(19)

(11)

EP 2 364 373 A1

(12)

(43) Date of publication: 14.09.2011 Bulletin 2011/37 (21) Application number: 09768370.0 (22) Date of filing: 08.12.2009

(51) International Patent Classification (IPC):  C21D 8/06(2006.01) C21D 9/52(2006.01) B21B 45/02(2006.01) C21D 9/573(2006.01) (86) International application number: PCT/EP2009/066580 (87) International publication number: WO 2010/066708 (17.06.2010 Gazette 2010/24)

(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: 09.12.2008 EP 08171107 (71) Applicant: NV Bekaert SA 8550 Zwevegem (BE)	(72) Inventor: MESPLONT, Christophe F-59170 Croix (FR) (74) Representative: Seynhaeve, Geert Filiep  NV Bekaert SA D.I.E. Bekaertstraat 2 8550 Zwevegem 8550 Zwevegem (BE)