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What Is The Difference Between Stainless Steel 304 And 201?

Jun 24, 2021

In the eyes of many consumers, 304 stainless steel plates and 201 stainless steel plates are almost indistinguishable from each other, and they are almost indistinguishable by the naked eye. Here are some ways to distinguish between 304 and 201 stainless steel plates.

stainless steel

1.Specifications: The commonly used stainless steel plates are divided into two types, 201 and 304. In fact, they are different in composition. 304 is of better quality, but the price is more expensive, and 201 is worse.

2.The composition of 201 is 17Cr-4.5Ni-6Mn-N, which is an alternative to Ni-saving steel grade and 301 steel. After cold working, it has magnetism and is used in railway vehicles. 

3.The composition of 3 and 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 has high manganese content, the surface is very bright with dark and bright, high manganese content is easy to rust. 304 contains more chromium, the surface is matte and does not rust. The two are 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. Also, because 201 stainless steel plate contains low nickel, the price is lower than that of 304 stainless steel plate, so the corrosion resistance is not as good as 304. 

5.The difference between 201 and 304 stainless steel plate is the nickel content. Moreover, the price of 304 is relatively expensive and fluctuates with the fluctuation of nickel price. However, the increase in nickel content can ensure that the anti-corrosion and rust resistance of 304 is better than that of 201 stainless steel. It can be said that 304 stainless steel plate basically does not grow during use. rust. (Use stainless steel potion for experiment)

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

7.Different composition (mainly distinguishing 201 and 304 stainless steel plate from the aspects of carbon, manganese, nickel, and chromium)

Steel grade Carbon (C) Silicon (Si) Manganese (Mn) Phosphorus (P) Sulfur (S) Chromium (Cr) Nickel (Ni) Molybdenum (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