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:
May. 13, 2025
Filed:
Sep. 04, 2020
Nippon Steel Corporation, Tokyo, JP;
Hiroshi Shuto, Tokyo, JP;
Kazumasa Tsutsui, Tokyo, JP;
Koutarou Hayashi, Tokyo, JP;
Akifumi Sakakibara, Tokyo, JP;
Jun Ando, Tokyo, JP;
Shota Endo, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
This hot-rolled steel sheet has a predetermined chemical composition, in which a microstructure contains, by area %, less than 3.0% of residual austenite, 15.0% or more and less than 60.0% of ferrite, and less than 5.0% of pearlite, has a ratio L/Lof a length Lof a grain boundary having a crystal misorientation of 60° to a length Lof a grain boundary having a crystal misorientation of 7° about a <110> direction of less than 0.60, has a standard deviation of a Mn concentration of 0.60 mass % or less, and has a tensile strength of 980 MPa or more.