(19)

(11)

EP 2 235 228 A1

(12)

(43) Date of publication: 06.10.2010 Bulletin 2010/40 (21) Application number: 08861296.5 (22) Date of filing: 17.12.2008

(51) International Patent Classification (IPC):  C22C 38/40(2006.01) (86) International application number: PCT/KR2008/007474 (87) International publication number: WO 2009/078663 (25.06.2009 Gazette 2009/26)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 18.12.2007 KR 20070133576 (71) Applicant: POSCO Nam-gu Pohang-si, Gyeongsangbuk-do 790-300 (KR)	(72) Inventors: NAM, Ki Won 790-300 (KR) KIM, Young Hwan Pohang-si Gyeongsangbuk-do 790-300 (KR) KIM, Hak Pohang-si Gyeongsangbuk-do 790-300 (KR) LEE, Yong Heon Pohang-si Gyeongsangbuk-do 790-300 (KR) (74) Representative: Zech, Stefan Markus  Meissner, Bolte & Partner GbR Postfach 86 06 24 81633 München 81633 München (DE)