(19)

(11)

EP 4 508 252 A1

(12)

(43) Date of publication: 19.02.2025 Bulletin 2025/08 (21) Application number: 23719670.4 (22) Date of filing: 11.04.2023

(51) International Patent Classification (IPC):  C22C 38/44(2006.01) C22C 38/46(2006.01) C22C 38/54(2006.01) C22C 38/50(2006.01) C22C 38/02(2006.01) C22C 38/06(2006.01) C21D 9/46(2006.01) C21D 8/10(2006.01) C21D 6/00(2006.01) C21D 7/02(2006.01) C22C 38/42(2006.01) C22C 38/52(2006.01) C22C 38/00(2006.01) C22C 38/48(2006.01) C22C 38/04(2006.01) C22C 38/58(2006.01) C21D 8/02(2006.01) C21D 9/08(2006.01) C21D 6/02(2006.01) C21D 7/13(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/44; C22C 38/42; C22C 38/52; C22C 38/54; C22C 38/46; C22C 38/001; C22C 38/50; C22C 38/48; C22C 38/02; C22C 38/04; C22C 38/58; C22C 38/005; C22C 38/06; C21D 6/004; C21D 6/02; C21D 1/26; C21D 1/18; C21D 7/02; C21D 7/13; C21D 9/46; C21D 9/08; C21D 8/0247; C21D 8/0273; C21D 8/105 (86) International application number: PCT/EP2023/059457 (87) International publication number: WO 2023/198720 (19.10.2023 Gazette 2023/42)

(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: 12.04.2022 EP 22168045 (71) Applicant: Alleima Tube AB 811 81 Sandviken (SE)	(72) Inventors: HÄTTESTRAND, Mats 81181 Sandviken (SE) KIVISÄKK, Ulf 81181 Sandviken (SE) (74) Representative: Setréus, Ellen  Alleima EMEA AB 811 81 Sandviken 811 81 Sandviken (SE)