Taiyuan Iron and Steel Co. has successfully smelted super austenitic stainless steel 904L, which is widely used in wastewater treatment, chemical industry, paper and other manufacturing industries. Super austenitic stainless steel 904L belongs to high chromium, nickel, molybdenum containing cooper kind of ultra low carbon steel. It has good corrosion resistance and has been dependent on import all long, is a state shortage steel.