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:
Oct. 21, 2014
Filed:
Jan. 23, 2009
Christoph Kaucke, Düsseldorf, DE;
Guido Kubla, Bottrop, DE;
Heinz Sanders, Mülheim, DE;
Charles Stallybrass, Düsseldorf, DE;
André Schneider, Mönchengladbach, DE;
Markus Schütz, Gladbeck, DE;
Christoph Kaucke, Düsseldorf, DE;
Guido Kubla, Bottrop, DE;
Heinz Sanders, Mülheim, DE;
Charles Stallybrass, Düsseldorf, DE;
André Schneider, Mönchengladbach, DE;
Markus Schütz, Gladbeck, DE;
Vallourec Deutschland GmbH, Duesseldorf, DE;
Abstract
The invention relates to a steel alloy for a low alloy steel for producing high-tensile, weldable, hot-rolled seamless steel tubing, in particular construction tubing. The chemical composition (in % by mass) is: 0.15-0.18% C; 0.20-0.40% Si; 1.40-1.60% Mn; max. 0.05% P; max. 0.01% S; >0.50-0.90% Cr; >0.50-0.80% Mo; >0.10-0.15% V; 0.60-1.00% W; 0.0130-0.0220% N; the remainder is made up of iron with production-related impurities; with the optional addition of one or more elements selected from Al, Ni, Nb, Ti, with the proviso that the relationship V/N has a value of between 4 and 12 and the Ni content of the steel is not more than 0.40%.