EP 3872210 A4 20210901 - CRYOGENIC AUSTENITIC HIGH-MANGANESE STEEL HAVING EXCELLENT SHAPE, AND MANUFACTURING METHOD THEREFOR
Title (en)
CRYOGENIC AUSTENITIC HIGH-MANGANESE STEEL HAVING EXCELLENT SHAPE, AND MANUFACTURING METHOD THEREFOR
Title (de)
KRYOGENER AUSTENITISCHER MANGANREICHER STAHL MIT AUSGEZEICHNETER FORM UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ACIER AUSTÉNITIQUE CRYOGÉNIQUE À HAUTE TENEUR EN MANGANÈSE AYANT UNE FORME EXCELLENTE, ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 20180128504 A 20181025
- KR 20190118924 A 20190926
- KR 2019014188 W 20191025
Abstract (en)
[origin: EP3872216A1] The cryogenic austenitic high-manganese steel having an excellent shape, according to one aspect of the present invention, comprises 0.2-0.5 wt% of C, 23-28 wt% of Mn, 0.05-0.5 wt% of Si, 1 wt% or less (but not 0 wt%) of Cu, 0.03 wt% or less of P, 0.005 wt% or less of S, 0.5 wt% or less of Al, 2.5-4.5 wt% of Cr, and 0.0005-0.01 wt% of B, with the remainder being Fe and other unavoidable impurities, and also comprises at least 95 area% of austenite as a microstructure, wherein the Charpy impact toughness at - 196°C is least 30 J (based on a thickness of 5 mm), and the maximum difference in height between a crest and a trough formed within an area of 2 m along the direction of rolling may be at most 10 mm.
IPC 8 full level
C22C 38/38 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/32 (2006.01)
CPC (source: EP KR)
C21D 1/02 (2013.01 - EP); C21D 6/00 (2013.01 - EP); C21D 6/002 (2013.01 - EP); C21D 6/005 (2013.01 - EP); C21D 8/02 (2013.01 - EP); C21D 8/0205 (2013.01 - EP); C21D 8/0226 (2013.01 - EP KR); C21D 8/0231 (2013.01 - EP); C21D 8/0263 (2013.01 - EP KR); C21D 9/46 (2013.01 - EP); C22C 38/02 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP KR); C22C 38/20 (2013.01 - EP KR); C22C 38/32 (2013.01 - EP KR); C22C 38/38 (2013.01 - EP KR); C21D 2211/001 (2013.01 - EP KR)
Citation (search report)
- [I] JP 2007126715 A 20070524 - SUMITOMO METAL IND
- [A] WO 2017111510 A1 20170629 - POSCO [KR]
- [A] WO 2018117712 A1 20180628 - POSCO [KR]
- [A] CN 107881432 A 20180406 - WUYANG IRON & STEEL CO LTD, et al
- [A] CN 108570541 A 20180925 - UNIV NORTHEASTERN
- [A] CN 107177786 A 20170919 - UNIV NORTHEASTERN
- [A] CN 107620010 A 20180123 - WUYANG IRON & STEEL CO LTD
- [A] KR 20180074450 A 20180703 - POSCO [KR]
- See references of WO 2020085858A1
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)
EP 3872216 A1 20210901; EP 3872216 A4 20210901; CN 112912529 A 20210604; CN 112930415 A 20210608; EP 3872210 A1 20210901; EP 3872210 A4 20210901; KR 102255825 B1 20210526; KR 102255826 B1 20210526; KR 20200047317 A 20200507; KR 20200047318 A 20200507
DOCDB simple family (application)
EP 19876795 A 20191025; CN 201980068654 A 20191025; CN 201980069717 A 20191025; EP 19875536 A 20191025; KR 20190118924 A 20190926; KR 20190118925 A 20190926