EP 4343014 A1 20240327 - AUSTENITIC STAINLESS STEEL AND MANUFACTURING METHOD THEREOF
Title (en)
AUSTENITIC STAINLESS STEEL AND MANUFACTURING METHOD THEREOF
Title (de)
AUSTENITISCHER EDELSTAHL UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ACIER INOXYDABLE AUSTÉNITIQUE ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 20210088182 A 20210706
- KR 2022008142 W 20220609
Abstract (en)
Disclosed are a ultrafine austenitic stainless steel simultaneously satisfying a high strength, a high elongation, and a high yield ratio and a method for manufacturing the same. An austenitic stainless steel according to an embodiment of the present disclosure includes, in percent by weight (wt%), 0.005 to 0.03% of carbon (C), 0.1 to 1.0% of silicon (Si), 0.1 to 2.0% of manganese (Mn), 6.0 to 12.0% of nickel (Ni), 16.0 to 20.0% of chromium (Cr), 0.01 to 0.2% of nitrogen (N), 0.25% or less of niobium (Nb), and the balance of iron (Fe) and inevitable impurities, wherein a thickness central region has an average grain size d of 5 µm or less, and a fraction of a unrecrystallized area in a band form is 10% or less.
IPC 8 full level
C22C 38/58 (2006.01); C21D 8/02 (2006.01); C22C 38/00 (2006.01); C22C 38/48 (2006.01)
CPC (source: EP KR)
C21D 6/004 (2013.01 - EP); C21D 8/0205 (2013.01 - EP); C21D 8/0226 (2013.01 - EP KR); C21D 8/0236 (2013.01 - EP KR); C21D 8/0263 (2013.01 - EP); C21D 8/0273 (2013.01 - EP KR); C21D 9/46 (2013.01 - EP); C22C 38/001 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/40 (2013.01 - EP); C22C 38/42 (2013.01 - EP); C22C 38/44 (2013.01 - EP); C22C 38/46 (2013.01 - EP); C22C 38/48 (2013.01 - EP KR); C22C 38/58 (2013.01 - EP KR); C21D 2211/001 (2013.01 - EP 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 MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4343014 A1 20240327; CN 117642522 A 20240301; KR 20230007619 A 20230113; WO 2023282477 A1 20230112
DOCDB simple family (application)
EP 22837831 A 20220609; CN 202280048016 A 20220609; KR 20210088182 A 20210706; KR 2022008142 W 20220609