good as 304 stainless steel, so 304 stainless steel has a slightly higher fatigue strength. 2. The difference in overall quality: The overall quality of 304 stainless steel plate is better, and the price is slightly higher than that of 201 stainless steel plate, and the quality of 201 is slightly worse. 304 stainless steel plate is made of imported steel, while 201 is made of domestic steel. 3. The difference of formed steel: The main composition of 201 stainless steel plate is 17Cr-4.5Ni-6Mn-N, which is a kind of Ni-shaped steel, which is an alternative to 301 steel. After a certain period of cold working, magnetism will be obtained and used in railway vehicles. 304 stainless steel plate is processed into 18Cr-9Ni, which is the most widely used stainless steel plate and heat-resistant steel plate in the market. Generally used in food processing equipment, various chemical production equipment, nuclear power and nuclear energy industry, etc. 4. The difference between manganese element and nickel element content: 201 stainless steel plate contains higher manganese element, and the surface of the steel plate is bright and has a dull light, but it is easier to rust if the manganese content is high. However, the chromium content of 304 stainless steel plate is relatively high, and the surface of the general steel plate will appear matt, and it is not easy to rust. The most important aspect of the two steel plates is the difference in corrosion resistance. The overall corrosion resistance of 201 is low, it is easy to be corroded, and the price will be much cheaper. Moreover, the nickel content of 201 is low, and the price is lower than that of 304 stainless steel. The biggest difference between 201 stainless steel plate and 304 stainless steel plate is the problem of nickel. However, the price of 304 is slightly more expensive, and 304 stainless steel plate can at least be kept in any use without rusting.