304 stainless steel is an internationally used food-grade austenitic stainless steel, containing more than 18% chromium and more than 8% nickel (I. e., "18-8" stainless steel), with excellent corrosion resistance and oxidation resistance, and is widely used in tableware, kitchenware, Medical equipment and other fields.

201 stainless steel is a nickel-saving stainless steel, manganese and nitrogen to replace part of the nickel, nickel content is usually less than 1%, chromium content of about 16%-18%, low cost but corrosion resistance is significantly weaker than 304.

The core difference between the two lies in: first, the composition is different, the 304 nickel content is high, 201 manganese is used instead of nickel; Second, there is a significant difference in corrosion resistance, which 201 easy to rust in humid or salty environment. Third, the magnetic performance is different. 304 are usually non-magnetic or weak magnetic, while 201 have certain magnetic properties. Fourth, they are 304 suitable for food contact and high corrosion scenes, 201 mostly for decorative pipes, doors and windows and windows in dry environments. It is recommended to distinguish by potion detection or viewing the material report when purchasing.