EP 3926057 A4 20220518 - HIGH-MN STEEL AND METHOD FOR MANUFACTURING SAME
Title (en)
HIGH-MN STEEL AND METHOD FOR MANUFACTURING SAME
Title (de)
STAHL MIT HOHEM MN-GEHALT UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
ACIER À HAUTE TENEUR EN MN ET PROCÉDÉ DE FABRICATION D'UN TEL ACIER
Publication
Application
Priority
- JP 2019022910 A 20190212
- JP 2020005017 W 20200210
Abstract (en)
[origin: EP3926057A1] Provided is high-Mn steel having high strength, and excellent low-temperature toughness and ductility, the high-Mn steel having a chemical composition containing, in mass%, C:0.10-0.70%, Si:0.10-0.90%, Mn:20-30%, P:0.030% or less, S:0.0070% or less, Al:0.01―0.07%, Cr:1.8―7.0%, Ni:0.01% or more and less than 1.0%, Ca:0.0005-0.010% or less, N:0.0050-0.0500%, O:0.0050% or less, Ti:0.0050% or less and Nb:0.0050% or less, satisfying Ca/S≥1.0, with the balance being Fe and inevitable impurities; a microstructure containing austenite as a matrix; a yield stress of 400MPa or more; and an average Charpy impact absorbed energy at -196°C of 100J or more for a full-sized test piece and 20J or more for a half-sized test piece.
IPC 8 full level
C22C 38/58 (2006.01); C21D 1/02 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01)
CPC (source: EP KR)
C21D 1/02 (2013.01 - EP); C21D 6/002 (2013.01 - EP); C21D 6/004 (2013.01 - EP); C21D 6/005 (2013.01 - EP); C21D 8/02 (2013.01 - EP); C21D 8/0205 (2013.01 - EP); C21D 8/021 (2013.01 - EP); C21D 8/0226 (2013.01 - EP KR); C21D 8/0247 (2013.01 - EP); C21D 8/0263 (2013.01 - EP); C21D 9/46 (2013.01 - EP); C22C 38/001 (2013.01 - EP KR); C22C 38/002 (2013.01 - EP); C22C 38/005 (2013.01 - EP); C22C 38/02 (2013.01 - EP); C22C 38/06 (2013.01 - EP); C22C 38/42 (2013.01 - EP KR); C22C 38/44 (2013.01 - EP KR); C22C 38/46 (2013.01 - EP KR); C22C 38/48 (2013.01 - EP KR); C22C 38/50 (2013.01 - EP KR); C22C 38/58 (2013.01 - EP KR); C21D 2211/001 (2013.01 - EP KR)
Citation (search report)
- [XI] JP 2017155300 A 20170907 - NIPPON STEEL & SUMITOMO METAL CORP
- [I] WO 2018199145 A1 20181101 - JFE STEEL CORP [JP]
- [A] JP 2007126715 A 20070524 - SUMITOMO METAL IND
- [A] JP 2017071817 A 20170413 - NIPPON STEEL & SUMITOMO METAL CORP
- [AD] JP 2016084529 A 20160519 - NIPPON STEEL & SUMITOMO METAL CORP
- [A] JP S60128242 A 19850709 - NIPPON STEEL CORP
- See also references of WO 2020166538A1
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
DOCDB simple family (publication)
EP 3926057 A1 20211222; EP 3926057 A4 20220518; BR 112021015919 A2 20211005; CN 113412337 A 20210917; CN 113412337 B 20231205; JP 6954475 B2 20211027; JP WO2020166538 A1 20210311; KR 102628769 B1 20240123; KR 20210113682 A 20210916; MY 194355 A 20221129; SG 11202108594Q A 20211129; TW 202037734 A 20201016; TW I754893 B 20220211; WO 2020166538 A1 20200820
DOCDB simple family (application)
EP 20756282 A 20200210; BR 112021015919 A 20200210; CN 202080013521 A 20200210; JP 2020005017 W 20200210; JP 2020533178 A 20200210; KR 20217026218 A 20200210; MY PI2021004552 A 20200210; SG 11202108594Q A 20200210; TW 109104008 A 20200210