(19)

(11)

EP 4 437 145 A2

(12)

(88) Date of publication A3: 14.09.2023 (43) Date of publication: 02.10.2024 Bulletin 2024/40 (21) Application number: 22840524.7 (22) Date of filing: 23.11.2022

(51) International Patent Classification (IPC):  C21D 1/18(2006.01) C21D 1/26(2006.01) C21D 6/02(2006.01) C21D 9/46(2006.01) C22C 38/02(2006.01) C22C 38/06(2006.01) C22C 38/44(2006.01) C22C 38/48(2006.01) C22C 38/58(2006.01) C22C 38/14(2006.01) C21D 1/25(2006.01) C21D 1/02(2006.01) C21D 8/02(2006.01) C22C 38/00(2006.01) C22C 38/04(2006.01) C22C 38/42(2006.01) C22C 38/46(2006.01) C22C 38/50(2006.01) C22C 38/12(2006.01) C21D 1/19(2006.01) (52) Cooperative Patent Classification (CPC): C21D 1/18; C21D 1/25; C21D 1/26; C21D 1/02; C21D 6/02; C21D 8/021; C21D 8/0263; C21D 9/46; C21D 2211/002; C21D 2211/004; C21D 2211/005; C22C 38/001; C22C 38/02; C22C 38/04; C22C 38/06; C22C 38/42; C22C 38/44; C22C 38/50; C22C 38/48; C22C 38/46; C22C 38/58; C22C 38/12; C22C 38/14; C21D 8/0226; C21D 1/19 (86) International application number: PCT/US2022/080444 (87) International publication number: WO 2023/097287 (01.06.2023 Gazette 2023/22)

(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: 24.11.2021 US 202163283090 P (71) Applicant: United States Steel Corporation Pittsburgh, PA 15219-2800 (US)	(72) Inventor: MERWIN, Matthew J. Sewickley, PA 15143 (US) (74) Representative: Richards, John  Ladas & Parry LLP Temple Chambers 3-7 Temple Avenue London EC4Y 0DA Temple Chambers 3-7 Temple Avenue London EC4Y 0DA (GB)