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EP 4 816 565 A1

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(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24827877.2 (22) Date of filing: 27.11.2024

(51) International Patent Classification (IPC):  C21D 1/34(2006.01) C21D 9/573(2006.01) C21D 1/613(2006.01) F27B 9/02(2006.01) F27B 9/28(2006.01) F27D 9/00(2006.01) F15B 1/00(2006.01) F17D 1/00(2006.01) F24H 15/335(2022.01) F28F 5/02(2006.01) C21D 1/62(2006.01) C21D 11/00(2006.01) C21D 1/667(2006.01) F27B 9/24(2006.01) F27B 9/40(2006.01) F27D 19/00(2006.01) F17C 1/00(2006.01) F25D 17/00(2006.01) F28D 20/00(2006.01) (52) Cooperative Patent Classification (CPC): C21D 1/34; C21D 1/62; C21D 9/5737; C21D 11/005; C21D 11/00; F27B 9/28; F27B 9/028; F27B 9/40; F27D 19/00; F27B 9/2469; F27D 9/00; C21D 1/667; C21D 1/613 (86) International application number: PCT/IB2024/061929 (87) International publication number: WO 2025/114910 (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: 29.11.2023 IT 202300025422 (71) Applicant: Danieli & C. Officine Meccaniche S.p.A. 33042 Buttrio (IT)	(72) Inventors: VIGNOLO, Luciano 33042 Buttrio (IT) GAGLIARDI, Nicola 33042 Buttrio (IT) RICCI, Matteo Giacomo 33042 Buttrio (IT) (74) Representative: Celona, Antonio et al Notarbartolo & Gervasi S.p.A. Viale Achille Papa, 30 20149 Milano 20149 Milano (IT)