Lee, Ki-Hyoung, E-mail: [Department of Materials Science and Engineering, KAIST, Daejeon 305-701 (Korea, Republic of) Kim, Min-Chul Lee, Bong-Sang [Nuclear Materials Research Division, KAERI, Daejeon 305-353 (Korea, Republic of) Wee, Dang-Moon [Department of Materials Science and Engineering, KAIST, Daejeon 305-701 (Korea, Republic of) Master curve characterization of the fracture toughness behavior in SA 508 Gr. SA 508 Gr.3 Cl.2 steel also has quite good strength, but there is a loss of toughness. 4N model alloy shows the best strength and transition behavior among the three SA 508 steels. 4N model alloy is tempered martensite, while SA 508 Gr.3 Cl.1 and Cl.2 steels show a typical tempered upper bainitic structure.
The predominant microstructure of SA 508 Gr. The microstructure and mechanical properties of SA 508 Gr.3 Cl.1, Cl2 and Gr. Tensile tests and Charpy impact tests were also performed to evaluate the mechanical properties, and a microstructural investigation was carried out. To evaluate the fracture toughness in the transition region, the master curve method according to ASTM E1921 was adopted in the cleavage transition region. 4N low alloy steels are characterized to compare their properties. In this study, microstructure and mechanical properties of SA 508 Gr.3 Cl. Kim, Min-Chul Park, Sang-Gyu Lee, Bong-Sang [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of) Lee, Ki-Hyoung [Korea Institute of Nuclear Safety, Daejeon (Korea, Republic of) 4N Low Alloy Steels for Pressure VesselsĮnergy Technology Data Exchange (ETDEWEB) Comparison on Mechanical Properties of SA 508 Gr.3 Cl.1, Cl.2, and Gr.
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