(19)
(11) EP 0 109 350 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.08.1987 Bulletin 1987/35

(43) Date of publication A2:
23.05.1984 Bulletin 1984/21

(21) Application number: 83730106

(22) Date of filing: 09.11.1983
(84) Designated Contracting States:
DE FR SE

(30) Priority: 10.11.1982 JP 19736282
13.06.1983 JP 10409483
13.06.1983 JP 10409583
29.08.1983 JP 15642783

(71) Applicants:
  • MITSUBISHI JUKOGYO KABUSHIKI KAISHA
     ()
  • SUMITOMO METAL INDUSTRIES, LTD.
     ()

(72) Inventors:
  • Yonezawa, Toshio Takasago Technical Institute
     ()
  • Sasaguri, Nobuya Takasago Technical Institute
     ()
  • Onimura, Kichiro Takasago Technical Institute
     ()
  • Susukida, Hiroshi Takasago Technical Institute
     ()
  • Kawaguchi, Katsuji Takasago Technical Institute
     ()
  • Kusakabe, Takaya c/o Kobe Shipyard & Engine Works
     ()
  • Nagano, Hiroo
     ()
  • Minami, Takao
     ()
  • Yamanaka, Kazuo
     ()
  • Okada, Yasutaka
     ()
  • Inoue, Mamoru
     ()

   


(54) Nickel-chromium alloy


(57) The present invention provides a nickel-chromium alloy in which it has an excellent mechanical character and improves a pitting corrosion resistance, a stress corrosion cracking resistance and a crystal boundary etching resistance, and the Ni-Cr alloy is obtained by carrying out an annealing treatment under required conditions, said alloy having the following composition:

in therms of % by weight,

40 - 70% of Ni;

0.015% or less of C;

1.0% or less of Si;

25 - 35% of Cr;

1.0% or less of Mn;

0.030% or less of P;

0.020% or less of S and

the residue comprising Fe and impurities.









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