EP 3467130 A4 20191030 - HIGH-TENSILE STEEL PLATE HAVING EXCELLENT LOW-TEMPERATURE TOUGHNESS
Title (en)
HIGH-TENSILE STEEL PLATE HAVING EXCELLENT LOW-TEMPERATURE TOUGHNESS
Title (de)
STAHLPLATTE MIT HOHER BRUCHFESTIGKEIT UND HERVORRAGENDER BESTÄNDIGKEIT GEGEN NIEDRIGE TEMPERATUREN
Title (fr)
PLAQUE D'ACIER À HAUTE RÉSISTANCE MÉCANIQUE PRÉSENTANT UNE EXCELLENTE TÉNACITÉ À BASSE TEMPÉRATURE
Publication
Application
Priority
JP 2016065982 W 20160531
Abstract (en)
[origin: EP3467130A1] A high tensile strength steel plate has a chemical composition including, by mass%: C: 0.08% to 0.15%; Mn: 0.80% to 1.60%; Ni: 3.00% to 4.50%; Cr: 0.50% to 1.00%; Mo: 0.50% to 1.00%; Al: 0.020% to 0.085%; N: 0.0020% to 0.0070%; and B: 0.0005% to 0.0020%, in which a plate thickness t mm is more than 200 mm and not more than 300 mm, in the chemical composition, Ts is 380 to 430, Ceq is 0.80 to 1.05, Ac1 is 580 to 647, and x is 46 to 90, a total amount of martensite and bainite is 99% to 100% by area%, a tensile strength is 780 MPa to 930 MPa, and an absorbed energy of a thickness middle portion obtained by a charpy impact test at -60°C is 69 J or more.
IPC 8 full level
C22C 38/00 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (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 38/54 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR)
C21D 8/02 (2013.01 - KR); C21D 8/0205 (2013.01 - EP); C21D 8/0226 (2013.01 - EP); C21D 8/0263 (2013.01 - EP); C22C 38/001 (2013.01 - EP KR); C22C 38/005 (2013.01 - EP); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP KR); C22C 38/42 (2013.01 - EP); C22C 38/44 (2013.01 - EP KR); C22C 38/46 (2013.01 - EP); C22C 38/48 (2013.01 - EP); C22C 38/50 (2013.01 - EP); C22C 38/54 (2013.01 - EP KR); C22C 38/58 (2013.01 - EP KR); C21D 2211/002 (2013.01 - EP KR); C21D 2211/008 (2013.01 - EP KR)
Citation (search report)
- [XAI] WO 2015140846 A1 20150924 - JFE STEEL CORP [JP] & EP 3120941 A1 20170125 - JFE STEEL CORP [JP]
- [IA] WO 2015162939 A1 20151029 - JFE STEEL CORP [JP] & EP 3135787 A1 20170301 - JFE STEEL CORP [JP]
- [IA] EP 2942414 A1 20151111 - JFE STEEL CORP [JP]
- See references of WO 2017208329A1
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 3467130 A1 20190410; EP 3467130 A4 20191030; EP 3467130 B1 20210407; CN 108603258 A 20180928; CN 108603258 B 20210629; JP 6631702 B2 20200115; JP WO2017208329 A1 20181129; KR 102184966 B1 20201201; KR 20180096782 A 20180829; WO 2017208329 A1 20171207
DOCDB simple family (application)
EP 16903957 A 20160531; CN 201680080661 A 20160531; JP 2016065982 W 20160531; JP 2018520233 A 20160531; KR 20187021618 A 20160531