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:
Jun. 16, 2026
Filed:
Dec. 10, 2021
Arcelormittal, Luxembourg, LU;
Xavier Garat, Homécourt, FR;
Pascal Lorenzini, Woippy, FR;
ArcelorMittal, Luxembourg, LU;
Abstract
A low density hot rolled steel including of 0.12%≤carbon≤0.25%, 3%≤manganese≤10%, 3.5%≤aluminum≤6.5%, 0%≤phosphorus≤0.1%, 0%≤sulfur≤0.03%, 0%≤nitrogen≤0.1%, 0%≤silicon≤2%, 0.01%≤niobium≤0.03%, 0.01%≤titanium≤0.2%, 0%≤molybdenum≤0.5%, 0%≤chromium≤0.6%, 0.01%≤copper≤2.0%, 0.01%≤nickel≤3.0%, 0%≤calcium≤0.005%, 0%≤boron≤0.01%, 0%≤Magnesium≤0.005%, 0%≤Zirconium≤0.005%, 0%≤Cerium≤0.1%, and the balance including iron and unavoidable impurities, the steel sheet having a microstructure including of ferrite from 60% to 80%, 10% to 35% kappa carbides (Fe,Mn)AIC, where x is lower than or equal to 1 and austenite from 0% to 10% wherein the microstructure grains having less than 4 GPa nano-hardness must be more than 45% and microstructure grains having nano-hardness of more than 5 GPa must be less than 10%.