Global Patent Index - EP 2893049 B1

EP 2893049 B1 20201007 - FERRITIC STAINLESS STEEL SHEET, METHOD FOR THE PRODUCTION THEREOF, AND USE OF SAME, ESPECIALLY IN EXHAUST LINES

Title (en)

FERRITIC STAINLESS STEEL SHEET, METHOD FOR THE PRODUCTION THEREOF, AND USE OF SAME, ESPECIALLY IN EXHAUST LINES

Title (de)

BLECH AUS FERRITISCHEM EDELSTAHL, VERFAHREN ZUR HERSTELLUNG UND VERWENDUNG, INSBESONDERE IN ABGASLEITUNGEN

Title (fr)

TÔLE D'ACIER INOXYDABLE FERRITIQUE, SON PROCÉDÉ DE FABRICATION, ET SON UTILISATION, NOTAMMENT DANS DES LIGNES D'ÉCHAPPEMENT

Publication

EP 2893049 B1 20201007 (FR)

Application

EP 12766456 A 20120903

Priority

FR 2012051969 W 20120903

Abstract (en)

[origin: WO2014033372A1] The invention relates to a ferritic stainless steel sheet of the following composition expressed in weight percentages: trace <= C <= 0.03%; 0.2% <=Mn <=1%; 0.2 % <= Si <= 1%; trace <= S <= 0.01%; trace <= P <= 0.04%; 15% <= Cr <= 22%; trace <= Ni <= 0.5%; trace <= Mo <= 2%; trace <= Cu <= 0.5%; 0.160% <=Ti <= 1%; 0.02% <= Al <= 1%; 0.2% <= Nb <= 1%; trace <= V <= 0.2%; 0.009% <= N <= 0.03%; trace <= Co <= 0.2%; trace <= Sn <= 0.05%; rare earths (REE) <= 0.1%; trace <= Zr <= 0.01%; the rest of the composition consisting of iron and inevitable impurities resulting from the processing thereof; the Al and rare earth (REE) contents satisfying the relation: Al + 30 x REE >= 0.15%; the Nb, C, N and Ti contents in % satisfying the relation: 1 / [Nb + (7/4) x Ti - 7 x (C + N)] <= 3; said sheet having an entirely recrystallised structure and an average ferritic grain size of between 25 and 65 µm. The invention also relates to a method for the production of such a ferritic stainless steel sheet, and to the use thereof for the production of parts involving shaping and welding, that are to be subjected to a periodic use temperature of between 50° C and 700° C and to a projection of a mixture of water, urea and ammonia.

IPC 8 full level

C22C 38/00 (2006.01); C22C 38/28 (2006.01); C22C 38/50 (2006.01)

CPC (source: EP US)

B22D 7/00 (2013.01 - EP US); C21D 6/002 (2013.01 - EP US); C21D 6/004 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/007 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 8/0236 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US); C21D 8/0273 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/008 (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 38/20 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/24 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/30 (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 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/52 (2013.01 - EP US); F01N 3/2066 (2013.01 - US); C21D 2211/005 (2013.01 - EP US); F01N 2610/02 (2013.01 - US)

Citation (examination)

SAWATANI TADASHI ET AL: "Development of continuous annealing process for 17% chromium stainless steel strip", NEW DEVELOPMENTS IN STAINLESS STEEL TECHNOLOGY : CONFERENCE PROCEEDINGS; DETROIT/MICH., USA : 1984.09.17-21, AMERICAN SOCIETY FOR METALS CORPORATION, US, 1 January 1985 (1985-01-01), pages 269 - 282, XP009195215, ISBN: 978-0-87170-205-0

Citation (opposition)

