EP 2410068 A4 20170503 - DUPLEX STAINLESS STEEL PLATE HAVING EXCELLENT PRESS MOLDABILITY
Title (en)
DUPLEX STAINLESS STEEL PLATE HAVING EXCELLENT PRESS MOLDABILITY
Title (de)
DUPLEX-EDELSTAHLPLATTE MIT HERVORRAGENDER DRUCKFORMBARKEIT
Title (fr)
TÔLE D'ACIER INOXYDABLE DUPLEX AYANT UNE EXCELLENTE APTITUDE AU MOULAGE À LA PRESSE
Publication
Application
Priority
- JP 2010055147 W 20100317
- JP 2009067767 A 20090319
Abstract (en)
[origin: EP2410068A1] The present invention provides a duplex stainless steel sheet with excellent press-formability which defines the ingredients of the steel, Ni balance, and austenite phase rate to obtain a 0.2% proof stress and Erichsen value equal to that of SUS304 or another austenitic stainless steel, that is, a duplex stainless steel sheet which contains, by mass%, C: 0.05% or less, Si: 0.5 to 3%, Mn: 1 to 5%, Cr: 16 to 21%, Ni: 1 to 6%, Cu: 0.5 to 3%, and N: 0.07% or less, has an Ni-bai. value given by the following formula <1> of -7.5 to -3.5, has a balance of Fe and unavoidable impurities, has an austenite phase rate of 50% to 95%, and has a balance of ferrite phases: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒNi-bal.=30(C+N)+Ni+0.5Mn+0.3Cu-1.1(Cr+1.5Si)+8.2€ƒ€ƒ€ƒ€ƒ€ƒ<1>
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 38/34 (2006.01); C22C 38/42 (2006.01); C22C 38/58 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP KR US)
C21D 6/004 (2013.01 - EP KR US); C21D 8/0236 (2013.01 - EP KR US); C21D 9/46 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP KR US); C22C 38/008 (2013.01 - KR); C22C 38/34 (2013.01 - EP KR US); C22C 38/42 (2013.01 - EP KR US); C22C 38/58 (2013.01 - EP KR US); C22C 38/60 (2013.01 - KR); C21D 2211/001 (2013.01 - EP KR US); C21D 2211/005 (2013.01 - EP KR US); Y10T 428/12229 (2015.01 - EP US)
Citation (search report)
- [I] US 2007163679 A1 20070719 - FUJISAWA MITSUYUKI [JP], et al
- [A] WO 2009017258 A1 20090205 - NIPPON STEEL & SUMIKIN SST [JP], et al & US 2013118650 A1 20130516 - HATANO MASAHARU [JP], et al
- [A] US 4798635 A 19890117 - BERNHARDSSON SVEN-OLOV [SE], et al
- [AP] WO 2009048137 A1 20090416 - NIPPON STEEL & SUMIKIN SST [JP], et al
- See references of WO 2010107132A1
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 2410068 A1 20120125; EP 2410068 A4 20170503; EP 2410068 B1 20190220; CN 102356173 A 20120215; CN 102356173 B 20131113; ES 2720184 T3 20190718; JP 2010222593 A 20101007; JP 5335503 B2 20131106; KR 101538750 B1 20150727; KR 20110123772 A 20111115; KR 20140102326 A 20140821; US 2012009433 A1 20120112; WO 2010107132 A1 20100923
DOCDB simple family (application)
EP 10753622 A 20100317; CN 201080012544 A 20100317; ES 10753622 T 20100317; JP 2009067767 A 20090319; JP 2010055147 W 20100317; KR 20117021742 A 20100317; KR 20147021833 A 20100317; US 201013256977 A 20100317