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(11)

EP 4 824 310 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24821601.2 (22) Date of filing: 06.12.2024

(51) International Patent Classification (IPC):  C22C 38/22(2006.01) C22C 38/28(2006.01) C22C 38/38(2006.01) C22C 38/04(2006.01) C22C 38/00(2006.01) C21D 8/02(2026.01) C21D 7/13(2006.01) C21D 1/02(2006.01) C23C 2/28(2006.01) C23C 2/02(2006.01) C22C 38/26(2006.01) C22C 38/32(2006.01) C22C 38/02(2006.01) C22C 38/06(2006.01) C21D 9/46(2006.01) C21D 6/00(2006.01) C21D 1/673(2006.01) C23C 2/12(2006.01) C23C 2/40(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/22; C22C 38/26; C22C 38/28; C22C 38/32; C22C 38/38; C22C 38/02; C22C 38/04; C22C 38/06; C22C 38/001; C21D 9/46; C21D 8/0226; C21D 8/0236; C21D 8/0273; C21D 8/0278; C21D 6/002; C21D 6/005; C21D 7/13; C21D 1/02; C21D 1/673; C23C 2/12; C23C 2/29; C23C 2/28; C23C 2/40; C23C 2/02; C21D 8/02 (86) International application number: PCT/IB2024/062298 (87) International publication number: WO 2025/126001 (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: 11.12.2023 WO PCT/IB2023/062484 (71) Applicant: ArcelorMittal 1160 Luxembourg (LU)	(72) Inventor: PHILIPPOT, Clément 57365 Ennery (FR) (74) Representative: Plaisant, Sophie Marie  ArcelorMittal France Research & Development Intellectual Property 6, rue André Campra 93200 Saint-Denis 93200 Saint-Denis (FR)