EP 2370608 A4 20140521 - HIGH STRENGTH STEEL PLATE FOR NUCLEAR REACTOR CONTAINMENT VESSEL AND METHOD OF MANUFACTURING THE SAME
Title (en)
HIGH STRENGTH STEEL PLATE FOR NUCLEAR REACTOR CONTAINMENT VESSEL AND METHOD OF MANUFACTURING THE SAME
Title (de)
HOCHFESTE STAHLPLATTE FÜR EINEN FLÜSSIGKEITSBEHÄLTER EINES NUKLEARREAKTORS SOWIE VERFAHREN ZU IHRER HERSTELLUNG
Title (fr)
PLAQUE D'ACIER À HAUTE RÉSISTANCE POUR ENCEINTE DE CONFINEMENT DE RÉACTEUR NUCLÉAIRE ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 2009007647 W 20091221
- KR 20080134885 A 20081226
Abstract (en)
[origin: WO2010074473A2] There is provided a high strength steel plate including, by weight: 0.03% to 0.20% C, 0.15% to 0.55% Si, 0.9% to 1.5% Mn, 0.001% to 0.05% Al, 0.030% or less P, 0.030% or less S, 0.30% or less Cr, 0.2% or less Mo, 0.6% or less Ni, 0.07% or less V, 0.04% or less Nb, 5 ppm to 50 ppm Ca, 0.005% to 0.025% Ti, 0.0020% to 0.0060% N, 0.0005% to 0.0020% B, the balance of F and unavoidable impurities. The steel plate may be formed of tempered martensite, and conditions for cooling and recrystallization controlled rolling are optimized so as to control an average grain size of a microstructure and an aspect ratio of structure grains. Accordingly, a superior high- strength steel plate that can be used for an atomic plant, for example, an atomic plant rated at IOOOMW or more by having a tensile strength of at least 650 MPa and an impact toughness of at least 200 J at -5O°C, and a method of manufacturing the same can be provided.
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/00 (2006.01)
CPC (source: EP KR US)
C21D 8/0226 (2013.01 - EP KR US); C21D 8/0263 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP KR US); C22C 38/002 (2013.01 - KR); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/44 (2013.01 - KR); C22C 38/46 (2013.01 - KR); C22C 38/48 (2013.01 - KR); C22C 38/50 (2013.01 - KR); C22C 38/54 (2013.01 - KR); C21D 2211/008 (2013.01 - EP KR US)
Citation (search report)
- [XA] EP 2006407 A1 20081224 - NIPPON STEEL CORP [JP]
- [X] EP 1712651 A1 20061018 - SUMITOMO METAL IND [JP]
- [XA] EP 1889937 A1 20080220 - JFE STEEL CORP [JP]
- [XA] JP 2007177266 A 20070712 - JFE STEEL KK
- [A] US 2007089813 A1 20070426 - TIVELLI MARCO M [MX], et al
- [A] US 5454883 A 19951003 - YOSHIE ATSUHIKO [JP], et al
- [A] US 6364968 B1 20020402 - YASUHARA EIKO [JP], et al
- [A] EP 1764423 A1 20070321 - JFE STEEL CORP [JP]
- [A] EP 1431407 A1 20040623 - NIPPON STEEL CORP [JP]
- [A] JP S5597425 A 19800724 - NIPPON KOKAN KK
- See references of WO 2010074473A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
WO 2010074473 A2 20100701; WO 2010074473 A3 20100923; CN 102264936 A 20111130; CN 102264936 B 20140618; EP 2370608 A2 20111005; EP 2370608 A4 20140521; KR 101091306 B1 20111207; KR 20100076745 A 20100706; US 2011259481 A1 20111027
DOCDB simple family (application)
KR 2009007647 W 20091221; CN 200980152846 A 20091221; EP 09835239 A 20091221; KR 20080134885 A 20081226; US 200913141733 A 20091221