EP 2407570 A1 20120118 - HIC-RESISTANT THICK STEEL SHEET AND UOE STEEL PIPE
Title (en)
HIC-RESISTANT THICK STEEL SHEET AND UOE STEEL PIPE
Title (de)
HIC-BESTÄNDIGES DICKES STAHLBLECH UND UOE-STAHLROHR
Title (fr)
FEUILLE D'ACIER ÉPAIS RÉSISTANT DE HIC ET TUYAU EN ACIER FABRIQUÉ SELON LE PROCÉDÉ UOE
Publication
Application
Priority
- JP 2010054173 W 20100312
- JP 2009059639 A 20090312
Abstract (en)
A thick steel plate and a UOE steel pipe having a high strength of at least X60 grade and improved resistance to HIC have a chemical composition consisting essentially of, in mass percent, C: 0.02 - 0.07%, Si: 0.05 - 0.50%, Mn: 1.1 - 1.6%, P: at most 0.015%, S: at most 0.002%, Nb: 0.005 - 0.060%, Ti: 0.005 - 0.030%, Al: 0.005 - 0.06%, Ca: 0.0005 - 0.0060%, N: 0.0015 - 0.007%, at least one of Cu, Ni, Cr, and Mo in a total amount of greater than 0.1% and less than 1.5%, and a remainder of Fe and impurities, wherein the degrees of segregation of Nb and Ti are both at most 2.0, and the ratio of (the degree of Nb segregation) / (the degree of Mn segregation) and the ratio of (the degree of Ti segregation) / (the degree of Mn segregation) are both at least 1.0 and at most 1.5.
IPC 8 full level
B21B 1/38 (2006.01); B21B 3/00 (2006.01); B21C 37/08 (2006.01); C21D 1/06 (2006.01); C21D 8/02 (2006.01); C21D 9/08 (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 38/58 (2006.01)
CPC (source: EP KR US)
B21C 37/08 (2013.01 - EP KR US); C21D 1/06 (2013.01 - EP KR US); C21D 8/0247 (2013.01 - EP KR US); C21D 9/08 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP KR 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 KR US); C22C 38/14 (2013.01 - EP KR US)
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)
EP 2407570 A1 20120118; EP 2407570 A4 20160622; CA 2755271 A1 20100916; CN 102421926 A 20120418; JP WO2010104165 A1 20120913; KR 20110123807 A 20111115; RU 2011141268 A 20130420; US 2012121453 A1 20120517; WO 2010104165 A1 20100916
DOCDB simple family (application)
EP 10750916 A 20100312; CA 2755271 A 20100312; CN 201080020905 A 20100312; JP 2010054173 W 20100312; JP 2011503869 A 20100312; KR 20117023642 A 20100312; RU 2011141268 A 20100312; US 201113228819 A 20110909