EP 2157202 B1 20170712 - FERRITE HEAT RESISTANT STEEL
Title (en)
FERRITE HEAT RESISTANT STEEL
Title (de)
HITZEBESTÄNDIGER FERRITSTAHL
Title (fr)
ACIER FERRITE RÉSISTANT À LA CHALEUR
Publication
Application
Priority
- JP 2008059630 W 20080526
- JP 2007148063 A 20070604
- JP 2008035788 A 20080218
Abstract (en)
[origin: EP2157202A1] There is provided a heat resistant ferritic steel, excellent in the weld crack resistance of the HAZ and creep strength. A high-Cr heat resistant ferritic steel is characterized by consisting of, by mass%, Si: more than 0.1% and not more than 1.0%, Mn: 2.0% or less, Co: 1 to 8%, Cr: 7 to 13%, V: 0.05 to 0.4%, Nb: 0.01 to 0.09%, either one or both of Mo and W: 0.5 to 4% as a total, B: 0.005 to 0.025%, Al: 0.03% or less, and N: 0.003 to 0.06%, and containing C in an amount satisfying Expression (1), the balance being Fe and impurities, and O, P and S as impurities being such that O: 0.02% or less, P: 0.03% or less, and S: 0.02% or less, respectively, 0.005 ‰¤ C ‰¤ - 5 / 3 × B + 0.085 in which C and B represent the content of each element (mass%). Furthermore, the high-Cr heat resistant ferritic steel may contain one or more kinds selected from the group consisting of Nd, Ta, Ca and Mg.
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/38 (2006.01)
CPC (source: EP KR US)
C22C 38/001 (2013.01 - EP KR US); C22C 38/005 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP KR US); C22C 38/22 (2013.01 - EP KR US); C22C 38/24 (2013.01 - EP KR US); C22C 38/26 (2013.01 - EP KR US); C22C 38/30 (2013.01 - EP KR US); C22C 38/32 (2013.01 - EP KR US); C22C 38/38 (2013.01 - KR)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2157202 A1 20100224; EP 2157202 A4 20110914; EP 2157202 B1 20170712; CN 101680065 A 20100324; CN 101680065 B 20111116; JP 5206676 B2 20130612; JP WO2008149703 A1 20100826; KR 20090130334 A 20091222; US 2010086430 A1 20100408; WO 2008149703 A1 20081211
DOCDB simple family (application)
EP 08764663 A 20080526; CN 200880018980 A 20080526; JP 2008059630 W 20080526; JP 2009517797 A 20080526; KR 20097024825 A 20080526; US 63130709 A 20091204