EP 2036994 B1 20120104 - Cr-CONTAINING STEEL EXCELLENT IN THERMAL FATIGUE CHARACTERISTICS
Title (en)
Cr-CONTAINING STEEL EXCELLENT IN THERMAL FATIGUE CHARACTERISTICS
Title (de)
CR-HALTIGER STAHL MIT HERVORRAGENDEN WÄRMEERMÜDUNGSEIGENSCHAFTEN
Title (fr)
ACIER AU CHROME PRÉSENTANT UNE EXCELLENTE RÉSISTANCE À LA FATIGUE THERMIQUE
Publication
Application
Priority
- JP 2007063185 W 20070625
- JP 2006184028 A 20060704
- JP 2006306078 A 20061113
- JP 2007141481 A 20070529
Abstract (en)
[origin: EP2036994A1] The present invention provides Cr-containing steel superior in heat fatigue characteristics, that is, Cr-containing steel superior in heat fatigue characteristics, characterized by containing, by mass%, C: 0.01% or less, N: 0.015% or less, Si: 0.8 to 1.0%, Mn: 0.2 to 1.5%, P: 0.03% or less, S: 0.01% or less, Ni: 0.2% or less, Cu: 0.2% or less, Cr: 13 to 15%, Mo: 0.1% or less, Nb: 0.3 to 0.5%, Ti: 0.05 to 0.2%, V: 0.01 to 0.2%, Al: 0.015 to 1.0%, and B: 0.0002 to 0.0010%, satisfying (Nb+1.9×Ti)/(C+N)‰¤50, and having a balance of Fe and unavoidable impurities, wherein a 0.2% yield strength at 800°C after aging at 800°C for 100 hours or more is 20 MPa or more and a drawability value at 200°C is 35% or more and wherein a soluble Nb amount+soluble Ti amount after aging at 800°C for 100 hours or more is 0.08% or more.
IPC 8 full level
C22C 38/00 (2006.01); C21D 9/46 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP KR US)
C21D 6/002 (2013.01 - EP KR US); C21D 9/08 (2013.01 - KR); C21D 9/46 (2013.01 - EP US); C22C 38/004 (2013.01 - EP US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/24 (2013.01 - EP KR US); C22C 38/26 (2013.01 - EP KR US); C22C 38/28 (2013.01 - EP KR US); C22C 38/32 (2013.01 - EP KR US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); F01N 13/16 (2013.01 - KR); C21D 9/08 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP KR US); F01N 13/16 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
EP 2036994 A1 20090318; EP 2036994 A4 20110420; EP 2036994 B1 20120104; CN 101346487 A 20090114; CN 101346487 B 20120704; JP 2008144263 A 20080626; JP 5208450 B2 20130612; KR 20080038218 A 20080502; US 2010218856 A1 20100902; WO 2008004506 A1 20080110
DOCDB simple family (application)
EP 07767965 A 20070625; CN 200780000960 A 20070625; JP 2007063185 W 20070625; JP 2007141481 A 20070529; KR 20087006108 A 20080313; US 99187307 A 20070625