(19)

(11)

EP 4 816 575 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24812593.2 (22) Date of filing: 25.11.2024

(51) International Patent Classification (IPC):  C22C 38/04(2006.01) C22C 38/14(2006.01) C22C 38/06(2006.01) C22C 38/48(2006.01) C22C 38/54(2006.01) C21D 9/46(2006.01) C21D 8/02(2026.01) C21D 1/673(2006.01) C21D 1/18(2006.01) B21D 22/02(2006.01) C22C 38/02(2006.01) C22C 38/00(2006.01) C22C 38/22(2006.01) C22C 38/50(2006.01) C22C 38/42(2006.01) C21D 7/13(2006.01) C21D 6/00(2006.01) C21D 1/02(2006.01) B32B 15/01(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/04; C22C 38/02; C22C 38/14; C22C 38/002; C22C 38/06; C22C 38/38; C22C 38/22; C22C 38/26; C22C 38/28; C22C 38/32; C22C 38/20; C22C 38/001; C22C 38/44; C22C 38/48; C22C 38/50; C22C 38/54; C22C 38/42; C21D 9/46; C21D 8/0226; C21D 8/0236; C21D 8/0247; C21D 8/0263; C21D 8/0278; C21D 6/005; C21D 6/002; C21D 7/13; C21D 1/673; C21D 1/02; C21D 1/18; B32B 15/012; B32B 15/013; B21D 22/022; C21D 2211/008; C21D 8/02 (86) International application number: PCT/IB2024/061788 (87) International publication number: WO 2025/114857 (05.06.2025 Gazette 2025/23)

(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: 28.11.2023 WO PCT/IB2023/061952 (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)