201 stainless steel is a 200 series austenitic stainless steel developed by replacing manganese, nitrogen and other elements with nickel. It has good corrosion resistance and hot and cold processing functions, which is sufficient to replace the indoor, inland cities and outdoor use. 304 stainless steel products used in low corrosive environments.
Because the price of nickel continues to fluctuate, many producers are looking for alternative products of austenitic stainless steel with similar functions to 304 stainless steel. In the early 1930s, the original chromium-manganese austenitic stainless steel was produced, and manganese in steel replaced some nickel. After that, more research was conducted on the detailed composition share, nitrogen and copper were used, and elements such as carbon and sulfur, which severely affected the data function, etc., finally made the 200 series available.
Currently, the main types of 200 series stainless steel are: J1, J3, J4, 201, 202. There are also 200 steel grades that have a lower control of nickel content. As for 201C, it is an 201 stainless steel extension steel grade developed by a single steel plant in China in the later period. The national standard trademark of 201 is: 1Cr17Mn6Ni5N. 201C continues on the basis of 201 Reduce nickel content and add manganese content.
201 stainless steel usage
Because 201 stainless steel has the characteristics of acid resistance, alkali resistance, high density, polishing without bubbles, and no pinholes, it is very suitable for producing various cases and strap bottom covers, and many others are used for decoration pipes, Some shallow drawn products for industrial pipes.
201 stainless steel chemical composition
The elements of 201 stainless steel plate have manganese and nitrogen instead of some or all of the nickel element. Because it may produce lower nickel content and the ferrite is not balanced, the ferrochrome content in 200 series stainless steel is reduced to 15% -16 %, Some conditions have dropped to 13% -14%, so the corrosion resistance of 200 series stainless steel cannot be compared with 304 or other similar stainless steels. In addition, under the acidic conditions that are common in the corroded parts of the accumulation area and the gap, the effect of manganese and copper will be reduced and the effect of re-passivation under some conditions. The damage rate of chromium-manganese stainless steel under these conditions is about 10-100 times that of 304 stainless steel. And because in practice production often cannot accurately control the remaining sulfur and carbon content in these steels, the data cannot be traced and traced, even when the data is recovered. So if it is not stated that they are chromium-manganese steels, they will become a very risky scrap steel mix, which will cause the casting to contain unexpectedly high manganese content. Therefore, these stainless steels and 300 series stainless steels must not be replaced or exchanged. The two are completely at the same level in terms of corrosion resistance.
Post time: Jan-19-2020