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:
Nov. 25, 2025
Filed:
Dec. 17, 2020
Arcelormittal, Luxembourg, LU;
Astrid Perlade, Le Ban-Saint-Martin, FR;
Kangying Zhu, Metz, FR;
Coralie Jung, Metz, FR;
Frederic Kegel, Yutz, FR;
ArcelorMittal, Luxembourg, LU;
Abstract
A hot rolled steel sheet having a composition including, by weight percent: C: 0.10-0.25%, Mn: 3.5-5.0%, Si: 0.80-1.60%, B: 0.0003-0.004%, S≤0.010%, P≤0.020%, N≤0.008% the remainder of the composition being iron and unavoidable impurities resulting from the smelting, and having a microstructure consisting of, in surface fraction: between 50% and 80% of lath bainite, lower than 30% of granular bainite, the rest being martensite, martensite-austenite islands and austenite films, and having less than 20% of martensite and M-A islands having the multiplication of the maximum length Lof the grain by the maximum width Wof the grain higher than 1 μm.