EP 2025770 A1 20090218 - Ni-reduced austenite stainless steel
Title (en)
Ni-reduced austenite stainless steel
Title (de)
Austenitischer Edelstahl mit reduziertem Nickelanteil
Title (fr)
Acier inoxydable austénitique à teneur réduite en Ni
Publication
Application
Priority
JP 2007207482 A 20070809
Abstract (en)
Provided is an Ni-reduced austenite stainless steel having excellent recyclability with no problem of producibility depression to be caused by the surface property thereof and having good workability, season cracking resistance, corrosion resistance and stress corrosion cracking resistance in point of the material characteristics thereof. The steel comprises C in an amount of more than 0.05 % (by mass) and within a range of from 0.15 to 0.3 % as (C+N), Si in an amount of at most 1 %, Mn in an amount of from 0.5 to 2.5 %, Ni in an amount of from 3 to 6 %, Cr in an amount of from more than 16 to 25 % and Cu in an amount of from 0.8 to 4 %, and has Md30 of the following formula (1) of from -50 to 10 and SFE of the following formula (2) of at least 5: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ Md30 = 551-462(C+N)-9.2Si-8.1Mn-29(Ni+Cu)-13.7Cr€ƒ€ƒ€ƒ€ƒ€ƒ(1), €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ SFE = 2.2Ni+6Cu-1.1Cr-13Si-1.2Mn+32€ƒ€ƒ€ƒ€ƒ€ƒ(2).
IPC 8 full level
C22C 38/00 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/42 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR US)
C22C 38/001 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/42 (2013.01 - EP KR US); C22C 38/58 (2013.01 - EP KR US)
Citation (applicant)
- JP H0229048 B2 19900627
- JP H06271995 A 19940927 - NIPPON STEEL CORP
- JP 2006219751 A 20060824 - NISSHIN STEEL CO LTD
- JP 2006219743 A 20060824 - NISSHIN STEEL CO LTD
- JP 2006111932 A 20060427 - NISSHIN STEEL CO LTD
- JP H0686645 B2 19941102
- JP S6033186 B2 19850801
- JP 2005154890 A 20050616 - NIPPON STEEL & SUMIKIN SST
Citation (search report)
- [X] JP H01165750 A 19890629 - KAWASAKI STEEL CO
- [DX] GB 2071147 A 19810916 - ARMCO INC
- [X] US 3282684 A 19661101 - ALLEN PAUL M
- [X] CH 277069 A 19510815 - ARMCO INTERNATIONAL CORP [US]
- [A] EP 1156125 A2 20011121 - NISSHIN STEEL CO LTD [JP]
- [A] EP 1249513 A1 20021016 - NISSHIN STEEL CO LTD [JP]
- [A] JP H08120419 A 19960514 - NISSHIN STEEL CO LTD
- [A] JP H09263905 A 19971007 - NISSHIN STEEL CO LTD
- [A] JP H02305940 A 19901219 - NIPPON STEEL CORP
Designated contracting state (EPC)
DE FR GB
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
EP 2025770 A1 20090218; CN 101363103 A 20090211; JP 2009041072 A 20090226; JP 5014915 B2 20120829; KR 20090015817 A 20090212; TW 200923106 A 20090601; TW I394847 B 20130501; US 2009041613 A1 20090212
DOCDB simple family (application)
EP 08014087 A 20080806; CN 200810145647 A 20080807; JP 2007207482 A 20070809; KR 20080073032 A 20080725; TW 97129188 A 20080801; US 22220108 A 20080805