Global Patent Index - EP 0835946 A1

EP 0835946 A1 19980415 - Weldable low-chromium ferritic cast steel, having excellent high-temperature strength

Title (en)

Weldable low-chromium ferritic cast steel, having excellent high-temperature strength

Title (de)

Schweissbares ferritisches Gussstahl mit niedrigem Chromgehalt und mit sehr gute Warmfestigkeit

Title (fr)

Acier de moulage ferritique soudable, à basse teneur en chrome et présentant une haute résistance mécanique aux températures élevées

Publication

EP 0835946 A1 19980415 (EN)

Application

EP 97306432 A 19970822

Priority

JP 26852996 A 19961009

Abstract (en)

This invention relates to low-Cr ferritic cast steels having excellent high-temperature strength, weldability, oxidation resistance and high-temperature corrosion resistance. These low-Cr ferritic cast steels consist essentially of, on a weight percentage basis, 0.03 to 0.12% C, 0.03 to 0.7% Si, 0.02 to 1% Mn, up to 0.3% Co, up to 0.025% P, up to 0.015% S, 0.8 to 3% Cr, 0.01 to 1% Ni, 0.01 to 0.5% V, 0.1 to 3% W, 0.01 to 0.2% Nb, 0.001 to 0.05% Al, 0.0001 to 0.02% B, 0.001 to 0.05% N, up to 0.03% O, 0.0005 to 0.05% Mg, and the balance being iron and incidental impurities, provided that the Mg content satisfies the following inequality as expressed on a weight percentage basis: <MATH> As a result, they exhibit excellent weldability and markedly improved high-temperature strength.

IPC 1-7

C22C 38/54; C22C 38/46

IPC 8 full level

C22C 38/00 (2006.01); C22C 38/46 (2006.01); C22C 38/54 (2006.01)

CPC (source: EP)

C22C 38/46 (2013.01); C22C 38/54 (2013.01)

Citation (search report)

  • [X] EP 0505732 A1 19920930 - SUMITOMO METAL IND [JP], et al
  • [X] EP 0560375 A2 19930915 - SUMITOMO METAL IND [JP], et al
  • [A] EP 0411515 A1 19910206 - MITSUBISHI HEAVY IND LTD [JP]
  • [A] DE 977847 C 19710902 - HUETTENWERK OBERHAUSEN AG
  • [X] PATENT ABSTRACTS OF JAPAN vol. 14, no. 522 (C - 778) 15 November 1990 (1990-11-15)
  • [X] PATENT ABSTRACTS OF JAPAN vol. 14, no. 522 (C - 778) 15 November 1990 (1990-11-15)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 15, no. 259 (C - 846) 2 July 1991 (1991-07-02)

Designated contracting state (EPC)

CH DE FR GB LI

DOCDB simple family (publication)

EP 0835946 A1 19980415; EP 0835946 B1 20011128; DE 69708574 D1 20020110; DE 69708574 T2 20020704; JP 3572152 B2 20040929; JP H10121188 A 19980512

DOCDB simple family (application)

EP 97306432 A 19970822; DE 69708574 T 19970822; JP 26852996 A 19961009