(19)

(11)

EP 1 929 059 A1

(12)

(43) Date of publication: 11.06.2008 Bulletin 2008/24 (21) Application number: 06783735.1 (22) Date of filing: 24.08.2006

(51) International Patent Classification (IPC):  C22C 38/00(2006.01) (86) International application number: PCT/KR2006/003348 (87) International publication number: WO 2007/024114 (01.03.2007 Gazette 2007/09)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 25.08.2005 KR 20050078433 (71) Applicant: Posco Pohang-si, Kyungsangbook-do 790-300 (KR)	(72) Inventors: SOHN, Il-Ryoung Gwangyang Cheonlanam-do 545-711 (KR) CHIN, Kwang-Geun Gwangyang Cheonlanam-do 545-711 (KR) KANG, Hee-Jae Gwangyang Cheonlanam-do 545-711 (KR) KIM, Sung-Il Gwangyang Cheonlanam-do 545-711 (KR) (74) Representative: Larcher, Dominique  Cabinet Vidon, 16 B, rue Jouanet, B.P. 90333, Technopole Atalante 35703 Rennes Cédex 7 35703 Rennes Cédex 7 (FR)