Many people will not distinguish between 201 and 304 stainless steel. Let me share with you the identification method.

(1) 201 stainless steel contains manganese, but 304 does not; in terms of color, 201 stainless steel will be darker than 304 because of manganese, and 304 will be whiter and brighter, but this is not easy to distinguish with the naked eye.

(2) Because of the different nickel content, the corrosion resistance of 201 is far less than that of 304; the acid and alkali resistance of 201 is not as good as that of 304; because the carbon content of 201 is higher than that of 304, 201 is harder and brittle than 304, and 304's The toughness is better, scratching the surface of 201 with a hard knife will generally have obvious scratches, but the scratches on 304 will not be obvious.

(3) There is a stainless steel detection potion on the market now, which can be distinguished in a few seconds by dropping a few drops. This potion is particularly convenient. The principle is to make the elements contained in the material and the substances in the identification potion A chemical reaction occurs to generate a colored substance, and the method is very convenient, accurate and feasible. At present, this identification potion can be bought on the Internet, but it is difficult to buy in the market.

(4) Spectrometer detection method, this method is fast and accurate, but the price of spectrometer is expensive. Generally, individuals will not buy a spectrometer for detection to buy some materials; if the material is very important and the element content is very high, you can find a special For testing companies, they generally have spectrometers.