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. 07, 1997
Filed:
Sep. 18, 1995
Applicant:
Inventors:
Assignee:
Sumitomo Metal Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; C22C / ;
U.S. Cl.
CPC ...
420 38 ; 420 37 ;
Abstract
The present invention discloses high chromium ferritic heat-resistant steel which has remarkable properties that the base metal and welded joints of the steel both exhibit excellent long term creep strength at elevated temperatures over 600.degree. C. excellent resistance to steam oxidation, and excellent toughness at room temperatures. The chemical composition of main elements of the steel of the invention is as follows: