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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 11079045 B1

PDFFull Text
Date of Patent:
Aug. 03, 2021

Filed:

Aug. 31, 2017

Electric resistance welded clad steel pipe or tube and method of producing same

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Shinsuke Ide, Tokyo, JP;

Akihide Matsumoto, Tokyo, JP;

Atsushi Matsumoto, Tokyo, JP;

Takatoshi Okabe, Tokyo, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

Kenja IP Law PC

Primary Examiner:

Adam Krupicka

Int. Cl.
CPC ...
F16L 9/17 (2006.01); B23K 13/06 (2006.01); B21C 37/08 (2006.01); B23K 13/00 (2006.01); C22C 38/00 (2006.01); C21D 9/08 (2006.01); C21D 9/50 (2006.01); C22F 1/00 (2006.01); C22C 38/60 (2006.01); B23K 11/00 (2006.01); B23K 11/02 (2006.01); B23K 11/093 (2006.01); B32B 1/08 (2006.01); B32B 15/01 (2006.01); C22C 19/05 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22F 1/10 (2006.01); B23K 103/04 (2006.01); B23K 101/10 (2006.01);
U.S. Cl.
CPC ...
F16L 9/17 (2013.01); B21C 37/08 (2013.01); B23K 11/0006 (2013.01); B23K 11/02 (2013.01); B23K 11/0935 (2013.01); B23K 13/00 (2013.01); B23K 13/06 (2013.01); B32B 1/08 (2013.01); B32B 15/011 (2013.01); B32B 15/015 (2013.01); C21D 9/08 (2013.01); C21D 9/085 (2013.01); C21D 9/50 (2013.01); C22C 19/056 (2013.01); C22C 38/00 (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 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/60 (2013.01); C22F 1/00 (2013.01); C22F 1/10 (2013.01); B23K 2101/10 (2018.08); B23K 2103/05 (2018.08); B32B 2597/00 (2013.01);
Abstract

Provided is an electric resistance welded clad steel pipe or tube in which a region where solidification microstructure is formed, i.e. a region in a weld particularly having significant influence on properties, is reduced without impairing its function as a clad pipe or tube. An electric resistance welded clad steel pipe or tube comprises: a first layer made of carbon steel or low-alloy steel as base metal; and a second layer placed on one surface of the first layer, and made of stainless steel or a nickel-containing alloy as cladding metal, wherein the base metal is not exposed at a cladding metal-side surface of the electric resistance welded clad steel pipe or tube in a weld, and no solidification microstructure is contained in each of circular sections of 0.1 mm in radius respectively centered at specific three positions in a plane perpendicular to a pipe or tube longitudinal direction.

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