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:
Jan. 03, 1995
Filed:
Nov. 05, 1993
Applicant:
Inventors:
Nobuo Otsuka, Nishinomiya, JP;
Takeo Kudo, Nishinomiyashi, JP;
Assignee:
Sumitomo Metal Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
4205861 ; 420586 ; 148909 ;
Abstract
A corrosion-resistant austenitic alloy suitable for use in heat transfer tubes for heat-recovery boilers which withstands uniform corrosion, intergranular corrosion, and stress corrosion cracking in refuse-fired boilers and black-liquor combustion boilers. The alloy consists essentially, on a weight basis, of C: not more than 0.05%, Si: not more than 4%, Mn: not more than 7.5%, Ni: 25-55%, Cr: more than 20% and not more than 35%, Mo: an amount satisfying the following inequality (1) when Mn(%).ltoreq.2.5 or inequality (2) when 2.5.ltoreq.Mn(%).ltoreq.7.5,