What are the differences between stainless steel 304 and 201 ?

The difference between stainless steel 201 and 304:

1. Specifications: The commonly used stainless steel plates are divided into two types: 201 and 304. The actual composition is different. 304 is better in quality, but expensive, and 201 is worse. 304 is imported stainless steel plate, 201 is domestic stainless steel plate.

2. The composition of 201 is 17Cr-4.5Ni-6Mn-N, which is a Ni steel grade and a substitute for 301 steel. It is magnetic after cold working and is used in railway vehicles.

3. The composition of 304 is 18Cr-9Ni, which is the most widely used stainless steel and heat-resistant steel. Used in food production equipment, Xitong chemical equipment, nuclear energy, etc.

4. 201 is high in manganese, the surface is very bright with dark light, and high in manganese is easy to rust. 304 contains more chromium, and the surface is matte and does not rust. The two can be compared together. The most important thing is that the corrosion resistance is different. The corrosion resistance of 201 is very poor, so the price is much cheaper. And because 201 contains low nickel, the price is lower than that of 304, so the corrosion resistance is not as good as that of 304.

5. The difference between 201 and 304 is the nickel content. Moreover, the price of 304 is relatively expensive now, generally close to 50,000 a ton, but 304 can at least guarantee that it will not rust during use. (Potion can be used for experiments)

6. Stainless steel is not easy to rust because the formation of chromium-rich oxides on the surface of the steel body can protect the steel body. The 201 material belongs to high manganese stainless steel with higher hardness, higher carbon and lower nickel than 304.

7. The composition is different (mainly from the aspects of carbon, manganese, nickel, and chromium to distinguish 201 and 304 stainless steel) steel grades carbon (C) silicon (Si) manganese (Mn) phosphorus (P) sulfur (S) Chromium (Cr) Nickel (Ni) Molybdenum Rod (Mo) Copper (Cu) AISI(304) ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.03 18-20 8-10 AISI(201) ≤0.15 ≤1.00 5.5-7.5 ≤0.05 ≤0.03 16-18 3.5-5.5