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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.:

US 12571066 B1

PDFFull Text
Date of Patent:
Mar. 10, 2026

Filed:

Jul. 10, 2025

Non-oriented electrical steel and a method of manufacturing non-oriented electrical steel thereof

Applicant:

Arcelormittal, Luxembourg, LU;

Inventors:

Sigrid Jacobs, Merelbeke, BE;

Xavier Chassang, St Chély d'Apcher, FR;

Elke Leunis, Ghent, BE;

Assignee:

ArcelorMittal, Luxembourg, LU;

Attorney:

Davidson Kappel LLC

Primary Examiner:

Anthony M Liang

Int. Cl.
CPC ...
C21D 9/46 (2006.01); C21D 1/84 (2006.01); C21D 6/00 (2006.01); C21D 8/12 (2006.01); C21D 8/1216 (2026.01); C21D 8/1244 (2026.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/20 (2006.01); C22C 38/34 (2006.01); H01F 1/147 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); C21D 1/84 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1261 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/20 (2013.01); C22C 38/34 (2013.01); H01F 1/14775 (2013.01); C21D 2211/005 (2013.01); C22C 2202/02 (2013.01);
Abstract

A non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.17%≤Manganese≤0.4%, 3%≤Silicon≤3.6%, 0.7%≤Aluminum≤1.3%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, with 3.85%≤Si+Al+Mn≤5.5% and can contain various optional elements the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel sheet being made of ferrite and including in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, less than 25% when calculated in accordance of Bertotti method.

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Jacobs, Sigrid. (2026). Non-oriented electrical steel and a method of manufacturing non-oriented electrical steel thereof (U.S. Patent No. 12571066). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12571066

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