Global Patent Index - EP 1818422 B2

EP 1818422 B2 20120718 - Ferritic stainless steel with 19% of chromium stabilised with niobium

Title (en)

Ferritic stainless steel with 19% of chromium stabilised with niobium

Title (de)

Ferritischer Edelstahl mit 19 % Chrom, der mit Niob stabilisiert ist

Title (fr)

Acier inoxydable ferritique dit a 19% de chrome stabilisé au niobium

Publication

EP 1818422 B2 20120718 (FR)

Application

EP 07290039 A 20070111

Priority

  • EP 06290231 A 20060208
  • EP 07290039 A 20070111

Abstract (en)

[origin: EP1818421A1] The stainless steel contains the following elements in wt/%: carbon up to 0.03; manganese up to 1; silicon 0.3 - 1; sulfur up to 0.01; phosphorous up to 0.04; chrome 18 - 22; nickel 0.5; molybdenum up to 2.5; copper up to 0.5; titanium up to 0.02; zirconium up to 0.02; aluminum up to 0.02; niobium 0.2 - 1; vanadium up to 0.2; nitrogen up to 0.03; cobalt 0,005 - 0.05; tin up to 0.05; the rest being made up of iron and unavoidable impurities. The steel is poured as a semi-finished product, heated to over 1000 degrees C, hot and cold rolled and reheated to a temperature and for a duration that produce a completely recrystallised structure having a ferritic grain size of between 10 and 60 micrometres.

IPC 8 full level

C22C 38/26 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/28 (2006.01); C22C 38/30 (2006.01)

CPC (source: EP)

C21D 6/002 (2013.01); C21D 8/0273 (2013.01); C21D 9/0068 (2013.01); C22C 38/001 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/30 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/52 (2013.01); C21D 2211/004 (2013.01); C21D 2211/005 (2013.01); F01N 13/10 (2013.01); F01N 13/16 (2013.01); F01N 2530/04 (2013.01)

Citation (opposition)

Opponent :

  • JP H04280948 A 19921006 - NIPPON YAKIN KOGYO CO LTD
  • JP H04224657 A 19920813 - KAWASAKI STEEL CO
  • J.H. Schmitt et al: "Some Recent Trends in Niobium Ferritic Stainless Steels", Proceedings of Symposium at the occasion of the 30 years anniversary of Niobium Products Co. GmbH, Düsseldorf, 20-05-2005.

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

DOCDB simple family (publication)

EP 1818421 A1 20070815; AT E417134 T1 20081215; DE 602007000326 D1 20090122; DK 1818422 T3 20090223; DK 1818422 T4 20121029; EP 1818422 A1 20070815; EP 1818422 B1 20081210; EP 1818422 B2 20120718; ES 2317629 T3 20090416; ES 2317629 T5 20121226; PT 1818422 E 20090130; SI 1818422 T1 20090430; SI 1818422 T2 20121130

DOCDB simple family (application)

EP 06290231 A 20060208; AT 07290039 T 20070111; DE 602007000326 T 20070111; DK 07290039 T 20070111; EP 07290039 A 20070111; ES 07290039 T 20070111; PT 07290039 T 20070111; SI 200730015 T 20070111