(19)

(11)

EP 3 215 648 A1

(12)

(43) Date of publication: 13.09.2017 Bulletin 2017/37 (21) Application number: 15790515.9 (22) Date of filing: 02.11.2015

(51) International Patent Classification (IPC):  C22C 21/02(2006.01) C22F 1/05(2006.01) C22C 21/08(2006.01) (86) International application number: PCT/EP2015/075401 (87) International publication number: WO 2016/071257 (12.05.2016 Gazette 2016/19)

(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: MA MD (30) Priority: 05.11.2014 EP 14003717 (71) Applicant: Constellium Valais SA (AG, Ltd) 3960 Sierre (CH)	(72) Inventors: SKUBICH, Alexis CH-8004 Zurich (CH) JARRETT, Martin Oxford Oxfordshire OX17 1RB (GB) BERTHERAT, Marc CH-3960 Sierre (CH) (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)