The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 1987
Filed:
Nov. 15, 1985
Kazuo Yamanaka, Minooshi, JP;
Hiroo Nagano, Kobeshi, JP;
Takao Minami, Amagasakishi, JP;
Yaautaka Okada, Narashi, JP;
Mamoru Inoue, Kobeshi, JP;
Hiroshi Susukida, Takasago, JP;
Kichiro Onimura, Takasago, JP;
Toshio Yonezawa, Takasago, JP;
Nobuya Sasaguri, Takasago, JP;
Katsuji Kawaguchi, Takasago, JP;
Takaya Kusakabe, Kobe, JP;
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Abstract
An alloy for heat transfer pipes excellent in an alkali stress corrosion cracking resistance which is obtained by heating and retaining said alloy at a temperature within the range of a temperature (T.degree.C.), at which a carbide in said alloy is thoroughly solubilized, to T+100.degree. C. for 1 minute or more; cooling it once to a level of 200.degree. C. or less; and carrying out a thermal treatment under conditions within a hatched range Z in FIG. 2, said alloy comprising: in terms of % by weight, 0.15% or less of C; 1.0% or less of Si; 1.0% or less of Mn; 25 to 35% of Cr; 40 to 70% of Ni; 0.5% or less of Al; 0.01 to 1.0% of Ti; 0.5 to 5.0%, in all, of one or more of Mo, W and V; 0.30% or less of P; 0.020% or less of S; and the residue of Fe and impurities.