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.:
Date of Patent:
Dec. 23, 2025
Filed:
Aug. 05, 2021
Nippon Steel Corporation, Tokyo, JP;
Mitsuru Yoshida, Tokyo, JP;
Tsuyoshi Yamazaki, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
This steel sheet has a predetermined chemical composition, at a depth position of ¼ of a sheet thickness from a surface, an area fraction of GAMis 50% or more and 100% or less, an area fraction of GAMis 0% or more and 20% or less, an area fraction of GAMis 0% or more and less than 50%, an area fraction of residual austenite is 0% or more and less than 4%, a total area fraction of the residual austenite, fresh martensite, cementite and pearlite is 0% or more and 10% or less, an average grain size is 15.0 μm or less, an average dislocation density is 1.0×10/mor more and 4.0×10/mless, a total of pole densities of {211}<011> and {332}<113> in a thickness middle portion is 12.0 or less, and a tensile strength is 980 MPa or more.