Global Patent Index - EP 2172574 A1

EP 2172574 A1 20100407 - FERRITIC-AUSTENITIC STAINLESS STEEL EXCELLENT IN CORROSION RESISTANCE AND WORKABILITY AND PROCESS FOR MANUFACTURING THE SAME

Title (en)

FERRITIC-AUSTENITIC STAINLESS STEEL EXCELLENT IN CORROSION RESISTANCE AND WORKABILITY AND PROCESS FOR MANUFACTURING THE SAME

Title (de)

FERRITISCH-AUSTENITISCHER EDELSTAHL MIT HERVORRAGENDER KORROSIONSBESTÄNDIGKEIT UND BEARBEITBARKEIT SOWIE HERSTELLUNGSVERFAHREN DAFÜR

Title (fr)

ACIER INOXYDABLE AUSTÉNOFERRITIQUE D'EXCELLENTE RÉSISTANCE À LA CORROSION ET TRANSFORMABILITÉ, ET PROCÉDÉ POUR LA FABRICATION DUDIT

Publication

EP 2172574 A1 (EN)

Application

EP 08792317 A

Priority

  • JP 2008064260 W
  • JP 2007202016 A
  • JP 2007222259 A

Abstract (en)

The present invention relates to ferritic-austenitic stainless steel oriented to have low Ni which is excellent in corrosion resistance, particularly in corrosion resistance in a neutral chloride environment, and has high "uniform elongation" - a factor governing workability - and a method of production for the same. There are independently provided ferritic-austenitic stainless steels and methods of production for the same particularly having a corrosion resistance in a neutral chloride environment satisfying PI value(=Cr+3Mo+10N-Mn)‰¥18% and having a uniform elongation satisfying -10‰¤Md‰¤110 (where Md=-551-462({C}+[N])-9.2[Si]-8.1[Mn]-13.7[Cr]-29[Ni]-29[Cu]-18.5[Mo], where [ ] is composition (mass%) in the austenite phase, and { } is average composition (mass%))

IPC 8 full level

C22C 38/00 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/18 (2006.01); C22C 38/38 (2006.01); C22C 38/42 (2006.01); C22C 38/58 (2006.01)

CPC (source: EP KR)

C21D 6/004 (2013.01 - EP KR); C21D 6/005 (2013.01 - EP KR); C21D 8/0226 (2013.01 - EP KR); C21D 8/0236 (2013.01 - EP KR); C21D 8/0263 (2013.01 - EP KR); C22C 38/001 (2013.01 - EP KR); C22C 38/002 (2013.01 - KR); C22C 38/004 (2013.01 - KR); C22C 38/18 (2013.01 - EP KR); C22C 38/34 (2013.01 - KR); C22C 38/38 (2013.01 - KR); C22C 38/42 (2013.01 - EP KR); C22C 38/58 (2013.01 - EP KR); C21D 2211/001 (2013.01 - EP KR); C21D 2211/005 (2013.01 - EP KR)

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 MT NL NO PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA MK RS

DOCDB simple family (publication)

EP 2172574 A1 20100407; EP 2172574 A4 20170607; EP 2172574 B1 20190123; CN 101765671 A 20100630; CN 101765671 B 20120111; EP 3434802 A1 20190130; EP 3434802 B1 20200701; ES 2717840 T3 20190625; KR 101185978 B1 20120926; KR 101253326 B1 20130411; KR 20100011989 A 20100203; KR 20120011098 A 20120206; US 2010126644 A1 20100527; US 2013118650 A1 20130516; WO 2009017258 A1 20090205

DOCDB simple family (application)

EP 08792317 A 20080801; CN 200880100675 A 20080801; EP 18188353 A 20080801; ES 08792317 T 20080801; JP 2008064260 W 20080801; KR 20097026935 A 20080801; KR 20127001606 A 20080801; US 201213621473 A 20120917; US 45291808 A 20080801