(19)

(11)

EP 4 824 308 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24821598.0 (22) Date of filing: 04.12.2024

(51) International Patent Classification (IPC):  C22C 38/02(2006.01) C22C 38/60(2006.01) C22C 38/06(2006.01) C22C 38/34(2006.01) C22C 38/54(2006.01) C22C 38/44(2006.01) C21D 9/00(2006.01) C21D 6/00(2006.01) C21D 1/18(2006.01) C22C 38/04(2006.01) C22C 38/14(2006.01) C22C 38/00(2006.01) C22C 38/50(2006.01) C22C 38/42(2006.01) C21D 9/22(2006.01) C21D 8/00(2006.01) C21D 1/26(2006.01) C21D 7/13(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/02; C22C 38/04; C22C 38/14; C22C 38/06; C22C 38/001; C22C 38/002; C22C 38/60; C22C 38/34; C22C 38/50; C22C 38/54; C22C 38/42; C22C 38/44; C21D 9/0075; C21D 9/22; C21D 6/008; C21D 1/18; C21D 7/13; C21D 1/26; C21D 8/00 (86) International application number: PCT/IB2024/062191 (87) International publication number: WO 2025/125982 (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: 15.12.2023 WO PCT/IB2023/062782 (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventors: FORGEOUX, Didier 57283 Maizières-Les-Metz (FR) DESAIGUES, Jean-Edouard 57283 Maizières-Les-Metz (FR) LHUILLERY, Mathieu 57283 Maizières-Les-Metz (FR) (74) Representative: Plaisant, Sophie Marie  ArcelorMittal France Research & Development Intellectual Property 6, rue André Campra 93200 Saint-Denis 93200 Saint-Denis (FR)