High Cr ferritic/martensitic steels having an improved creep resistance for in-core component materials in nuclear reactor, and preparation method thereof

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United States of America Patent

PATENT NO 9598750
APP PUB NO 20120106693A1
SERIAL NO

13280585

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Abstract

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Disclosed herein is a high Cr Ferritic/Martensitic steel comprising 0.04 to 0.13% by weight of carbon, 0.03 to 0.07% by weight of silicon, 0.40 to 0.50% by weight of manganese, 0.40 to 0.50% by weight of nickel, 8.5 to 9.5% by weight of chromium, 0.45 to 0.55% by weight of molybdenum, 0.10 to 0.25% by weight of vanadium, 0.02 to 0.10% by weight of tantalum, 0.21 to 0.25% by weight of niobium, 1.5 to 3.0% by weight of tungsten, 0.015 to 0.025% by weight of nitrogen, 0.01 to 0.02% by weight of boron and iron balance. By regulating the contents of alloying elements such as nitrogen, born, the high Cr Ferritic/Martensitic steel with superior tensile strength and creep resistance is provided, and can be effectively used as an in-core component material for sodium-cooled fast reactor (SFR).

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Patent Owner(s)

Patent OwnerAddress
KOREA ATOMIC ENERGY RESEARCH INSTITUTEDAEJEON 34057
KOREA HYDRO AND NUCLEAR POWER CO LTD1655 BULGUK-RO MUNMUDAEWANG-MYEON GYEONGSANGBUK-DO GYEONGJU-SI 38120

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Baek, Jong Hyuk Daejeon, KR 13 88
Hahn, Dohee Daejeon, KR 4 23
Han, Chang Hee Daejeon, KR 14 19
Kim, Jun Hwan Daejeon, KR 23 40
Kim, Sung Ho Daejeon, KR 253 1085
Kim, Tae Kyu Daejeon, KR 29 49
Kim, Woo Gon Daejeon, KR 2 3
Kim, Yeong-Il Daejeon, KR 3 1
Lee, Chan Bock Daejeon, KR 8 12

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