EP 4397781 A1 20240710 - HOT-ROLLED FERRITIC STAINLESS STEEL SHEET HAVING EXCELLENT FORMABILITY AND METHOD FOR MANUFACTURING SAME

Title (en)

HOT-ROLLED FERRITIC STAINLESS STEEL SHEET HAVING EXCELLENT FORMABILITY AND METHOD FOR MANUFACTURING SAME

Title (de)

WARMGEWALZTES FERRITISCHES EDELSTAHLBLECH MIT HERVORRAGENDER FORMBARKEIT UND VERFAHREN ZUR HERSTELLUNG DAVON

Title (fr)

FEUILLE D'ACIER INOXYDABLE FERRITIQUE LAMINÉE À CHAUD PRÉSENTANT UNE EXCELLENTE APTITUDE AU FORMAGE ET PROCÉDÉ ASSOCIÉ DE FABRICATION

Publication

EP 4397781 A1 20240710 (EN)

Application

EP 22887587 A 20221026

Priority

KR 20210143703 A 20211026
KR 2022016420 W 20221026

Abstract (en)

The present invention pertains to a hot-rolled ferritic stainless steel sheet having excellent formability, which has an R-bar value of at least 1.08 and satisfies TS/YS ≤ 1.5 representing the ratio of tensile strength (TS) to yield strength (YS) after a steel, containing 0.001-0.1% of C, 10.0-14.0% of Cr, 0.001-0.5% of Ti, 0.001-0.5% of Nb, 0.001-1.5% of Ni, 0.001-1.5% of Mn, 0.001-1.0% of Cu, 0.001-2.0% of Si, 0.001-0.1% of N, and 0.1% or less of Al, with the remainder comprising Fe and inevitable impurities, is hot-rolled and then pre-rolled at a reduction ratio of 30% or more.

IPC 8 full level

C22C 38/50 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/42 (2006.01); C22C 38/48 (2006.01)

CPC (source: EP KR)

C21D 8/02 (2013.01 - EP); C21D 8/0226 (2013.01 - KR); C21D 8/0273 (2013.01 - KR); C21D 9/46 (2013.01 - EP KR); C22C 38/00 (2013.01 - EP); C22C 38/001 (2013.01 - KR); C22C 38/42 (2013.01 - EP KR); C22C 38/48 (2013.01 - EP KR); C22C 38/50 (2013.01 - EP KR); C21D 2211/005 (2013.01 - KR)

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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

EP 4397781 A1 20240710; CN 118159681 A 20240607; KR 20230059478 A 20230503; WO 2023075391 A1 20230504

DOCDB simple family (application)

EP 22887587 A 20221026; CN 202280072128 A 20221026; KR 20210143703 A 20211026; KR 2022016420 W 20221026