Experimental Study on Stress Corrosion Cracking of 316LN

5%,10% and 20% deformation are achieved to the 316LN matrix material respectively by rolling,then they are annealed at 1050℃ for 30 minutes.The specimens are made by the materials of different deformation in the two treatment conditions.After that,the SCC（stress corrosion cracking） experiment is carried out in boiling saturated magnesium chloride solution by the constant load tensile technology.Comparing with the SCC behaviors and crack growth rates of the specimens,the crack growth rate of 316LN is sensitive to the deformation.The bigger deformation changes,the poorer resistance to the SCC behavior and the faster crack growth rate.The treatment of rolling plus annealing leads better resistance to SCC behaviors than the treatment of rolling alone,indicating that the annealing can indeed improve the SCC resistance of 316LN.