In recent years, stainless steel 304 plates have become more and more popular. Compared with 304 stainless steel plates, the corrosion resistance of 201 stainless steel plates is relatively weak. It is not recommended to be used in the often humid and cold ecological environment or the Pearl River Delta region. It is mainly used in relatively low temperature and dry areas. For the design and decoration industry with low regional and quality requirements, 304 stainless steel plate has good corrosion resistance and can often be used in relatively humid provinces or southeast coasts, such as Guangdong, Fujian, Zhejiang and other coastal cities. Perhaps because of the difference in corrosion resistance, the price of 201 is lower than that of 304 stainless steel plates, so some bad sellers who take advantage of loopholes will pretend to be 304 stainless steel plates and sell them to the outside world to obtain large profits. Such shoddy may bring many safety risks to buyers.

Just how to judge 201 and 304 stainless steel plates without anti-counterfeiting marks? The following three methods are provided to teach you to easily distinguish 201 and 304 stainless steel plates:

1. The surface of 201 and 304 stainless steel plates is generally subsurface. Therefore, when it is judged by human eyes and hand touch: 304 stainless steel plate has a good glossiness and shine, and the hand touch is smooth, while 201 stainless steel plate is dark and has no gloss, and the touch is rough and uneven. Feel. In addition, wet your hands with water and touch the two stainless steel materials respectively. After touching, the water-stained fingerprints on the 304 board are easier to erase, but the 201 is not easy to erase.
2. Use a grinder to install the grinding wheel and gently grind and polish the two boards or plates. When grinding, the sparks of the 201 material are longer, thicker, and more, whereas the sparks of the 304 material are shorter, thinner, and less. When grinding, the force should be lighter, and the two types of grinding force should be the same, so that it is easy to distinguish.
3. Apply stainless steel pickling paste to two kinds of stainless steel plates respectively. After 2 minutes, look at the change of the color of the stainless steel at the smeared part. The color is dark for 201, and the white or unchanged color is for 304 stainless steel plate.