EP 3018231 A4 20170322 - STEEL PLATE HAVING EXCELLENT HYDROGEN-INDUCED-CRACKING RESISTANCE AND TOUGHNESS, AND STEEL TUBE FOR LINE PIPE
Title (en)
STEEL PLATE HAVING EXCELLENT HYDROGEN-INDUCED-CRACKING RESISTANCE AND TOUGHNESS, AND STEEL TUBE FOR LINE PIPE
Title (de)
STAHLPLATTE MIT AUSGEZEICHNETER BESTÄNDIGKEIT GEGENÜBER WASSERSTOFFINDUZIERTER RISSBILDUNG UND ZÄHIGKEIT SOWIE LEITUNGSSTAHLROHR
Title (fr)
TÔLE D'ACIER PRÉSENTANT UNE EXCELLENTE RÉSISTANCE AUX FISSURATIONS INDUITES PAR L'HYDROGÈNE ET UNE EXCELLENTE TÉNACITÉ AINSI QUE TUBE D'ACIER POUR UN TUBE DE CANALISATION
Publication
Application
Priority
- JP 2013138178 A 20130701
- JP 2014066852 W 20140625
Abstract (en)
[origin: EP3018231A1] The present invention provides a steel plate having demonstrably excellent hydrogen-induced cracking resistance and toughness. The steel plate is characterized in including, in percent by mass, 0.02-0.15% of C, 0.02-0.50% of Si, 0.6-2.0% of Mn, more than 0% and up to 0.030% of P, more than 0% and up to 0.003% of S, 0.010-0.08% of Al, 0.0003-0.0060% of Ca, 0.001-0.01% of N, and more than 0% and no more than 0.0045% of O, the balance comprising iron and unavoidable impurities; the mass ratio of Ca to S (Ca/S) being at least 2.0; the amounts of Ca, S, and O satisfying the equation (Ca-1.25 S)/O‰¤1.80; and the Ar gas content of the steel being no greater than 0.5 µL/cm 3 .
IPC 8 full level
C21C 7/00 (2006.01); C21C 7/04 (2006.01); C21C 7/10 (2006.01); C21D 8/02 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR)
C21C 7/04 (2013.01 - EP); C21C 7/10 (2013.01 - EP); C21D 8/0205 (2013.01 - EP); C21D 8/0226 (2013.01 - EP); C21D 8/0263 (2013.01 - EP); C22C 38/001 (2013.01 - KR); C22C 38/02 (2013.01 - KR); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP KR); C22C 38/14 (2013.01 - KR); C22C 38/42 (2013.01 - KR); C22C 38/46 (2013.01 - KR); C22C 38/48 (2013.01 - KR); C22C 38/54 (2013.01 - KR); C22C 38/58 (2013.01 - EP); C21D 8/02 (2013.01 - EP); C21D 2211/004 (2013.01 - EP)
Citation (search report)
- [A] JP H08283826 A 19961029 - SUMITOMO METAL IND
- [A] CN 102732666 A 20121017 - SHOUGANG CORP
- [A] JP H07216500 A 19950815 - SUMITOMO METAL IND
- [A] JP 2914138 B2 19990628
- See references of WO 2015002046A1
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 3018231 A1 20160511; EP 3018231 A4 20170322; CN 105358724 A 20160224; CN 105358724 B 20171124; EP 3428301 A1 20190116; JP 2015010266 A 20150119; JP 6316548 B2 20180425; KR 20160013103 A 20160203; KR 20170065677 A 20170613; WO 2015002046 A1 20150108
DOCDB simple family (application)
EP 14819986 A 20140625; CN 201480037371 A 20140625; EP 18189539 A 20140625; JP 2013138178 A 20130701; JP 2014066852 W 20140625; KR 20157036038 A 20140625; KR 20177015001 A 20140625