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:
Jul. 14, 2015
Filed:
Jul. 03, 2009
Bernd Hahn, Ratingen, DE;
Joachim Konrad, Düsseldorf, DE;
André Schneider, Paderborn, DE;
Charles Stallybrass, Düsseldorf, DE;
Bernd Hahn, Ratingen, DE;
Joachim Konrad, Düsseldorf, DE;
André Schneider, Paderborn, DE;
Charles Stallybrass, Düsseldorf, DE;
VALLOUREC DEUTSCHLAND GMBH, Düsseldorf, DE;
Abstract
A steel alloy with excellent creep strength and corrosion resistance that is ferritic at usage temperatures above 620° C. has the following chemical composition (in wt. %): C≦1.0%; Si≦1.0%; Mn≦1.0%; P max. 0.05%; S max. 0.01%; 2≦Al≦12%; 3≦Cr≦16%; 2≦Ni≦10% and/or 2≦Co≦10%, where 2≦Ni+Co≦[% Cr]+2.07×[% Al]>=0.95×([% Ni]+[% Co]); N max. 0.0200%. The remainder is iron with steel production-related impurities. Optionally, one or more elements of V, Ti, Ta, Zr, Nb, Mo and W, as well as one or more elements of Hf, B, Se, Y, Te, Sb, La and Zr with a cumulative content of <0.1% can be added. The steel structure includes uniformly distributed coherent precipitates based on a chromium-stabilized (Ni, Co)Al—B2 intermetallic ordered phase.