Global Patent Index - EP 1389639 A3

EP 1389639 A3 20050608 - Steel sheet with excellent bendability

Title (en)

Steel sheet with excellent bendability

Title (de)

Stahlblech mit guter Biegbarkeit

Title (fr)

Tôle d'acier présentant une excellente aptitude au pliage

Publication

EP 1389639 A3 20050608 (EN)

Application

EP 03254606 A 20030724

Priority

JP 2002219662 A 20020729

Abstract (en)

[origin: EP1389639A2] A steel sheet with excellent bendability in which the main structure is composed of retained austenite (5-30 area%) and ferrite (no less than 50 area%) such that there exist no more than 40 carbide grains per 2000 mu m<2> between the retained austenite and the ferrite. The steel sheet is suitable for automobiles which exhibits bending properties (bendability and tight bendability) even though its strength is as high as 600 to 1400 MPa.

IPC 1-7

C22C 38/02; C22C 38/04; C22C 38/06

IPC 8 full level

C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/16 (2006.01); C21D 1/18 (2006.01); C21D 1/20 (2006.01)

CPC (source: EP US)

C21D 8/0273 (2013.01 - EP US); C21D 9/46 (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); C21D 1/185 (2013.01 - EP US); C21D 1/20 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP US); C21D 2211/003 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US)

Citation (search report)

  • [X] EP 1201780 A1 20020502 - NIPPON STEEL CORP [JP]
  • [X] EP 0974677 A1 20000126 - NIPPON STEEL CORP [JP]
  • [X] EP 0707087 A1 19960417 - NIPPON STEEL CORP [JP]
  • [X] EP 0922782 A1 19990616 - KAWASAKI STEEL CO [JP]
  • [A] EP 0586704 A1 19940316 - NIPPON STEEL CORP [JP]
  • [X] PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12 29 October 1999 (1999-10-29)
  • [X] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 12 3 January 2001 (2001-01-03)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 02 29 February 2000 (2000-02-29)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 23 10 February 2001 (2001-02-10)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 1999, no. 05 31 May 1999 (1999-05-31)
  • [A] SPIEKERMANN P: "LEGIERUNGEN - EIN BESONDERES PATENTRECHTLICHES PROBLEM? - LEGIERUNGSPRUEFUNG IM EUROPAEISCHEN PATENTAMT -", MITTEILUNGEN DER DEUTSCHEN PATENTANWAELTE, HEYMANN, KOLN,, DE, 1993, pages 178 - 190, XP000961882, ISSN: 0026-6884

Designated contracting state (EPC)

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

DOCDB simple family (publication)

EP 1389639 A2 20040218; EP 1389639 A3 20050608; EP 1389639 B1 20110105; JP 2004059996 A 20040226; JP 3828466 B2 20061004; US 2004159373 A1 20040819

DOCDB simple family (application)

EP 03254606 A 20030724; JP 2002219662 A 20020729; US 62661203 A 20030725