EP 4098765 A4 20240424 - HIGHLY ANTICORROSIVE MARTENSITIC STAINLESS STEEL, AND MANUFACTURING METHOD THEREFOR
Title (en)
HIGHLY ANTICORROSIVE MARTENSITIC STAINLESS STEEL, AND MANUFACTURING METHOD THEREFOR
Title (de)
HOCHKORROSIONSBESTÄNDIGER MARTENSITISCHER ROSTFREIER STAHL UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ACIER INOXYDABLE MARTENSITIQUE À HAUT POUVOIR ANTI-CORROSIF ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 20200034294 A 20200320
- KR 2020014029 W 20201014
Abstract (en)
[origin: EP4098765A1] Disclosed is a highly anticorrosive martensitic stainless steel having uniformly distributed fine chromium carbide so as to have improved corrosion resistance and being applicable as tableware with suitable hardness when strengthened by heat treatment, and a manufacturing metho therefor.The highly anticorrosive martensitic stainless steel according to an embodiment of the present disclosure includes, in percent by weight (wt%), 0.14 to 0.21% of C, 0.05 to 0.11% of N, 0.1 to 0.6% of Si, 0.4 to 1.2% of Mn, 14.0 to 17.0% of Cr, 0.2 to 0.32% of C+N, and the balance of Fe and inevitable impurities, has a PREN value, represented by Formula (1), of 16 or more, and has a precipitation temperature of chromium carbide of 950°C or lower.
IPC 8 full level
C22C 38/18 (2006.01); C21D 1/18 (2006.01); C21D 1/25 (2006.01); C21D 1/26 (2006.01); C21D 1/78 (2006.01); C21D 6/00 (2006.01); C21D 6/02 (2006.01); C21D 6/04 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01)
CPC (source: EP KR US)
C21D 1/18 (2013.01 - EP US); C21D 1/25 (2013.01 - EP); C21D 1/26 (2013.01 - EP KR); C21D 1/78 (2013.01 - EP); C21D 6/002 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - US); C21D 6/02 (2013.01 - EP); C21D 6/04 (2013.01 - EP US); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0247 (2013.01 - EP); C21D 8/0263 (2013.01 - EP KR US); C21D 8/0273 (2013.01 - EP KR); C21D 9/46 (2013.01 - EP US); C22C 38/001 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/18 (2013.01 - EP); C22C 38/22 (2013.01 - KR US); C21D 2211/004 (2013.01 - EP); C21D 2211/005 (2013.01 - EP); C21D 2211/008 (2013.01 - EP US)
Citation (search report)
- [XA] JP 2008163452 A 20080717 - NIPPON STEEL & SUMIKIN SST
- [IA] EP 1541702 A1 20050615 - POSCO [KR]
- [A] JP 2009203528 A 20090910 - NIPPON STEEL & SUMIKIN SST
- [A] EP 0994199 A1 20000419 - SUMITOMO METAL IND [JP], et al
- [A] CN 101372734 A 20090225 - BAOSTEEL GROUP CORP [CN]
- [A] JP H1150203 A 19990223 - NIPPON STEEL CORP
- See also references of WO 2021187706A1
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 4098765 A1 20221207; EP 4098765 A4 20240424; CA 3171590 A1 20210923; CN 115667569 A 20230131; JP 2023517590 A 20230426; KR 102326693 B1 20211117; KR 20210117712 A 20210929; US 2023107193 A1 20230406; WO 2021187706 A1 20210923
DOCDB simple family (application)
EP 20925160 A 20201014; CA 3171590 A 20201014; CN 202080098335 A 20201014; JP 2022554348 A 20201014; KR 20200034294 A 20200320; KR 2020014029 W 20201014; US 202017908124 A 20201014