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EP 4 334 486 A1

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(43) Date of publication: 13.03.2024 Bulletin 2024/11 (21) Application number: 22723453.1 (22) Date of filing: 21.04.2022

(51) International Patent Classification (IPC):  C22C 21/08(2006.01) C22F 1/047(2006.01) (52) Cooperative Patent Classification (CPC): C22C 21/08; C22F 1/047 (86) International application number: PCT/EP2022/060502 (87) International publication number: WO 2022/233577 (10.11.2022 Gazette 2022/45)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 04.05.2021 FR 2104673 (71) Applicants: Constellium Neuf Brisach 68600 Biesheim (FR) Constellium Muscle Shoals LLC Muscle Shoals, AL 35661 (US) Constellium Rolled Products Singen GmbH & Co.KG 78224 Singen (DE)

(72) Inventors: GUIGLIONDA, Gilles 38170 Seyssinet-Pariset (FR) ARBAB, Alireza 38140 Rices-Sur-Fure (FR) (74) Representative: Constellium - Propriété Industrielle  C-TEC Constellium Technology Center Propriété Industrielle Parc Economique Centr'Alp 725, rue Aristide Bergès CS10027 38341 Voreppe 38341 Voreppe (FR)