EP 3214200 A4 20180328 - HIGH STRENGTH STEEL SHEET
Title (en)
HIGH STRENGTH STEEL SHEET
Title (de)
HOCHFESTES STAHLBLECH
Title (fr)
TÔLE D'ACIER À RÉSISTANCE ÉLEVÉE
Publication
Application
Priority
- JP 2014223751 A 20141031
- JP 2015079874 W 20151022
Abstract (en)
[origin: EP3214200A1] Provided is a high strength steel sheet capable of securing high strength before and even after PWHT is performed for a long period, for example, of 15 hours or more. The high strength steel sheet comprises a predetermined component composition, an estimated precipitation amount P 0 is 1.50 or more which is obtained from amounts of Nb, Mo and C, and a metallographic structure satisfies a proportion of ferrite: 60 area% or more; and bainite: 4 area% or more, relative to an entire structure,
IPC 8 full level
C22C 38/00 (2006.01); C21D 1/30 (2006.01); C21D 6/02 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR)
C21D 8/0226 (2013.01 - EP); C21D 9/50 (2013.01 - EP); C22C 38/001 (2013.01 - EP); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP); C22C 38/08 (2013.01 - EP KR); C22C 38/12 (2013.01 - EP KR); C22C 38/14 (2013.01 - EP KR); C22C 38/16 (2013.01 - EP KR); C22C 38/42 (2013.01 - EP KR); C22C 38/44 (2013.01 - EP KR); C22C 38/46 (2013.01 - EP); C22C 38/48 (2013.01 - EP KR); C22C 38/50 (2013.01 - EP); C22C 38/58 (2013.01 - EP KR); C21D 2211/002 (2013.01 - EP KR); C21D 2211/004 (2013.01 - EP); C21D 2211/005 (2013.01 - EP KR)
Citation (search report)
- [A] EP 2749668 A1 20140702 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
- [A] CN 102691007 A 20120926 - BAOSHAN IRON & STEEL
- [A] JP 2001355038 A 20011225 - SUMITOMO METAL IND
- [A] WO 2004031420 A1 20040415 - SUMITOMO METAL IND [JP], et al
- [A] EP 1026275 A1 20000809 - NIPPON STEEL CORP [JP]
- [A] EP 2505682 A1 20121003 - JFE STEEL CORP [JP]
- See references of WO 2016068024A1
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3214200 A1 20170906; EP 3214200 A4 20180328; EP 3214200 B1 20200325; CN 107075641 A 20170818; CN 107075641 B 20200306; JP 2016089211 A 20160523; JP 6276163 B2 20180207; KR 20170063760 A 20170608; WO 2016068024 A1 20160506
DOCDB simple family (application)
EP 15856045 A 20151022; CN 201580058247 A 20151022; JP 2014223751 A 20141031; JP 2015079874 W 20151022; KR 20177010756 A 20151022