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EP 4 347 907 A1

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(43) Date of publication: 10.04.2024 Bulletin 2024/15 (21) Application number: 22730257.7 (22) Date of filing: 24.05.2022

(51) International Patent Classification (IPC):  C22C 21/02(2006.01) C22C 21/04(2006.01) B21C 23/00(2006.01) B21C 23/14(2006.01) C22F 1/043(2006.01) (52) Cooperative Patent Classification (CPC): C22C 21/02; C22C 21/04; C22F 1/043; B21C 23/142; B21C 23/002 (86) International application number: PCT/EP2022/064040 (87) International publication number: WO 2022/248465 (01.12.2022 Gazette 2022/48)

(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: 25.05.2021 EP 21175802 (71) Applicants: Constellium Singen GmbH 78224 Singen (DE) Constellium Extrusion Levice sro 934-01 Levice (SK)	(72) Inventors: BEN TAHAR, Mehdi 38000 Grenoble (FR) TIRARD-COLLET, Roland 38340 Voreppe (FR) JARRETT, Martin Little Bourton OX17 1RB (GB) (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)