The invention relates to Cr-Mn-N
austenite stainless steel. A proper amount of Mn and N are used to substitute expensive
nickel to produce a novel Cr-Mn-N steel grade for reducing the cost for materials and maintaining the prior
physical property and
mechanical property. The Cr-Mn-N
austenite stainless steel comprises the following composing elements in percentage by weight: 0.005 to 0.08 percent of carbon element, 0.3 to 0.9 percent of
silicon element, 12.1 to 14.8 percent of
manganese element, 0.001 to 0.04 percent of
phosphorus element, 0.001 to 0.03 percent of
sulfur element, 16 to 19 percent of
chromium element, 0.5 to 1.8 percent of
nickel element, 0.2 to 0.45 percent of
nitrogen element, 0.001 to 0.3 percent of
molybdenum element, 0.001 to 0.3 percent of
copper element, and unavoidable trace elements during most manufacturing processes. The
corrosion resistance, the strength and the elongation percentage of the Cr-Mn-N
austenite stainless steel in marine
atmosphere and acid
atmosphere are the same as those of a 304
stainless steel material or are better than those of the 304
stainless steel material, and the Cr-Mn-N austenite stainless steel can reduce the cost for the materials. The Cr-Mn-N austenite stainless steel has the advantages of high elongation percentage, strong
corrosion resistance, excellent
casting formability and good high-temperature
oxidation resistance.