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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 10081042 B1

PDFFull Text
Date of Patent:
Sep. 25, 2018

Filed:

Aug. 07, 2014

Electric resistance welded steel pipe excellent in weld zone and method of production of same

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Hideki Hamatani, Tokyo, JP;

Kenichi Yamamoto, Tokyo, JP;

Masafumi Miyazaki, Tokyo, JP;

Masaki Ina, Tokyo, JP;

Takaaki Fukushi, Tokyo, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Scott R Kastler

Int. Cl.
CPC ...
C22C 38/26 (2006.01); C22C 38/02 (2006.01); B21C 37/08 (2006.01); C22C 38/00 (2006.01); C22C 38/14 (2006.01); C22C 38/58 (2006.01); C21D 8/10 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01); B22D 11/00 (2006.01); B23K 11/087 (2006.01); B23K 11/34 (2006.01); C21D 9/14 (2006.01); C22C 33/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/16 (2006.01); C22C 38/24 (2006.01); C22C 38/28 (2006.01); C21D 9/08 (2006.01);
U.S. Cl.
CPC ...
B21C 37/08 (2013.01); B22D 11/001 (2013.01); B23K 11/0873 (2013.01); B23K 11/34 (2013.01); C21D 8/105 (2013.01); C21D 9/14 (2013.01); C22C 33/04 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (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 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/58 (2013.01); C21D 9/08 (2013.01);
Abstract

Electric resistance welded steel pipe excellent in weld zone quality suitable for oil country tubular goods and line pipe wherein steel plate forming the base metal of the electric resistance welded steel pipe has a predetermined chemical composition, the contents of Ca, O, S, Ce, La, and Al satisfy the oxide-based inclusions in the weld zone of the electric resistance welded steel pipe contains one or both of Ce and La, and the long axis/short axis of the oxide-based inclusions is 2.5 or less.

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