(19)

(11)

EP 2 376 666 A2

(12)

(88) Date of publication A3: 23.09.2010 (43) Date of publication: 19.10.2011 Bulletin 2011/42 (21) Application number: 09835310.5 (22) Date of filing: 28.12.2009

(51) International Patent Classification (IPC):  C22C 38/00(2006.01) C22C 38/54(2006.01) C22C 38/32(2006.01) (86) International application number: PCT/KR2009/007846 (87) International publication number: WO 2010/074544 (01.07.2010 Gazette 2010/26)

(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 MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 26.12.2008 KR 20080134348 (71) Applicant: Posco Pohang Kyungsangbook-do 790-300 (KR)	(72) Inventors: LEE, Jae-Seung Pohang Kyungsangbook-do 790-300 (KR) LEE, Sang-Yoon Pohang Kyungsangbook-do 790-300 (KR) JUNG, Hoe-Young Pohang Kyungsangbook-do 790-300 (KR) PARK, Byoung-Ju Pohang Kyungsangbook-do 790-300 (KR) (74) Representative: Zech, Stefan Markus  Meissner, Bolte & Partner GbR Postfach 86 06 24 81633 München 81633 München (DE)