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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 12344910 B1

PDFFull Text
Date of Patent:
Jul. 01, 2025

Filed:

Nov. 14, 2019

Duplex stainless steel, seamless steel pipe or tube, and a method of manufacturing the duplex stainless steel

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Yusuke Yoshimura, Tokyo, JP;

Shunsuke Sasaki, Tokyo, JP;

Yuichi Kamo, Tokyo, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

KENJA IP LAW PC

Primary Examiner:

Brian D Walck

Int. Cl.
CPC ...
C21D 9/08 (2006.01); C21D 6/00 (2006.01); C21D 8/10 (2006.01); C22C 38/00 (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 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
C21D 9/08 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/105 (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 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01);
Abstract

Provided is duplex stainless steel which has high strength and high toughness and can be subjected to hot working during manufacturing processes, the duplex stainless steel having a predetermined chemical composition and a microstructure containing an austenite phase in a volume fraction of 20% to 70% and a ferrite phase in a volume fraction of 30% to 80%, and mechanical properties such that a yield strength is 862 MPa or more and an absorption energy in a Charpy impact test at −10° C., vE, is 40 J or more.

Find Patent Forward Citations

Yoshimura, Yusuke. (2025). Duplex stainless steel, seamless steel pipe or tube, and a method of manufacturing the duplex stainless steel (U.S. Patent No. 12344910). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12344910

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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