(19)

(11)

EP 2 496 373 A1

(12)

(43) Date of publication: 12.09.2012 Bulletin 2012/37 (21) Application number: 10828596.6 (22) Date of filing: 05.11.2010

(51) International Patent Classification (IPC):  B22D 11/10(2006.01) B22D 35/04(2006.01) (86) International application number: PCT/NO2010/000403 (87) International publication number: WO 2011/056078 (12.05.2011 Gazette 2011/19)

(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 (30) Priority: 06.11.2009 NO 20093305 (71) Applicant: Norsk Hydro ASA 0240 Olso (NO)	(72) Inventors: HÅKONSEN, Arild N-6600 Sunndalsøra (NO) NÆSS, Jr., Harald N-6612 Grøa (NO) IVELAND, Terje N-6600 Sunndalsøra (NO) FAGERLIE, John Olav N-6600 Sunndalsøra (NO) (74) Representative: Hofseth, Svein  Patent and Trademark Department Hydro Aluminium AS 0240 Oslo 0240 Oslo (NO)