1, advantages
20 1 is the cheapest stainless steel. Chromium content is 16- 18, nickel content is only 0.3- 1.2, Lianzhong LH nickel content is about 0.3, L 1 nickel content is about 1, and La nickel content is earlier than 0.6.
The nickel content of 20 1 is low, only 0.08-0.3. There are many 20 1 calendered plates on the market, which are much cheaper. 20 1 There are many kitchen equipments, but not many tableware. The surface of 20 1 is slightly worse than that of 304, and the stamping performance is also poor.
2. Deficiencies
20 1 stainless steel generally has high manganese content, and its surface is basically bright and dark, so it is easy to rust when it contains high manganese content.
20 1 easy to rust, harmful to health. The content of Mn in 20 1 material is very high, which will lead to the precipitation of element ions harmful to health when food is placed and heated. 20 1 stainless steel has poor corrosion resistance and is generally used in low corrosion environment.
Difference and identification between 20 1 and 304 stainless steel;
The chemical composition of 20 1 and 304 stainless steel is quite different. The carbon content of 20 1 stainless steel is 0. 15%, which is 0.08% higher than that of 304 stainless steel and nearly twice as high. Therefore, the specified non-proportional tensile strength of 20 1 stainless steel is greater than 304 (201:275n/mm2,304.
There is little difference in Cr element between 20 1 and 304 stainless steel. The Cr content of 20 1 stainless steel is 16.00~ 18.00%, and that of 304 stainless steel is 18.00~20.00%.
However, the Ni content of 20 1 stainless steel is much smaller than that of 304 stainless steel. Ni content of 20 1 stainless steel is 3.50~5.50%, and that of 304 stainless steel is 8.00 ~1.00%, which is one of 20 1 stainless steel.
304 stainless steel is food grade stainless steel, and 20 1 stainless steel is non-food grade stainless steel. It is a nickel-saving stainless steel product, containing 3.5-5.5% nickel, 5.5-7.5% manganese and 0.05-0.25% nitrogen. It forms austenitic stainless steel by replacing part of nickel with nitrogen and manganese.
Refer to Baidu Encyclopedia -20 1 Stainless Steel for the above contents.