Global Patent Index - EP 1584699 A4

EP 1584699 A4 20090603 - HIGH-STRENGTH MARTENSITIC STAINLESS STEEL WITH EXCELLENT RESISTANCES TO CARBON DIOXIDE GAS CORROSION AND SULFIDE STRESS CORROSION CRACKING

Title (en)

HIGH-STRENGTH MARTENSITIC STAINLESS STEEL WITH EXCELLENT RESISTANCES TO CARBON DIOXIDE GAS CORROSION AND SULFIDE STRESS CORROSION CRACKING

Title (de)

HOCHFESTER MARTENSITISCHER EDELSTAHL MIT HERVORRAGENDER BESTÄNDIGKEIT GEGEN KOHLENSÄUREKORROSION UND SULFID-SPANNUNGSRISSKORROSION

Title (fr)

ACIER INOXYDABLE MARTENSITIQUE A HAUTE RESISTANCE PRESENTANT UNE EXCELLENTE RESISTANCE A LA CORROSION DU GAZ CARBONIQUE ET A LA FISSURATION PAR CORROSION SOUS CONTRAINTE DUE AU SULFURE

Publication

EP 1584699 A4 20090603 (EN)

Application

EP 03780915 A 20031218

Priority

  • JP 0316288 W 20031218
  • JP 2002369595 A 20021220

Abstract (en)

[origin: EP1584699A1] The present invention provides a martensitic stainless steel in which specified elements in a steel composition are limited. The martensitic stainless steel can have high strength of 0.2 % proof stress of 860 MPa or more and excellent carbon dioxide gas corrosion resistance and sulfide stress-corrosion cracking resistance by limiting the steel composition of specified elements and defining Mo content in the steel by relationships with IM values as well as by forming microstructure of the steel with main tempered martensite, carbide precipitated during tempering, and intermetallic compounds such as a Laves phase, a sigma phase and the like. As a result the martensitic stainless steels of the present invention can be applied to practical steels, which can be widely used in oil well tubes and the like under environment including carbon dioxide gas, hydrogen sulfide, chlorine ions or two or more of them, in wide fields. <IMAGE>

IPC 8 full level

C21D 1/18 (2006.01); C21D 6/00 (2006.01); C22C 38/00 (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 38/50 (2006.01); C22C 38/58 (2006.01)

CPC (source: EP US)

C21D 1/25 (2013.01 - EP US); C21D 6/004 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/004 (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 38/50 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

DOCDB simple family (publication)

EP 1584699 A1 20051012; EP 1584699 A4 20090603; AR 042494 A1 20050622; AU 2003289437 A1 20040714; AU 2003289437 B2 20070920; BR 0317550 A 20051122; BR PI0317550 B1 20160614; CA 2509581 A1 20040708; CA 2509581 C 20100406; CN 100368579 C 20080213; CN 1729306 A 20060201; JP 4428237 B2 20100310; JP WO2004057050 A1 20060420; MX PA05006562 A 20050816; NO 20052986 D0 20050617; NO 20052986 L 20050915; NO 337858 B1 20160704; RU 2005122929 A 20060210; RU 2307876 C2 20071010; US 2005224143 A1 20051013; WO 2004057050 A1 20040708

DOCDB simple family (application)

EP 03780915 A 20031218; AR P030104662 A 20031216; AU 2003289437 A 20031218; BR 0317550 A 20031218; CA 2509581 A 20031218; CN 200380106684 A 20031218; JP 0316288 W 20031218; JP 2004562054 A 20031218; MX PA05006562 A 20031218; NO 20052986 A 20050617; RU 2005122929 A 20031218; US 14932005 A 20050610