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:
Aug. 31, 1993
Filed:
Jun. 02, 1992
Atsuro Iseda, Kobe, JP;
Yoshiatsu Sawaragi, Nishinomiya, JP;
Fujimitsu Mausyama, Nagasaki, JP;
Tomomitsu Yokoyama, Tokyo, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Mitsubishi Jukogyo Kabushiki Kaisya, Tokyo, JP;
Abstract
A Cu-containing, high-Cr ferritic, heat-resistant steel is prevented from copper checking without a reduction in strength, toughness, resistance to hot corrosion, or oxidation, and its weldability is maintained at satisfactory levels. The steel consists essentially, on a weight basis, of: C: 0.03-0.15%, Si: at most 0.7%, Mn: 0.1-1.5%, Ni: 0.05-1.0%, Cr: 8-14%, W: 0.8-3.5%, V: 0.1-0.3%, Nb: 0.01-0.2%, N: 0.001-0.1%, Al: at most 0.05%, Cu: 0.4-3.5%, B: 0-0.02%, one or more elements selected from the group consisting of La, Ce, Ca, Y, Ti, Zr, and Ta: 0-0.2% each, and a balance of Fe and incidental impurities, wherein the Cu and Ni contents satisfy the following Inequality: 2.5.ltoreq.(%Cu)/(%Ni).ltoreq.4.5.