How to judge 304 and 201 stainless steel pipes?

The 304 stainless steel water supply pipe has stronger safety factor performance than other tap water pipes, and its wear resistance is more in line with the requirements. At the current stage of unevenness, the price of stainless steel water pipes on the market is naturally high and low due to different raw materials. As a general consumer, how do you distinguish between 304 and 201 stainless steel pipes? Below I will use three methods to teach you the difference between 304 and 201 stainless steel pipes:
1. Look at the anti-counterfeiting mark on the stainless steel tube. Stainless steel pipes are generally marked with anti-counterfeiting marks, specifically on the body of the pipe fittings on one of the sides. Generally, there will be an anti-counterfeiting mark in the middle of 60~100 cm. The anti-counterfeiting marks generally contain such content: Raw materials of stainless steel pipes, manufacturers or famous brands of stainless steel pipes.
2, 304 and 201 stainless steel pipes, the surface is generally matt. According to the way people see and touch: 304 stainless steel tube has good smoothness and shine, and the hand touch is very smooth; 201 stainless steel plate is dark in color and has no smoothness, and it will feel uneven when touched. . In addition, when the hands are wet with water, touch two kinds of metal materials, and the water-stained fingerprints left after touching, the 304 stainless steel plate is relatively easy to wipe off, and the 201 is not easy to wipe off.
3. Use the polishing machine to install the polishing sheet and slowly polish the two kinds of plates or pipes. When polishing, the flame of the 201 raw material is longer, thicker and more, while the flame of the 304 raw material is shorter, thinner and less. Remember to use light force when grinding and polishing, and keep the amplitude and direction as consistent as possible.