In the eyes of many consumers, there is almost no difference between 304 stainless steel and 201 stainless steel, and it is difficult to distinguish with the naked eye. Here are some ways to differentiate between 304 and 201. The shape of the spark can be seen by grinding on the surface of the stainless steel plate. The spark of 201 stainless steel is relatively loose and thick, and the spark of 304 stainless steel is uniform and forms a straight line.
We can also judge whether it is 201 or 304 stainless steel through the potion. Put a drop on the stainless steel surface and scratch the surface protection layer. After a while, if it is a 201 stainless steel plate, the potion dripping on the surface is displayed in red, but it is 304.
In addition, there is a spectrometer detection method, which is a relatively simple and fast method.
1. Different specifications: commonly used stainless steel plates are divided into two types: 201 and 304. In fact, the composition is different. The 304 is better quality but expensive, and the 201 is even worse. 304 is imported stainless steel plate, and 201 is domestic stainless steel plate.
2. Different chemical formulas: The chemical formula of 201 is 1cr17mn6ni5304, and the chemical formula of 06cr19ni10; the main difference between them is the nickel-chromium alloy. 304 is 19 chrome and 10 nickel, while 201 is 17 chrome and 5 nickel.
3. Different properties: Due to the different nickel content, the corrosion resistance of 201 is much lower than that of 304, and the acid and alkali resistance is not as good as 304. Since 201 has a higher carbon content than 304, 201 is harder and more brittle than 304, and 304 is more ductile. Generally speaking, there will be obvious scratches on the surface of 201 with a hard knife, but the scratches on 304 will not be obvious.
As we know, stainless steel sheets are divided into different types. Different scenarios use different types of stainless steel plates. It is mainly based on carbon, manganese, nickel, chromium and other aspects to distinguish whether the stainless steel plate is 201 or 304.
In summary, the above is the main content of how to distinguish 304 and 201 stainless steel plates. Because 304 stainless steel is imported steel, 304 stainless steel is more expensive and better quality than 201 stainless steel in price and quality!