EP 3276028 A4 20180808 - FERRITE-AUSTENITE STAINLESS STEEL SHEET WITH EXCELLENT SHEARED END FACE CORROSION RESISTANCE
Title (en)
FERRITE-AUSTENITE STAINLESS STEEL SHEET WITH EXCELLENT SHEARED END FACE CORROSION RESISTANCE
Title (de)
FERRIT-AUSTENIT-EDELSTAHLBLECH MIT HERVORRAGENDER GESCHERTER STIRNSEITENKORROSIONSBESTÄNDIGKEIT
Title (fr)
TÔLE D'ACIER INOXYDABLE FERRITIQUE-AUSTÉNITIQUE PRÉSENTANT UNE EXCELLENTE RÉSISTANCE À LA CORROSION DES FACES D'EXTRÉMITÉ CISAILLÉES
Publication
Application
Priority
- JP 2015065028 A 20150326
- JP 2016057967 W 20160314
Abstract (en)
[origin: EP3276028A1] The present invention relates to a ferritic-austenitic stainless steel sheet that is used in an atmospheric environment without performing a corrosion resistance treatment, and provides a ferritic-austenitic stainless steel sheet in which the corrosion resistance of the sheared line is improved. The ferritic-austenitic stainless steel sheet of the present invention includes, in terms of % by mass: C: 0.03% or less; Si: 0.1% to 1.0%; Mn: 0.5% to 5.0%; P: 0.04% or less; Al: 0.015% to 0.10%; Cr: 19.0% to 24.0%; Ni: 0.60% to 2.30%; Cu: 0.5% to 1.5%; Co: 0.05% to 0.25%; V: 0.01% to 0.15%; Ca: 0.002% or less; N: 0.06% to 0.20%; and S: 0.0002% to 0.0040%, with the remainder being Fe and unavoidable impurities, wherein a value of Co + 0.25V is 0.10 or more and less than 0.25, a metallic structure consists of ferrite phases and austenite phases, an average crystal grain size of the ferrite phases is 5 to 20 µm, and an average crystal grain size of the austenite phases is 2 to 10 µm, and sulfides having major axes of 1 to 5 µm exist at an amount of 5 to 20 pieces per 5 mm 2 .
IPC 8 full level
C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/10 (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); C22C 38/52 (2006.01); C22C 38/58 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP KR)
C22C 38/00 (2013.01 - EP); C22C 38/002 (2013.01 - KR); C22C 38/004 (2013.01 - KR); C22C 38/02 (2013.01 - EP KR); C22C 38/04 (2013.01 - EP); C22C 38/10 (2013.01 - EP); C22C 38/105 (2013.01 - EP); C22C 38/42 (2013.01 - EP KR); C22C 38/44 (2013.01 - EP); C22C 38/46 (2013.01 - EP KR); C22C 38/48 (2013.01 - EP); C22C 38/50 (2013.01 - EP); C22C 38/52 (2013.01 - EP KR); C22C 38/58 (2013.01 - EP KR); C22C 38/60 (2013.01 - EP KR); C21D 9/46 (2013.01 - EP); C21D 2211/001 (2013.01 - EP KR); C21D 2211/005 (2013.01 - EP KR)
Citation (search report)
- [I] JP 2011168838 A 20110901 - NIPPON STEEL & SUMIKIN SST
- [I] EP 2770076 A1 20140827 - NIPPON STEEL & SUMIKIN SST [JP]
- [I] EP 2684973 A1 20140115 - NIPPON STEEL & SUMIKIN SST [JP]
- See references of WO 2016152622A1
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
DOCDB simple family (publication)
EP 3276028 A1 20180131; EP 3276028 A4 20180808; EP 3276028 B1 20200115; CN 107429341 A 20171201; CN 107429341 B 20190611; ES 2773868 T3 20200715; JP 6379282 B2 20180822; JP WO2016152622 A1 20171207; KR 101973309 B1 20190426; KR 20170115092 A 20171016; TW 201641718 A 20161201; TW I654320 B 20190321; WO 2016152622 A1 20160929
DOCDB simple family (application)
EP 16768525 A 20160314; CN 201680015155 A 20160314; ES 16768525 T 20160314; JP 2016057967 W 20160314; JP 2017508242 A 20160314; KR 20177025150 A 20160314; TW 105108114 A 20160316