EP 3670692 A1 20200624 - FERRITIC STAINLESS STEEL
Title (en)
FERRITIC STAINLESS STEEL
Title (de)
FERRITISCHER EDELSTAHL
Title (fr)
ACIER INOXYDABLE FERRITIQUE
Publication
Application
Priority
EP 18215480 A 20181221
Abstract (en)
The invention relates to a Ferritic stainless steel having excellent corrosion and sheet forming properties. The steel consists of in weight percentages 0.003 - 0.035 % carbon, 0.05 - 1.0 % silicon, 0.10 - 0.8 % manganese, 18 - 24 % chromium, 0.05 - 0.8 % nickel, 0.003 - 2.5 % molybdenum, 0.2 - 0.8 % copper, 0.003 - 0.05 % nitrogen, 0,05 - 1.0 % titanium, 0.05 - 1.0 % niobium, 0.03 - 0.5 % vanadium, 0.010 - 0.04 % aluminium, and the sum C+N less than 0.06 %, the remainder being iron and inevitable impurities, wherein the ratio(Ti+Nb)/(C+N) is higher or equal to 8, and less than 40,and the ratioTieq/Ceq = (Ti + 0.515*Nb +0.940*V)/(C+0.858*N) is higher or equal to 6, and less than 40, andLeq = 5.8*Nb + 5*Ti*Si is higher or equal to 3.3, and the steel is produced using AOD (Argon-Oxygen-Decarburization) technology.
IPC 8 full level
C22C 38/00 (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 KR US)
C21D 8/0205 (2013.01 - US); C22C 38/001 (2013.01 - EP KR US); C22C 38/02 (2013.01 - US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/42 (2013.01 - EP KR US); C22C 38/44 (2013.01 - EP KR US); C22C 38/46 (2013.01 - EP KR US); C22C 38/48 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP KR US); C22C 38/58 (2013.01 - KR); C21D 2211/004 (2013.01 - EP); C21D 2211/005 (2013.01 - EP KR US)
Citation (applicant)
- EP 2922978 A1 20150930 - OUTOKUMPU OY [FI]
- EP 1818422 A1 20070815 - UGINE & ALZ FRANCE [FR]
- EP 2163658 A1 20100317 - JFE STEEL CORP [JP]
- WO 2012046879 A1 20120412 - JFE STEEL CORP [JP], et al
- EP 1083241 A1 20010314 - UGINE SA [FR]
- EP 1170392 A1 20020109 - KAWASAKI STEEL CO [JP]
- US 4726853 A 19880223 - GRESSIN PASCAL [FR], et al
- EP 0478790 A1 19920408 - NISSHIN STEEL CO LTD [JP]
- EP 2557189 A1 20130213 - NIPPON STEEL & SUMIKIN SST [JP]
- W. GORDON; A. VAN BENNEKOM: "Review of stabilisation of ferritic stainless steels", MATERIALS SCIENCE AND TECHNOLOGY, vol. 12, no. 2, 1996, pages 126 - 131
Citation (search report)
- [XI] CN 103194689 B 20170804
- [XDI] EP 2922978 A1 20150930 - OUTOKUMPU OY [FI]
- [X] EP 2826878 A1 20150121 - JFE STEEL CORP [JP]
- [XI] JP 2013133482 A 20130708 - JFE STEEL CORP
- [XI] WO 2017170067 A1 20171005 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3670692 A1 20200624; EP 3670692 B1 20220810; AU 2019406425 A1 20210617; BR 112021011181 A2 20210824; CA 3122043 A1 20200625; CN 113195762 A 20210730; ES 2927078 T3 20221102; JP 2022514575 A 20220214; JP 7464606 B2 20240409; KR 20210107657 A 20210901; MX 2021006953 A 20210908; SI 3670692 T1 20221130; TW 202035732 A 20201001; US 2022056565 A1 20220224; WO 2020127275 A1 20200625; ZA 202103639 B 20231129
DOCDB simple family (application)
EP 18215480 A 20181221; AU 2019406425 A 20191217; BR 112021011181 A 20191217; CA 3122043 A 20191217; CN 201980083092 A 20191217; EP 2019085663 W 20191217; ES 18215480 T 20181221; JP 2021535108 A 20191217; KR 20217018178 A 20191217; MX 2021006953 A 20191217; SI 201830780 T 20181221; TW 108146912 A 20191220; US 201917309717 A 20191217; ZA 202103639 A 20210527