1. Development status

According to the definition in GB / t20878-2007, stainless steel is a steel with rust resistance and corrosion resistance as its main characteristics, with chromium content of at least 10.5% and carbon content of no more than 1.2%.

Stainless steel not only has good corrosion resistance, but also has the characteristics of beautiful surface, high finish, high strength, easy processing and good welding performance. It is widely used in automobile, aviation, machinery, construction, household appliances, kitchen appliances and other fields. With the rapid development of downstream application fields, it promotes the rapid development of stainless steel market, In 2021, China's crude stainless steel output reached 30.632 million tons, an increase of 490000 tons over 2020, a year-on-year increase of 1.64%.

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Among them, the output of Cr Ni steel (300 Series) in China reached 15.067 million tons in 2021, accounting for 49.19% of the total output of stainless steel crude steel in China, accounting for the largest proportion; The output of Cr Mn steel (200 Series) has reached 9.058 million tons, accounting for 29.57% of the total output of stainless steel crude steel in China; The output of Cr steel (400 Series) has reached 6.267 million tons, accounting for 20.46% of the total output of stainless steel crude steel in China; The output of duplex stainless steel reached 240600 tons, accounting for 0.79% of the total output of stainless steel crude steel in China.

In recent years, China's apparent consumption of stainless steel has increased rapidly. In 2021, China's apparent consumption of stainless steel reached 26.101 million tons, an increase of 490000 tons over 2020, a year-on-year increase of 1.93%. China's output of stainless steel is greater than consumption, and some products are mainly used for export.

China's stainless steel export volume is significantly larger than the import volume. China is one of the important exporters of stainless steel in the world. In 2021, China's stainless steel import volume reached 2.927 million tons, an increase of 1.122 million tons compared with 2020; The export volume reached 4.461 million tons, an increase of 1.0441 million tons over 2020.