The Establishment and Application of 316LN Stainless Steel Database for AP1000 Primary Coolant Pipes

Nuclear grade 316LN austenitic stainless steel (ASS) with an exceptional combination of mechanical properties and corrosion resistance was used to produce AP1000 primary coolant pipe. In order to evaluate the microstructure evolution of the pipe during its forging process, the material database of the 316LN ASS is established with high integrity and reliability. In this paper, the thermal physical parameters, flow stress-strain data and the recrystallization kinetic equations of the 316LN steel are coupled, and the material database is systematically established. Most important, the reliability of the database is verified by an experiment.