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How to identify the material of stainless steel pipe?
How to identify the material of stainless steel pipe?

The material of stainless steel pipe is the basis for determining the quality of stainless steel pipe. 316 stainless steel pipe has the best corrosion resistance performance, followed by 304 stainless steel pipe. The material of 201 stainless steel pipe is slightly worse than 304 stainless steel pipe. Stainless steel pipe is difficult to distinguish with the naked eye, so how do we recognize it? What about the material of the stainless steel pipe? The editor of the 304 stainless steel pipe manufacturer summarizes the following methods for everyone: Magnetic test: The magnetic properties of 316 and 304 are too small.

  1. Nitric acid point test: It is the most intuitive test method to test the corrosion resistance of the substrate through the nitric acid point test. Generally, a good stainless steel tube will only be slightly corroded during the test, and the stainless steel tube with the lowest corrosion resistance will have Obvious traces of corrosion.
  2. Stainless steel measuring solution: also called stainless steel tube detection potion. The surface of the stainless steel tube is guaranteed to be free of stains. After grinding off the surface coating, point a drop of the measuring solution to remove the coating, observe the color change of the stainless steel in the test area, and compare the color of the stainless steel or the time it turns red. .
  3. Observed by sparks: Through sparks and hardness during cutting or welding, it is also possible to distinguish the advantages and disadvantages of stainless steel pipe materials.

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