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EP 3 394 305 A1

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(43) Date of publication: 31.10.2018 Bulletin 2018/44 (21) Application number: 16844967.6 (22) Date of filing: 07.09.2016

(51) International Patent Classification (IPC):  C22C 21/10(2006.01) B22D 7/00(2006.01) B22D 19/16(2006.01) C22F 1/053(2006.01) (86) International application number: PCT/US2016/050523 (87) International publication number: WO 2017/044471 (16.03.2017 Gazette 2017/11)

(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: 09.09.2015 US 201562215842 P (71) Applicants: Constellium Rolled Products Ravenswood, LLC Ravenswood, WV 26164 (US) Constellium Valais SA (AG, Ltd) 3960 Sierre (CH)

(72) Inventors: FRANKLIN, Jack Plymouth, MA 48170 (US) KOBE, Paul, E. Ravenswood, WV 26164 (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)