Abstract: The tested steel 1 ~2Crl3Mn9Ni4 with different nitrogen content (/% : 0. 08 ~0. 18C, 0. 17 ~0. 34Si, 8. 11 ~9. 27Mn, 0. 008 ~0. 028P, 0. 007 ~0. 032S, 12. 57 ~ 13. 34Cr, 4.05 ~4. 65Ni, 0 ~0. 34N) is melted by a 25 kg vacuum induction furnace adding chromium nitride in atmosphere or argon atmosphere. The test steel is forged and rolled to 0. 8 mm strip then cold-rolled with 0 ~45% deformation. The effect of cold-rolled deformation and nitrogen content on structure, mechanical properties and corrosion resistance of steel has been tested and studied. Results show that the strength and plasticity of steel Crl3Mn9Ni4 are improved by decreasing carbon content and adding suitable nitrogen in steel ； the cold-rolled deformed steel in sensitizing condition has some tendency to grain-boundary corrosion in varying degrees ；the nitrogen is available to increase the stability of phase composition in metastable austenite stainless steel; and the nitrogen contributes to passivating of metastable austenite stainless steel non-bearing stabilizing elements in SO₄²- medium and increases the corrosion resistance of steel in non-sensitized condition, and it obviously increases the pitting corrosion resistance in Cl^- medium.

Key words:  , Nitrogen, Metastable Austenite Stainless Steel 1 ~ 2Crl3Mn9Ni4, Cold-Deformation, Mechanical Properties, Structure, Corrosion Resistance