EP 2060650 B1 20101215 - Ferritic stainless steel material for automobile exhaust gas passage components
Title (en)
Ferritic stainless steel material for automobile exhaust gas passage components
Title (de)
Ferritischer Edelstahl für Abgasleitungskomponenten eines Fahrzeuges
Title (fr)
Matériau d'acier inoxydable ferritique pour des composants de passage de gaz d'échappement automobile
Publication
Application
Priority
JP 2007294932 A 20071113
Abstract (en)
[origin: EP2060650A1] To provide a ferritic stainless steel material for automobile exhaust gas passage components usable in a high-temperature range over 900°C and even over 950°C. The ferritic stainless steel material has excellent heat resistance and low-temperature toughness and has a composition comprising, in terms of % by mass, at most 0.03 % of C, at most 1 % of Si, from 0.6 to 2 % of Mn, at most 3 % of Ni, from 10 to 25 % of Cr, from 0.3 to 0.7 % of Nb, from more than 1 to 2 % of Cu, from 1 to 2.5 % of Mo, from 1 to 2.5 % of W, at most 0.15 % of Al, from 0.03 to 0.2 % of V, and at most 0.03 % of N, and optionally containing any of B, Co, W, Ti, Zr, REM and Ca with a balance of Fe and inevitable impurities, and the composition satisfies restrictive formulae 1.2Nb + 5Mo + 6Cu ‰¥ 11.5 and 15Nb + 2Mo + 0.5Cu ‰¥ 10.5. The steel material has a texture where the total amount of Nb and Mo existing as a precipitation phase is at most 0.2 % by mass.
IPC 8 full level
C22C 38/20 (2006.01); C21D 6/00 (2006.01); C21D 6/02 (2006.01); C22C 38/00 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/48 (2006.01); C22C 38/58 (2006.01); F01N 13/16 (2010.01)
CPC (source: EP US)
C22C 38/04 (2013.01 - EP US); C22C 38/20 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/24 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); F01N 2530/04 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB
DOCDB simple family (publication)
EP 2060650 A1 20090520; EP 2060650 B1 20101215; CN 101435054 A 20090520; CN 101435054 B 20120912; DE 602008003963 D1 20110127; ES 2355171 T3 20110323; JP 2009120894 A 20090604; JP 5178157 B2 20130410; US 2009120536 A1 20090514
DOCDB simple family (application)
EP 08019006 A 20081030; CN 200810173325 A 20081113; DE 602008003963 T 20081030; ES 08019006 T 20081030; JP 2007294932 A 20071113; US 29207208 A 20081112