Two chromium manganese stainless steel application development climax in history is caused due to Ni as a strategic resource reserves, but this kind of steel in the core of the rapid growth of China and India is due to its low cost, cost is so low, mainly reflected in the nickel content is low, part of the nickel to replace by manganese; the European company and France's many years ago on the development and production of stainless steel chromium manganese, chromium manganese they develop the nickel content is in commonly 4% above, have a relatively good performance; the current market sales of the 1%Ni 200 corrosion resistance is very poor, much lower than the 304 (stainless steel), below 430 (ferritic stainless steel), so the industry generally are not in favor of Cr-Mn stainless steel production l% content a lot of entering the market, should consider the Cr Mn development with high Ni, such as the 201 series 5%Ni+Cu grades, the corrosion resistance of Cr-Mn stainless steel this type of close to 304 grade level.