(19)

(11)

EP 4 441 267 A1

(12)

(43) Date of publication: 09.10.2024 Bulletin 2024/41 (21) Application number: 22823461.3 (22) Date of filing: 30.11.2022

(51) International Patent Classification (IPC):  C22C 21/02(2006.01) C22F 1/043(2006.01) C22C 21/08(2006.01) C22F 1/05(2006.01) (52) Cooperative Patent Classification (CPC): C22C 21/02; C22C 21/08; C22F 1/05; C22F 1/043 (86) International application number: PCT/EP2022/083823 (87) International publication number: WO 2023/099550 (08.06.2023 Gazette 2023/23)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 01.12.2021 EP 21211696 (71) Applicants: Constellium Bowling Green LLC Bowling Green, KY 42101 (US) Constellium Muscle Shoals LLC Muscle Shoals, AL 35661 (US) Constellium Neuf-Brisach 68600 Biesheim (FR)

(72) Inventors: LANGILLE, Michael 38600 Fontaine (FR) DODGE, Philip Plymouth, Michigan 48170 (US) (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)