(19)

(11)

EP 4 824 293 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24824460.0 (22) Date of filing: 29.11.2024

(51) International Patent Classification (IPC):  C21B 13/00(2006.01) C22B 1/242(2006.01) C22B 1/245(2006.01) C22B 1/24(2006.01) C22B 1/244(2006.01) (52) Cooperative Patent Classification (CPC): C22B 1/24; C22B 1/242; C22B 1/245; C22B 1/244; C21B 13/0066; C21B 2200/00; C21C 2200/00 (86) International application number: PCT/IB2024/062040 (87) International publication number: WO 2025/125972 (19.06.2025 Gazette 2025/25)

(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: GE KH MA MD TN (30) Priority: 13.12.2023 WO PCT/IB2023/062587 (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventors: WIENCKE, Jan-Christian 57000 Metz (FR) PERNOT, Paul 88110 Raon l'Etape (FR) ROZHKOVA, Tetiana 57470 Hombourg Haut (FR) VASCONCELOS GUIMARAES, Filipe Augusto 57155 Marly (FR) (74) Representative: Plaisant, Sophie Marie  ArcelorMittal France Research & Development Intellectual Property 6, rue André Campra 93200 Saint-Denis 93200 Saint-Denis (FR)