The 200 series of stainless steel mainly include the following types, which are based on the development of chromium-nickel-manganese austenitic stainless steel and are mainly used to replace some 300 series stainless steel to reduce costs. The following are some common 200 series stainless steel models and their characteristics:

1.201 (1Cr17Mn6Ni5N, SUS201)

1. Characteristics: acid and alkali resistance, high density, polishing without bubbles, no pinholes, etc.

2. Uses: Mainly used for decorative pipes, industrial pipes and some shallow drawing products.

2.202 (1Cr18Mn8Ni5N, SUS202)

1. Characteristics: Mn and N replace part of nickel, thus obtaining good mechanical properties and corrosion resistance. It is a new type of stainless steel that saves nickel. Its room temperature strength is higher than that of 304, and it has better oxidation resistance and medium temperature strength below 800 degrees.

2. Uses: Mainly used for decorative pipes, industrial pipes and some shallow drawing products.

In addition, there are some other 200 series models, such as 204, 205, etc. These models may have different standard names and chemical compositions in different countries and regions, but generally belong to the category of low-nickel austenitic stainless steel.
It is worth noting that although 200 series stainless steel has certain advantages in cost, its corrosion resistance is worse than that of 300 series stainless steel. Therefore, when choosing stainless steel materials, it is necessary to comprehensively consider the performance and cost of the materials according to the specific use environment and requirements.
In addition, with the continuous development of the stainless steel market, some counterfeit and inferior 200 series stainless steel products have also appeared on the market. These products often do not meet the standards in composition and performance, which brings losses to consumers. Therefore, when purchasing stainless steel products, it is recommended to choose products from regular channels and well-known brands to ensure the quality and performance of the products.