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(11)

EP 2 629 906 A1

(12)

(43) Date of publication: 28.08.2013 Bulletin 2013/35 (21) Application number: 11776661.8 (22) Date of filing: 18.10.2011

(51) International Patent Classification (IPC):  B22D 1/00(2006.01) C22B 21/06(2006.01) C22B 9/05(2006.01) (86) International application number: PCT/US2011/056708 (87) International publication number: WO 2012/054478 (26.04.2012 Gazette 2012/17)

(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 (30) Priority: 18.10.2010 US 394117 P (71) Applicant: Alcoa Inc. Pittsburgh, PA 15212-5858 (US)	(72) Inventors: BRYANT, J., Daniel Murrysville, PA 15668 (US) BABCSAN, Norbert 3519 (HU) (74) Representative: Barton, Matthew Thomas  Forresters Skygarden Erika-Mann-Strasse 11 80636 München 80636 München (DE)