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Stainless steel is often divided into martensitic steel, ferritic steel, austenitic steel, austenitic-ferritic (duplex) stainless steel and precipitation hardening stainless steel according to the state of organization. In addition, it can be divided into: chromium stainless steel, chromium nickel stainless steel and chromium manganese nitrogen stainless steel.

The body, cover and contact materials in the stainless steel reactor are mainly made of 0Cr18Ni9 (S30408), 00Cr17Ni14Mo2 (S31603), 0Cr18Ni10Ti (S32168), or 2205, 2507 and other materials.

Stainless steel has good corrosion resistance and can withstand a variety of acids, alkalis and organic media. The inner and outer surfaces can be pickled and passivated according to the needs of customers to form an oxide film and strengthen the anti-corrosion function. For the inner surface of the kettle with polishing requirements, it can reach the level of mirror polishing.