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:
Mar. 15, 2005
Filed:
Feb. 28, 2001
Nobuhiro Fujita, Futtsu, JP;
Naoki Yoshinaga, Futtsu, JP;
Manabu Takahashi, Futtsu, JP;
Hitoshi Asahi, Futtsu, JP;
Yasuhiro Shinohara, Futtsu, JP;
Yasushi Hasegawa, Tokai, JP;
Nobuhiro Fujita, Futtsu, JP;
Naoki Yoshinaga, Futtsu, JP;
Manabu Takahashi, Futtsu, JP;
Hitoshi Asahi, Futtsu, JP;
Yasuhiro Shinohara, Futtsu, JP;
Yasushi Hasegawa, Tokai, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
The present invention is a high strength steel pipe excellent in formability in hydroforming and similar forming methods, characterized by: containing, in mass, C of 0.0005 to 0.30%, Si of 0.001 to 2.0%, Mn of 0.01 to 3.0% and appropriate amounts of other elements if necessary, with the balance consisting of Fe and unavoidable impurities; and an average for the ratios of the X-ray strength in the orientation component group of {110}<110> to {111}<110> to random X-ray diffraction strength on a plane at the wall thickness center being 2.0 or more and/or a ratio of the X-ray strength in the orientation component of {110}<110> to random X-ray diffraction strength on the plane at the wall thickness center being 3.0 or more.