In the stainless steel industry, 201 represents a material. 201 stainless steel refers to 201 stainless steel and acid resistant steel. 201 Stainless steel refers to steel resistant to weak medium corrosion such as atmosphere, steam and water, while acid resistant steel refers to steel resistant to chemical etching medium corrosion such as acid, alkali and salt, and the national standard model is 1Cr17Mn6Ni5N.
201 stainless steel has certain acid and alkali resistance, high density, polishing without bubbles, no pinholes and other characteristics. It is used to produce various watch cases and strap bottom cover materials. It is mainly used to make decorative tubes, industrial tubes and some shallow stretched products.
202 is an American standard brand, replacing 1Cr18Ni9. Austenitic stainless steel is characterized by high transformation temperature, so it can be used as heat-resistant steel. To make austenitic stainless steel undergo phase transformation, it must be heated to more than 1000 ℃. At 350 ℃, there will be no change in the metallographic structure, that is, there will be no fundamental change in the properties of the steel. It will only expand due to heating, but the change is small and can be ignored under normal circumstances. Therefore, 202 stainless steel has good high temperature resistance. Because of its performance, 202 stainless steel is widely used in building decoration, municipal engineering, highway guardrail, hotel facilities, shopping malls, glass handrails, public facilities and other places.
