Stainless steel is a common metal material we see, it has the characteristics of corrosion resistance and not easy to rust. Among them, the two most common materials are 201 stainless steel and 304 stainless steel. Their characteristics can be distinguished from the following points
1. Physical properties
304 stainless steel is a universal stainless steel material, its anti-rust performance is stronger than that of 200 series stainless steel material, and it is resistant to high temperature of 600 degrees. It has excellent stainless corrosion resistance and good resistance to intergranular corrosion. It also has good corrosion resistance to alkaline solutions and most organic and inorganic acids.
201 stainless steel has the characteristics of certain acid and alkali resistance, high density, no bubbles and no pinholes in polishing. Mainly used for decorative pipes, industrial pipes, and some shallow-stretched products.
2. Chemical properties
The composition of 201 is 17Cr-4.5Ni-6Mn-N, which is a Ni steel grade and a substitute for 301 steel. 201 is high in manganese, the surface is very bright with dark and bright, and the high manganese content is easy to rust.
304 is composed of 18Cr-9Ni, which is the most widely used stainless steel and heat-resistant steel. 304 contains more chromium, the surface is matte, and it is not easy to rust.
3. Comprehensive comparison
Because of the difference in chemical composition, 304 stainless steel is more corrosion-resistant than 201 stainless steel, less likely to rust, and the price is higher than 201 stainless steel; but because of its smooth surface and high brightness, it is also easy to care for and maintain in the later stage; In terms of service life, 304 stainless steel shelters are also much longer than 201 stainless steel.