In recent years, the chromium-manganese 200 series nickel-saving austenitic stainless steel has developed rapidly in China, and its market share in 2003 reached 15%. However, it is worth noting that, because 200 series stainless steel is only suitable for general use and resistant to weak corrosive media, its performance cannot completely replace 300 series stainless steel. In addition, due to improper selection of materials and other circumstances, the 200 series stainless steel also has some problems in its use. In addition, there is no market for shoddy and deceiving users, which has a certain negative impact on the promotion of nickel-saving stainless steel. Therefore, we must pay attention to the reasonable selection and purchase of nickel-saving stainless steel.
Application of 202 Stainless Steel in Medical Equipment, Food Equipment, Papermaking Equipment
200 series stainless steel can meet the needs of a considerable field and has a certain substitution effect on the traditional 304 markets. Judging from the application practice in the Guangdong market, it can be used in almost all product fields under non-corrosive and weakly corrosive conditions, and the field is quite wide. Relevant domestic experts have also done experiments during the development of 201 in the past, and they concluded that it can completely replace 304 under weak corrosive conditions.
From the perspective of the civilian field of stainless steel, the application fields where it is used under non-corrosive or weakly corrosive conditions are also very extensive, and with the improvement of people’s living standards, this application field may be further expanded.
200 series, 300 series, and 400 series-different series of stainless steel products have different price levels because of their different cost, use ranges, and performance. Generally speaking, the 400 series does not contain nickel, so the price is lower; the 200 series contains a small amount of nickel and higher manganese, so the price should be higher than the 400 series, but it should be much cheaper than the 300 series with higher nickel content.
In summary, we believe that 202 cold rolling is more suitable for civil appliances instead of 304. The use of 202 hot rolling in medical equipment, food equipment, and papermaking equipment also depends on the environment in which these equipment are used. For example, some medical equipment is not suitable if it is used in a highly corrosive environment and often comes into contact with some acid and alkaline chemicals.
But theoretically speaking, 202 stainless steel is feasible for medical equipment, food equipment, and papermaking equipment, but 304 is ideal. 202 is basically just a substitute for 304 in terms of material usage, and its performance will not exceed 304. If there are advantages, it can only be said that the price of 202 stainless steel is cheaper than 304, and the manufacturing cost is relatively cheap.
The disadvantage is that it has low corrosion resistance compared to 304 stainless steel 202. If used in a corrosive environment, the service life is shorter, easy to damage, and even not suitable for production.