(19)
(11) EP 3 408 418 A1

(12)

(43) Date of publication:
05.12.2018 Bulletin 2018/49

(21) Application number: 17740800.2

(22) Date of filing: 10.05.2017
(51) International Patent Classification (IPC): 
C21D 8/02(2006.01)
C21D 1/18(2006.01)
C22C 38/12(2006.01)
 C21D 9/34(2006.01)
C22C 38/04(2006.01)
C22C 38/18(2006.01)
(86) International application number:
PCT/IN2017/050171
(87) International publication number:
WO 2018/146695 (16.08.2018 Gazette 2018/33)
(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:
MA MD

(30) Priority: 10.02.2017 IN 201731004831

(71) Applicant: Tata Steel Limited
Jamshedpur 831001 (IN)

(72) Inventors:
  • CHINTHA, Appa Rao
    Jamshedpur 831 001 (IN)
  • KUNDU, Saurabh
    Jamshedpur 831 001 (IN)
  • PATHAK, Prashant
    Jamshedpur 831 001 (IN)
  • GIRI, Sushil Kumar
    Jamshedpur 831 001 (IN)
  • MONIA, Soumendu
    Jamshedpur 831 001 (IN)
  • BAKSHI, Subhankar Das
    Jamshedpur 831 001 (IN)
  • KUMAR, G Senthil
    Jamshedpur 831 001 (IN)
  • MAHASHABDE, Vinay V.
    Jamshedpur 831 001 (IN)

(74) Representative: Green, Mark Charles 
Urquhart-Dykes & Lord LLP Euston House 24 Eversholt Street
London NW1 1AD
London NW1 1AD (GB)

   


(54) A HOT ROLLED PRECIPITATION STRENGTHENED AND GRAIN REFINED HIGH STRENGTH DUAL PHASE STEEL SHEET POSSESSING 600 MPA MINIMUM TENSILE STRENGTH AND A PROCESS THEREOF