Because 201 stainless steel is cheaper than 304 stainless steel, some pressure barrel manufacturers often use 201 material as 304 material for online sales. Some peers have a deeper routine. The barrel body is made of 304 material, while the barrel cover and bottom are made of 201 material. The price is very low and the quality is greatly discounted. This lead users to distinguish stainless steel pressure. Types of 201 and 304 stainless steel in barrels
1. Firstly, the chemical formula of 201 is 1Cr17Mn6Ni5, 304 is 06Cr19Ni10. Their chemical composition determines their different characteristics. 201 and 304 have different nickel and chromium contents, 304 is 18 chromium and 8 nickel, and 201 is 0.8 nickel. Because the corrosion resistance and acid-alkali resistance of 201 are not as good as 304, users can depend on their resistance. The acid-base degree is used to distinguish the type of stainless steel pressure barrel.
2.201 stainless steel contains manganese but 304 does not. Because 201 contains manganese, it will rust in humid and salty air for a long time, while 304 will not rust. Judging from the color, 201 stainless steel contains manganese, so the color will be darker than 304.
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