(19)
(11) EP 4 490 329 A1

(12)

(43) Date of publication:
15.01.2025 Bulletin 2025/03

(21) Application number: 23709721.7

(22) Date of filing: 09.03.2023
(51) International Patent Classification (IPC): 
C21D 1/18(2006.01)
C21D 8/02(2006.01)
C22C 38/02(2006.01)
C22C 38/06(2006.01)
 C21D 1/22(2006.01)
C21D 8/04(2006.01)
C22C 38/04(2006.01)
C21D 1/19(2006.01)
(52) Cooperative Patent Classification (CPC):
C22C 38/02; C22C 38/04; C22C 38/06; C21D 2211/001; C21D 2211/005; C21D 2211/008; C21D 8/0226; C21D 8/0236; C21D 8/0273; C21D 8/0473; C21D 8/0426; C21D 8/0436; C21D 1/18; C21D 1/185; C21D 1/22; C21D 1/19
(86) International application number:
PCT/EP2023/056089
(87) International publication number:
WO 2023/170245 (14.09.2023 Gazette 2023/37)
(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: 10.03.2022 EP 22161489

(71) Applicant: Tata Steel Nederland Technology B.V.
1951 JZ Velsen-Noord (NL)

(72) Inventor:
  • CHEN, Shangping
    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)

   


(54) HIGH STRENGTH STEEL SHEET WITH EXCELLENT HOLE EXPANDABILITY AND METHOD OF PRODUCING THE SAME