EP 1156125 B1 20060830 - Austenitic stainless steel excellent in fine blankability
Title (en)
Austenitic stainless steel excellent in fine blankability
Title (de)
Rostfreier austenitischer Stahl mit ausgezeichneter Stanzbarkeit
Title (fr)
Acier inoxydable austénitique avec une facilité de poinçonnage excellente
Publication
Application
Priority
JP 2000142644 A 20000516
Abstract (en)
[origin: EP1156125A2] The newly proposed austenitic stainless steel has composition consisting of (C+1/2N) up to 0.060 mass %, Si up to 1.0 mass %, Mn up to 5 mass %, S up to 0.006 mass %, 15-20 mass % Cr, 5-12 mass % Ni, Cu up to 5 mass %, 0-3.0 mass % Mo and the balance being Fe except inevitable impurities under the condition that a value Md30 (representing a ratio of a strain-induced martensite) defined by the under-mentioned formula is controlled within a range of -60 to -10. Hardness increase of the steel sheet after being cold-rolled is preferably 20% or more as Vickers hardness. A metallurgical structure of the steel sheet is preferably adjusted to grain size number of #8 to #11 in a finish annealed state. The steel sheet is blanked with high dimensional accuracy, and a die life is also prolonged. <DF>Md30=551-462(C+N)-9.2Si-29(Ni+Cu)-8.1Mn-13.7Cr-18.5Mo </DF>
IPC 8 full level
C21D 6/00 (2006.01); C21D 8/02 (2006.01); C22C 38/00 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/58 (2006.01); C22C 38/60 (2006.01); C21D 8/04 (2006.01)
CPC (source: EP KR US)
C21D 8/0205 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/58 (2013.01 - KR); C21D 8/0405 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR IT SE
DOCDB simple family (publication)
EP 1156125 A2 20011121; EP 1156125 A3 20020130; EP 1156125 B1 20060830; CN 1145713 C 20040414; CN 1327078 A 20011219; DE 60122618 D1 20061012; DE 60122618 T2 20070927; ES 2270918 T3 20070416; JP 2001323342 A 20011122; JP 3691341 B2 20050907; KR 100421511 B1 20040309; KR 20010105193 A 20011128; MY 146900 A 20121015; SG 108254 A1 20050128; TW 500811 B 20020901; US 2002015655 A1 20020207
DOCDB simple family (application)
EP 01110998 A 20010507; CN 01116097 A 20010516; DE 60122618 T 20010507; ES 01110998 T 20010507; JP 2000142644 A 20000516; KR 20010026388 A 20010515; MY PI20012134 A 20010508; SG 200102866 A 20010514; TW 90111646 A 20010515; US 85573601 A 20010515