EP 2256225 A4 20170104 - STAINLESS STEEL FOR USE IN OIL WELL TUBE
Title (en)
STAINLESS STEEL FOR USE IN OIL WELL TUBE
Title (de)
EDELSTAHL ZUR VERWENDUNG IN EINEM ÖLBOHRROHR
Title (fr)
ACIER INOXYDABLE DESTINÉ À ÊTRE UTILISÉ DANS UN TUYAU DE PUITS DE PÉTROLE
Publication
Application
Priority
- JP 2009001238 W 20090319
- JP 2008087643 A 20080328
Abstract (en)
[origin: EP2256225A1] A stainless steel for an oil country tubular good according to the invention includes, in percent by mass, 0.001% to 0.05% C, 0.05% to 1% Si, at most 2% Mn, at most 0.03% P, less than 0.002% S, 16% to 18% Cr, 3.5% to 7% Ni, more than 2% and at most 4% Mo, 1.5% to 4% Cu, 0.001% to 0.3% rare earth metal, 0.001% to 0.1% sol. Al, 0.0001% to 0.01% Ca, at most 0.05% O, and at most 0.05% N, and the balance consists of Fe and impurities. The stainless steel according to the invention includes REM and therefore has high SCC resistance in a high temperature chloride aqueous solution environment.
IPC 8 full level
C22C 38/00 (2006.01); C21D 1/18 (2006.01); C21D 6/00 (2006.01); C21D 9/08 (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)
CPC (source: EP US)
C21D 1/25 (2013.01 - EP US); C21D 6/004 (2013.01 - EP US); C21D 9/14 (2013.01 - EP US); C22C 38/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US)
Citation (search report)
- [I] EP 1683885 A1 20060726 - JFE STEEL CORP [JP]
- [A] EP 1662015 A1 20060531 - JFE STEEL CORP [JP]
- [A] EP 1514950 A1 20050316 - JFE STEEL CORP [JP]
- [A] JP S5993858 A 19840530 - HITACHI METALS LTD
- [AD] JP 2007332442 A 20071227 - JFE STEEL KK
- See references of WO 2009119048A1
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 TR
DOCDB simple family (publication)
EP 2256225 A1 20101201; EP 2256225 A4 20170104; EP 2256225 B1 20180425; AR 070745 A1 20100505; AU 2009230545 A1 20091001; AU 2009230545 B2 20111215; BR PI0909042 A2 20160607; BR PI0909042 B1 20200324; BR PI0909042 B8 20200505; CA 2717104 A1 20091001; CA 2717104 C 20140107; CN 101981215 A 20110223; ES 2674255 T3 20180628; JP 4577457 B2 20101110; JP WO2009119048 A1 20110721; MX 2010010435 A 20101105; RU 2449046 C1 20120427; US 2011014083 A1 20110120; WO 2009119048 A1 20091001
DOCDB simple family (application)
EP 09726339 A 20090319; AR P090101072 A 20090326; AU 2009230545 A 20090319; BR PI0909042 A 20090319; CA 2717104 A 20090319; CN 200980110741 A 20090319; ES 09726339 T 20090319; JP 2009001238 W 20090319; JP 2010505320 A 20090319; MX 2010010435 A 20090319; RU 2010144046 A 20090319; US 89204510 A 20100928