EP 2623625 A4 20170927 - STEEL PLATE FOR LINE PIPE, HAVING EXCELLENT HYDROGEN INDUCED CRACK RESISTANCE, AND PREPARATION METHOD THEREOF
Title (en)
STEEL PLATE FOR LINE PIPE, HAVING EXCELLENT HYDROGEN INDUCED CRACK RESISTANCE, AND PREPARATION METHOD THEREOF
Title (de)
STAHLPLATTE FÜR EINE ROHRLEITUNG MIT HERVORRAGENDER BESTÄNDIGKEIT GEGEN DURCH WASSERSTOFF HERBEIGEFÜHRTE RISSE UND VERFAHREN ZU IHRER HERSTELLUNG
Title (fr)
TÔLE D'ACIER POUR TUBE DE CANALISATION, PRÉSENTANT UNE EXCELLENTE RÉSISTANCE À LA FISSURATION SOUS HYDROGÈNE, ET SON PROCÉDÉ DE PRÉPARATION
Publication
Application
Priority
- KR 20110086685 A 20110829
- KR 20100094599 A 20100929
- KR 2011006373 W 20110829
Abstract (en)
[origin: EP2623625A2] Disclosed are a steel plate for a line pipe having excellent hydrogen induced crack resistance with a tensile strength of 450 MPa or more, and a preparation method thereof. According to the present invention, the steel plate for a line pipe, having excellent hydrogen induced crack resistance comprises: 0.03ˆ¼0.05 wt% of carbon (C); 0.2-0.3 wt% of silicon (Si); 0.5-1.3 wt% of manganese (Mn); 0.010 wt% or less of phosphorus (P); 0.005 wt% or less of sulfur (S); 0.02-0.05 wt% of aluminum (Al); 0.2-0.5 wt% of nickel (Ni); 0.2-0.3 wt% of chromium (Cr); 0.03-0.05 wt% of niobium (Nb); 0.02-0.05 wt% of vanadium (V); 0.01-0.02 wt% of titanium (Ti); 0.001-0.004 wt% of calcium (Ca); and a balance of iron (Fe) and inevitable impurities, and has a tensile strength of 450 MPa or more.
IPC 8 full level
C21D 8/02 (2006.01); C21D 8/10 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/28 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01)
CPC (source: EP KR US)
C21D 8/0205 (2013.01 - EP KR US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0263 (2013.01 - KR); C21D 8/10 (2013.01 - EP US); C21D 8/105 (2013.01 - EP US); C22C 38/002 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/46 (2013.01 - EP KR US); C22C 38/48 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP KR US); C21D 2211/002 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US)
Citation (search report)
- [I] JP H05195057 A 19930803 - KAWASAKI STEEL CO
- [A] EP 1867742 A1 20071219 - NIPPON STEEL CORP [JP]
- [A] JP H11279639 A 19991012 - NIPPON KOKAN KK
- [A] KR 20070098678 A 20071005 - KOBE STEEL LTD [JP]
- See references of WO 2012043984A2
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 2623625 A2 20130807; EP 2623625 A4 20170927; EP 2623625 B1 20181024; KR 101344638 B1 20140116; KR 20120033235 A 20120406; US 2013224063 A1 20130829; WO 2012043984 A2 20120405; WO 2012043984 A3 20120524
DOCDB simple family (application)
EP 11829490 A 20110829; KR 2011006373 W 20110829; KR 20110086685 A 20110829; US 201313853584 A 20130329