Title (en)

VARIABLY ROLLED STEEL STRIP, SHEET OR BLANK AND PRODUCTION METHOD THEREFOR

Title (de)

VARIABEL GEWALZTES STAHLBAND, -BLECH ODER -ROHLING UND VERFAHREN ZU DESSEN HERSTELLUNG

Title (fr)

BANDE, TÔLE OU ÉBAUCHE D'ACIER LAMINÉES DE MANIÈRE VARIABLE ET LEUR PROCÉDÉ DE PRODUCTION

Publication

EP 3790999 A1 20210317 (EN)

Application

EP 19721631 A 20190507

Priority

• EP 18171333 A 20180508
• EP 2019061654 W 20190507

Abstract (en)

[origin: WO2019215131A1] The invention relates to a variably rolled steel strip, sheet or blank, having at least one portion having a high thickness and at least one portion having a low thickness, wherein the variation in thickness between the high thickness and the low thickness is at least 35%, and wherein in the portion with high thickness the yield strength is 350 MPa or higher and the tensile elongation A50 (in %) and sheet thickness t (in mm) satisfy the equation of A50 / t0.2 ≥ 14, and in the portion with low thickness the yield strength is 450 MPa or higher and the tensile elongation A50 (in %) and sheet thickness t (in mm) satisfy the equation A50 / t0.2 ≥ 17.

IPC 8 full level

C21D 8/02 (2006.01); B21B 37/26 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01)

CPC (source: EP)

C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0273 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C21D 2211/004 (2013.01); C21D 2211/005 (2013.01)

Citation (search report)

See references of WO 2019215131A1

Designated contracting state (EPC)

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 state (EPC)

BA ME

DOCDB simple family (publication)

WO 2019215131 A1 20191114; CN 112292468 A 20210129; EP 3790999 A1 20210317; EP 3790999 B1 20230809

DOCDB simple family (application)

EP 2019061654 W 20190507; CN 201980022577 A 20190507; EP 19721631 A 20190507