In life, we often deal with stainless steel, and among stainless steel, 201 and 304 are the two most common grades. Relatively speaking, 304 is more high-quality, such as the kitchen utensils that we usually eat, and the 201-grade stainless steel. Relatively speaking, it is more economical, and 201 is mainly used in decoration, decoration, and other fields. Many non-professionals don't particularly understand their real difference!
The carbon content of 201 is relatively high, and 304 contains almost no carbon. In terms of toughness, 304 is better than 201. 201 is relatively hard and 304 is relatively soft. Although 304 is relatively soft, it is also a soft strip, which is a bit Like our Chinese Taijiquan, it seems that the softness is actually very powerful. 304 contains nickel, which also makes its corrosion resistance much better than 201. As the so-called stainless steel, it is not a steel that does not rust, but a steel that is not easy to rust. Although the price of 304 is higher than that of 201, the overall cost performance is still very advantageous.
For the identification of 304 stainless steel and 201 stainless steel, predecessors have also summed up various methods. For example, some people talk about the way of smearing with special potions, and some people talk about grinding with an angle grinder and observing the form of sparks. The sparks are big. It is 201 stainless steel, and the spark is small and short is 304 stainless steel. In fact, it is possible to use potion identification, use a grinder, a pickle, and other methods, but these require the use of tools or other chemicals. Participation, if it is in a very sudden situation, or if the site needs to be identified temporarily, is there any good method? In this case, I can tell you that it can also be identified by visual observation.
How to identify 201 stainless steel and 304 stainless steel by the naked eye? 304 stainless steel is more glossy, but the surface looks very natural, and 201 stainless steel is generally brighter now, but because of the later process treatment It looks closer to 304, so the natural sheen of 304 is always not achieved. These require the accumulation of experience, as long as you have more contact, you will become more and more discerning!