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EP 4 313 438 A1

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(43) Date of publication: 07.02.2024 Bulletin 2024/06 (21) Application number: 22718286.2 (22) Date of filing: 22.03.2022

(51) International Patent Classification (IPC):  B21C 37/16(2006.01) B21J 13/02(2006.01) B21K 21/16(2006.01) B21J 5/08(2006.01) B21J 13/14(2006.01) (52) Cooperative Patent Classification (CPC): B21K 21/16; B21J 5/08; B21J 13/02; B21J 13/14; B21C 37/16 (86) International application number: PCT/IB2022/052595 (87) International publication number: WO 2022/201014 (29.09.2022 Gazette 2022/39)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 24.03.2021 IN 202131012691 (71) Applicant: Tata Steel Limited Jamshedpur, Jharkhand 831001 (IN)

(72) Inventors: GUJRE, Vinay Sanjay Jamshedpur 831 001, Jharkhand, India Jharkhand 831 001 (IN) LAKSHMIKANT, Pala Jamshedpur 831 001, Jharkhand, India Jharkhand 831 001 (IN) KALUBHAI BHARODIYA, Vishal Jamshedpur 831 001, Jharkhand, India Jharkhand 831 001 (IN) KUMAR VERMA, Rahul Jamshedpur 831 001, Jharkhand, India Jharkhand 831 001 (IN) (74) Representative: Dehns  St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)