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(11)

EP 1 963 541 A1

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(43) Date of publication: 03.09.2008 Bulletin 2008/36 (21) Application number: 06745217.7 (22) Date of filing: 04.05.2006

(51) International Patent Classification (IPC):  C21C 5/42(2006.01) C21C 5/46(2006.01) C21C 7/00(2006.01) C22B 9/00(2006.01) C21C 5/44(2006.01) C21C 5/48(2006.01) C21B 7/16(2006.01) F27B 3/22(2006.01) (86) International application number: PCT/IN2006/000153 (87) International publication number: WO 2007/054957 (18.05.2007 Gazette 2007/20)

(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: 10.11.2005 IN KO10232005 (71) Applicant: Tata Steel Limited Jamshedpur 831 001 (IN)	(72) Inventors: SAMBASIVAM, Rajamani Jamshedpur 831 001 (IN) LENKA, Surya, Narayan Jamshedpur 831 001 (IN) DURST, Franz Nürnberg (DE) CHANDRA, Sanjay Jamshedpur 831 001 (IN) AJMANI, Satish, Kumar Jamshedpur 831 001 (IN) (74) Representative: Green, Mark Charles  Urquhart-Dykes & Lord LLP 30 Welbeck Street London W1G 8ER London W1G 8ER (GB)