(19)

(11)

EP 2 035 169 A1

(12)

(43) Date of publication: 18.03.2009 Bulletin 2009/12 (21) Application number: 07747064.9 (22) Date of filing: 22.06.2007

(51) International Patent Classification (IPC):  B22D 11/108(2006.01) (86) International application number: PCT/KR2007/003032 (87) International publication number: WO 2007/148939 (27.12.2007 Gazette 2007/52)

(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 MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 22.06.2006 KR 20060056509 22.06.2006 KR 20060056510 (71) Applicant: POSCO Nam-Gu Pohang 790-300 (KR)	(72) Inventors: CHO, Jung Wook Pohang 790-300 (KR) JEONG, Hyun Seok Pohang 790-300 (KR) KIM, Goo Hwa Pohang 790-300 (KR) PARK, Joong Kil Pohang 790-300 (KR) LEE, Sang Ho Pohang 790-300 (KR) MOON, Ki Hyeon Pohang 790-300 (KR) (74) Representative: Zech, Stefan Markus  Meissner, Bolte & Partner GbR Postfach 86 06 24 81633 München 81633 München (DE)