1. Stainless steel material national grade standard: stainless steel is commonly 201 and 304.
2. 201 is composed of 17Cr-4.5Ni-6Mn-N, which is a Ni-type steel and a substitute for 301 steel. It is magnetic after cold working. 201 has high manganese content, bright surface with dark brightness, and high manganese content is easy to rust. Very poor corrosion resistance.
3. 304 is composed of 18Cr-9Ni, which is the most widely used stainless steel and heat-resistant steel. Used in food production equipment, Xitong chemical equipment, nuclear energy, etc. 304 contains more chromium, the surface presents matte, no rust. Strong corrosion resistance.
