AUSTENITIC STEEL HAVING SUPERIORCHARACTERISTIC IN RESIS TANCE AGAINST STRESS COROSION CRACKING METHOD FOR PRODUCING OF THE SAME AND USAGE OF THE SAME GOOD

• Main Authors: KETA, SHINJU, AONO, YASUHISA, KATO, TAKAHIKO, SATO, HISASHI, YOSHINARI, AKIRA, IZUMIYA, MASAKIYO, KOTAMA, HITEYO, YAMAMOTO, MICHIYOSHI
• Format: Patent
• Language: English; Korean
• Published: 13.06.1995
• Edition: 6
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; ALLOYS; APPARATUS THEREFOR; CHEMISTRY; CRYSTAL GROWTH; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; TREATMENT OF ALLOYS OR NON-FERROUS METALS; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

The present invention relates to an austenitic steel comprising Ni of 9 - 30 %, Cr of 10 - 23 %, and Fe of at least 45 %, which is characterized in comprising enough Cr and Ni to form whole austenitic structure in the equilibrium diagram at 700 DEG C, having austenitic phase at room temperature, and said austenitic phase is a single crystal, and has superior resistance against stress corrosion cracking. The austenitic steel is preferably comprising C </= 0.1 %, Si </= 1 %, Mn </= 2 %, Ni 9 - 15 %, Cr 16 - 18.5 %, and at least one of elements selected from the group of Mo 1 - 3 %, Ti 0.05 - 1 %, and Nb 0.1 - 1.5 %, as of an alloy composition. The alloy relating to the present invention is preferable as a material for members of a reactor core of a nuclear reactor.