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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 12753454 B1

PDFFull Text
Date of Patent:
Oct. 06, 2026

Filed:

Mar. 11, 2021

High strength steel sheet and method of producing same

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Thihuyen Doan, Tokyo, JP;

Sota Goto, Tokyo, JP;

Hiroshi Hasegawa, Tokyo, JP;

Noriaki Moriyasu, Tokyo, JP;

Takanori Umino, Tokyo, JP;

Takeshi Ueda, Tokyo, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

KENJA IP LAW PC

Primary Examiner:

Jenny R Wu

Int. Cl.
CPC ...
C21D 9/46 (2006.01); B21C 47/02 (2006.01); C21D 8/02 (2026.01); C21D 8/0221 (2026.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); B21C 47/02 (2013.01); C21D 8/0226 (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); C21D 2211/001 (2013.01); C21D 2211/002 (2013.01); C21D 2211/008 (2013.01);
Abstract

Provided is a high strength steel sheet that has a tensile strength of 1180 MPa or more and a uniform elongation of 6% or more. The high strength steel sheet has a chemical composition that contains predetermined components with a MSC of 3.0 mass % to 4.2 mass %. The high strength steel sheet has a microstructure including upper bainite in an area fraction of 70% or more as a main phase, fresh martensite and retained austenite in a total area fraction of 7% to 30%, with the retained austenite having an area fraction of 2% or more. The high strength steel sheet has a mechanical property with a uniform elongation of 6% or more and a tensile strength of 1180 MPa or more.

Find Patent Forward Citations

Doan, Thihuyen. (2026). High strength steel sheet and method of producing same (U.S. Patent No. 12753454). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12753454

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

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