Opponent : Outokumpu Oyj

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  • WO 2012046879 A1 20120412 - JFE STEEL CORP [JP], et al
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  • EP 1818421 A1 20070815 - UGINE & ALZ FRANCE [FR]
  • JP 2011162843 A 20110825 - NISSHIN STEEL CO LTD
  • US 6733601 B2 20040511 - YAZAWA YOSHIHIRO [JP], et al
  • EP 2460899 A1 20120606 - NISSHIN STEEL CO LTD [JP]
  • ASTM: "ASTM Designation: E 572 - 94. Standard Test Method for X-Ray Emission Spectrometric Analysis of Stainless Steel", 1 September 1994 (1994-09-01), pages 1 - 5, XP055824265
  • STANDARD: "ASTM Standard E1019-11. Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Fusion Techniques", ASTM INTERNATIONAL, WEST CONSHOHOCKEN, PA, 30 June 2011 (2011-06-30), West Conshohocken, PA, XP055615886, Retrieved from the Internet <URL:https://compass.astm.org/download/E1019-11.16120.pdf> [retrieved on 20190827], DOI: 10.1520/E1019-11
  • ASTM: "ASTM Designation E 1086 - 08. Standard Test Method for Atomic Emission Vacuum Spectrometric Analysis of Stainless Steel by Point-to-Plane Excitation Technique", 1 November 2008 (2008-11-01), pages 1 - 5, XP055824268
  • ASTM: "ASTM Designation E353 - 93 (Reapproved 2006) Standard Test Methods for Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys", 1 June 2006 (2006-06-01), pages 1 - 33, XP055824270
  • ROBERTS WILLIAM L: "COLD ROLLING OF STEEL. Excerpts", MARCEL DEKKER, INC., 1 January 1978 (1978-01-01), pages 348 - 372, XP055824274
  • MULLER BRUCE WALTER: "Evaluation of the SAG properties in a dual stabilized ferritic stainless steel", THESIS UNIVERSITY OF CAPE TOWN, 1 September 2002 (2002-09-01), pages 1 - 145, XP055824293
  • DE ABREU, H.F.G. BRUNO, A.D.S. TAVARES, S. SANTOS, R.P. CARVALHO, S.S.: "Effect of high temperature annealing on texture and microstructure on an AISI-444 ferritic stainless steel", MATERIALS CHARACTERIZATION, vol. 57, no. 4-5, 14 November 2006 (2006-11-14), US, pages 342 - 347, XP005763334, ISSN: 1044-5803, DOI: 10.1016/j.matchar.2006.02.015
  • "Metalworking Science and Engineering", 1 January 1991, ISBN: 978-0-07-041904-9, article MIELNIK EDWARD M: "Chapter 5: Classification of Metalworking or Metalforming Processes", pages: cover, 333 - 335, XP055824298
  • ASTM: "ASTM Designation E112 - 10 Standard Test Methods for Determining Average Grain Size", 1 December 2010 (2010-12-01), pages 1 - 26, XP055824305
  • DAVIS J R (ED): "ASM Specialty Handbook. Stainless Steels. Excerpt", 1 December 1994 (1994-12-01), pages i - ii,10, XP055824309
  • RAO G V: "Nickel and Cobalt Ores: Flotation", 1 January 2000 (2000-01-01), pages 3491 - 3500, XP055824313
  • ANONYMUS: "Urea tanks on diesel trucks", EUREKALERT, 30 June 2021 (2021-06-30), pages 1 - 6
  • ANONYMOUS: "NSSC launches second tin containing stainless steel grade, FW2", JAPAN METAL BULLETIN, CSTEELNEWS.COM, 16 December 2010 (2010-12-16), pages 1 - 1, XP055824332, [retrieved on 20210714]
  • KAGA YUJI: "Sn-added Ferritic Stainless Steel. NSSC FW series characteristics", 6TH ANNUAL ASIAN STEEL CONFERENCE. 7TH JUNE 2011. NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION, 1 January 2011 (2011-01-01), pages 1 - 27, XP055824324
  • ANONYMOUS: "Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes", DANSK STANDARD EN 10088-2, 8 December 2005 (2005-12-08), XP093155616

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)

WO 2014033372 A1 20140306; BR 112015004633 A2 20170704; CA 2883538 A1 20140306; CA 2883538 C 20191126; CN 104903482 A 20150909; CN 104903482 B 20170308; EP 2893049 A1 20150715; EP 2893049 B1 20201007; ES 2831163 T3 20210607; HU E052513 T2 20210528; IN 1710DEN2015 A 20150522; JP 2015532681 A 20151112; KR 20150099706 A 20150901; MX 2015002716 A 20150814; RU 2015107432 A 20160927; RU 2603519 C2 20161127; SI 2893049 T1 20210331; US 2016115562 A1 20160428; US 9873924 B2 20180123

DOCDB simple family (application)

FR 2012051969 W 20120903; BR 112015004633 A 20120903; CA 2883538 A 20120903; CN 201280076210 A 20120903; EP 12766456 A 20120903; ES 12766456 T 20120903; HU E12766456 A 20120903; IN 1710DEN2015 A 20150302; JP 2015529088 A 20120903; KR 20157006981 A 20120903; MX 2015002716 A 20120903; RU 2015107432 A 20120903; SI 201231867 T 20120903; US 201214425313 A 20120903