EP 4249623 A1 20230927 - HIGH-STRENGTH AUSTENITIC STAINLESS STEEL HAVING EXCELLENT HOT WORKABILITY
Title (en)
HIGH-STRENGTH AUSTENITIC STAINLESS STEEL HAVING EXCELLENT HOT WORKABILITY
Title (de)
HOCHFESTER AUSTENITISCHER ROSTFREIER STAHL MIT AUSGEZEICHNETER WARMUMFORMBARKEIT
Title (fr)
ACIER INOXYDABLE AUSTÉNITIQUE À HAUTE RÉSISTANCE PRÉSENTANT UNE EXCELLENTE APTITUDE AU FAÇONNAGE À CHAUD
Publication
Application
Priority
- KR 20200158160 A 20201123
- KR 2021015395 W 20211029
Abstract (en)
Disclosed is a high-strength austenitic stainless steel having excellent hot workability. The high-strength austenitic stainless steel having excellent hot workability according to the present disclosure includes, in percent by weight (wt%), 0.01 to 0.035% of C, 0.5% or less of Si, 0.5 to 1.5% of Mn, 17 to 22% of Cr, 6 to 11% of Ni, 1% or less of Mo, 1% or less of Cu, 0.1 to 0.22% of N, and the balance of Fe and inevitable impurities, wherein a value of Formula (1) below 1.9 or more, or a precipitation temperature of chromium nitride satisfies a value represented by Formula (2) below or less. 3×Cr+Mo+5×Si−2×Ni−Mn−70×C+N−271180+36×C+12×Mo+17×Cu+411×N−35×Mn
IPC 8 full level
C22C 38/44 (2006.01); C22C 38/42 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP KR US)
C21D 8/0226 (2013.01 - US); C21D 8/0273 (2013.01 - US); C21D 9/46 (2013.01 - US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - US); C22C 38/42 (2013.01 - EP KR US); C22C 38/44 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP KR US); C22C 38/54 (2013.01 - EP KR US); C21D 2211/001 (2013.01 - KR US)
Citation (search report)
See references of WO 2022108170A1
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 4249623 A1 20230927; CN 116547402 A 20230804; JP 2023550424 A 20231201; KR 102463015 B1 20221103; KR 20220071005 A 20220531; US 2023407443 A1 20231221; WO 2022108170 A1 20220527
DOCDB simple family (application)
EP 21894941 A 20211029; CN 202180077816 A 20211029; JP 2023530184 A 20211029; KR 20200158160 A 20201123; KR 2021015395 W 20211029; US 202118037473 A 20211029