(19)

(11)

EP 4 308 736 A1

(12)

(43) Date of publication: 24.01.2024 Bulletin 2024/04 (21) Application number: 22718071.8 (22) Date of filing: 17.03.2022

(51) International Patent Classification (IPC):  C21D 1/18(2006.01) C22C 38/02(2006.01) C22C 38/12(2006.01) C23C 2/00(2006.01) C21D 1/673(2006.01) C21D 9/48(2006.01) C21D 8/04(2006.01) C22C 38/04(2006.01) C22C 38/22(2006.01) B21D 22/02(2006.01) C21D 9/00(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/02; C22C 38/04; C22C 38/12; C22C 38/22; C21D 1/18; C21D 8/04; C21D 1/673; C21D 9/0068; C21D 9/48; C21D 2211/002; C21D 2211/008; C23C 2/02; C23C 2/28; C23C 2/06; C23C 2/12; C23C 30/00 (86) International application number: PCT/EP2022/057019 (87) International publication number: WO 2022/195024 (22.09.2022 Gazette 2022/38)

(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: 17.03.2021 EP 21163271 (71) Applicant: Tata Steel IJmuiden B.V. 1951 JZ Velsen-Noord (NL)	(72) Inventor: RANA, Radhakanta 1970 CA IJmuiden (NL)