(19)

(11)

EP 3 790 999 A1

(12)

(43) Date of publication: 17.03.2021 Bulletin 2021/11 (21) Application number: 19721631.0 (22) Date of filing: 07.05.2019

(51) International Patent Classification (IPC):  C21D 8/02(2006.01) C22C 38/12(2006.01) C22C 38/02(2006.01) B21B 37/26(2006.01) C22C 38/14(2006.01) C22C 38/04(2006.01) (86) International application number: PCT/EP2019/061654 (87) International publication number: WO 2019/215131 (14.11.2019 Gazette 2019/46)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 08.05.2018 EP 18171333 (71) Applicant: Tata Steel IJmuiden B.V. 1951 JZ Velsen-Noord (NL)	(72) Inventor: RIJKENBERG, Rolf Arjan 1970 CA IJmuiden (NL) (74) Representative: Group Intellectual Property Services  c/o Tata Steel Nederland Technology B.V. P.O. Box 10000 - 3G.37 1970 CA IJmuiden 1970 CA IJmuiden (NL)