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(11)

EP 4 416 310 A1

(12)

(43) Date of publication: 21.08.2024 Bulletin 2024/34 (21) Application number: 22802956.7 (22) Date of filing: 14.10.2022

(51) International Patent Classification (IPC):  C21D 1/18(2006.01) C21D 8/02(2006.01) C22C 38/04(2006.01) C21D 6/00(2006.01) C21D 8/04(2006.01) (52) Cooperative Patent Classification (CPC): C21D 1/185; C21D 8/0273; C21D 8/0226; C22C 38/04; C21D 2211/005; C21D 2211/003; C21D 8/0478; C21D 6/005; C23C 2/02; C23C 2/26; C23C 2/28; C23C 2/06; C23C 2/40; C23C 24/04; C23C 28/021; C23C 28/025; C23C 30/00 (86) International application number: PCT/EP2022/078693 (87) International publication number: WO 2023/062210 (20.04.2023 Gazette 2023/16)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 15.10.2021 EP 21202973 (71) Applicant: Tata Steel IJmuiden B.V. 1951 JZ Velsen-Noord (NL)	(72) Inventor: CAMPANIELLO, Jean Joseph 1970 CA IJmuiden (NL) (74) Representative: Group Intellectual Property Services  c/o Tata Steel Nederland Technology B.V. P.O. Box 10000 - 3G.37 1970 CA IJmuiden 1970 CA IJmuiden (NL)