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:
Dec. 11, 2012
Filed:
May. 18, 2007
Applicants:
Hiroyasu Yokoyama, Chita, JP;
Kazuhito Kenmochi, Chiba, JP;
Takatoshi Okabe, Chita, JP;
Yukinori Iizuka, Kawasaki, JP;
Inventors:
Hiroyasu Yokoyama, Chita, JP;
Kazuhito Kenmochi, Chiba, JP;
Takatoshi Okabe, Chita, JP;
Yukinori Iizuka, Kawasaki, JP;
Assignee:
JFE Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 38/02 (2006.01); C22C 38/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an electric resistance welded steel pipe with excellent weld toughness for a line pipe, the area fraction of minute defects each having a maximum length of less than 50 μm in a projection plane of an electric resistance welded seam is in the range of 0.000006 to 0.026, and the absorbed energy at −40° C. measured by a method for an impact test of metallic materials is 315 J or more.