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EP 1 825 014 A1

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(43) Date of publication: 29.08.2007 Bulletin 2007/35 (21) Application number: 05856389.1 (22) Date of filing: 28.09.2005

(51) International Patent Classification (IPC):  C22C 38/08(2006.01) (86) International application number: PCT/KR2005/003213 (87) International publication number: WO 2006/080658 (03.08.2006 Gazette 2006/31)

(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: 12.11.2004 KR 20040092554 01.12.2004 KR 20040098152 01.12.2004 KR 20040109217 01.12.2004 KR 20040109218 01.12.2004 KR 20040109220 01.12.2004 KR 20040109221 21.12.2004 KR 20040109647 (71) Applicant: Posco Pohang-si, Kyungsangbook-do 790-300 (KR)

(72) Inventors: JUNG, Hwan-Gyo, POSCO Pohang Kyungsangbook-do 790-300 (KR) YOO, Jang-Yong, POSCO Pohang Kyungsangbook-do 790-300 (KR) UM, Kyung-Keun, POSCO Pohang Kyungsangbook-do 790-300 (KR) JUNG, Eui-Gyeong, POSCO Pohang Kyungsangbook-do 790-300 (KR) CHOI, Jong-Kyo, POSCO Pohang Kyungsangbook-do 790-300 (KR) LEE, Jae-Sang, POSCO Pohang Kyungsangbook-do 790-300 (KR) (74) Representative: McGowan, Cathrine  D Young & Co 120 Holborn London EC1N 2DY London EC1N 2DY (GB)