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:
Jul. 28, 2026
Filed:
Dec. 17, 2019
Arcelormittal, Luxembourg, LU;
Patrice Alexandre, Metz, FR;
Magali Bouzat, Norroy-Le-Veneur, FR;
Anirban Chakraborty, Chesterton, IN (US);
Hassan Ghassemi-Armaki, Schererville, IN (US);
Olga Girina, Munster, IN (US);
Ronan Jacolot, Landonvillers, FR;
Alexey Koltsov, Neufgrange, FR;
Aude Nadler, Saint-Avold, FR;
Damon Panahi, Chicago, IL (US);
Michel Soler, Ars Laquenexy, FR;
ArcelorMittal, Luxembourg, LU;
Abstract
A cold rolled and heat-treated steel sheet having a composition including, by weight percent: C 0.3-0.4%, Mn 2.0-2.6%, Si: 0.8-1.6%, Al 0.01-0.6%, Mo 0.15-0.5%, Cr 0.3-1.0%, Nb≤0.06%, Ti≤0.06%, Ni≤0.8%, S≤0.010%, P≤0.020% and 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 15% and 30% of retained austenite, said retained austenite having a carbon content of at least 0.7%, between 70% and 85% of tempered martensite, at most 5% of fresh martensite and at most 5% of bainite. It also deals with a manufacturing method thereof.