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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.:

US 9841124 B1

PDFFull Text
Date of Patent:
Dec. 12, 2017

Filed:

Apr. 11, 2013

High-strength thick-walled electric resistance welded steel pipe having excellent low-temperature toughness and method of manufacturing the same

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Shunsuke Toyoda, Kawasaki, JP;

Sota Goto, Chita, JP;

Takatoshi Okabe, Chita, JP;

Tomohiro Inoue, Chita, JP;

Motoharu Egi, Chita, JP;

Atsushi Yonemoto, Chita, JP;

Assignee:

JFE Steel Corporation, , JP;

Attorney:

DLA Piper LLP (US)

Primary Examiner:

Michael E La Villa

Int. Cl.
CPC ...
F16L 9/02 (2006.01); F16L 9/17 (2006.01); B21C 37/08 (2006.01); B23K 11/087 (2006.01); B23K 11/00 (2006.01); B21B 27/06 (2006.01); B32B 1/08 (2006.01); B21B 3/00 (2006.01); C21D 8/02 (2006.01); C21D 9/08 (2006.01); C21D 1/00 (2006.01); C22C 38/14 (2006.01); C22C 38/58 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/16 (2006.01); B21B 27/08 (2006.01); C21D 9/50 (2006.01); C21D 8/10 (2006.01);
U.S. Cl.
CPC ...
F16L 9/02 (2013.01); B21B 3/00 (2013.01); B21B 27/08 (2013.01); B21C 37/08 (2013.01); B23K 11/0073 (2013.01); B23K 11/0873 (2013.01); B32B 1/08 (2013.01); C21D 1/00 (2013.01); C21D 8/02 (2013.01); C21D 8/0226 (2013.01); C21D 8/0263 (2013.01); C21D 9/08 (2013.01); C21D 9/085 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/58 (2013.01); F16L 9/17 (2013.01); C21D 8/105 (2013.01); C21D 9/50 (2013.01); C21D 2211/005 (2013.01); Y10T 428/12958 (2015.01); Y10T 428/12965 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/12979 (2015.01); Y10T 428/13 (2015.01);
Abstract

A high-strength thick-walled electric resistance welded steel pipe has excellent low-temperature toughness and excellent HIC resistance and a yield strength of 400 MPa or more. The steel has a chemical composition consisting of C: 0.025% to 0.084%, Si: 0.10% to 0.30%, Mn: 0.70% to 1.80%, controlled amounts of P, S, Al, N, and O, Nb: 0.001% to 0.065%, V: 0.001% to 0.065%, Ti: 0.001% to 0.033%, and Ca: 0.0001% to 0.0035% on a mass percent basis and the remainder being Fe and incidental impurities, and satisfies Pcm of 0.20 or less.

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