201 stainless steel plate turns red for five seconds

There are many types of stainless steel, such as 201, 202, 301, 304, and 316. The biggest difference between these materials is rigidity, hardness and corrosion resistance. The corrosion resistance of 316 is the best, and the worst is 201. The price of all grades of stainless steel is the highest at 316.

Stainless steel with poor quality will discolor surface after being used for a long time. It is easy to be stained by oil, water, etc. It is difficult to clean, easy to be rusted, and easy to breed bacteria.
 
 Identify the quality of stainless steel can not just look at the surface, but also to see whether the internal "presence" to the shopping site to buy a few dollars a bottle of "stainless steel test solution" can be. "Stainless steel measuring fluid" is also called "stainless steel potion", "manganese detection box" and "manganese testing fluid". Test method: clean the stainless steel surface to ensure no stain; wear off the surface coating and then drop a drop of the test solution on the deplating layer (the deplating layer is best selected at the edge of the cut, observe the color change of the stainless steel in the test area; compare the color or redness of stainless steel The time roughly determines the grade of stainless steel.
 
      Six kinds of stainless steel surface will have a color change depending on the length of time.
 
      Fake 201 stainless steel: It turns red in about 5 seconds, and after 10 seconds, the red color is the same as on the color card.
      201 Stainless Steel (Authentic 201) Turns red in about 50 seconds, and the red color is the same as on the color chart.
      202 stainless steel: It turns red in about 1 minute.
      301 stainless steel: It turns red in about 3 minutes. The color is very light. Look carefully.
      304 stainless steel: No change in 3 minutes, the color may darken but there is no red color.
      316 stainless steel: No color change is seen for about 10 minutes.