EP 2307586 B1 20181010 - STEEL ALLOY FOR FERRITIC STEEL HAVING EXCELLENT CREEP STRENGTH AND OXIDATION RESISTANCE AT ELEVATED USAGE TEMPERATURES
Title (en)
STEEL ALLOY FOR FERRITIC STEEL HAVING EXCELLENT CREEP STRENGTH AND OXIDATION RESISTANCE AT ELEVATED USAGE TEMPERATURES
Title (de)
STAHLLEGIERUNG FÜR EINEN FERRITISCHEN STAHL MIT AUSGEZEICHNETER ZEITSTANDFESTIGKEIT UND OXIDATIONSBESTÄNDIGKEIT BEI ERHÖHTEN EINSATZTEMPERATUREN
Title (fr)
ALLIAGE D'ACIER POUR UN ACIER FERRITIQUE PRÉSENTANT UNE EXCELLENTE RÉSISTANCE AU FLUAGE ET UNE EXCELLENTE RÉSISTANCE À L'OXYDATION À DES TEMPÉRATURES D'UTILISATION ACCRUES
Publication
Application
Priority
- DE 2009000953 W 20090703
- DE 102008034817 A 20080723
- DE 102009031576 A 20090630
Abstract (en)
[origin: WO2010009700A1] The invention relates to a steel alloy for steel that is ferritic at the usage temperature, having excellent creep strength and corrosion resistance, particularly at usage temperatures = 750ºC, having the following chemical composition (in wt. %): C = 1.0%; Si = 1.0%; Mn = 1.0%; P max. 0.05%; S max. 0.01%; 2 = Al = 12%; 3 = Cr < 16%; 2 = Ni = 10% and/or 2 = CO = 10%, where 2 = NI+Co = [%Cr] + 2,07x[%Al] >= 0.95x([%Ni] + [%Co]); N max. 0.0200%; the remainder being iron with steel production-related impurities, with the optional addition of one or more elements of V, Ti, Ta, Zr and Nb; with the optional addition of one or both elements of Mo and W; with the optional addition of one or more elements of Hf, B, Se, Y, Te, Sb, La and Zr in the range of a cumulative content of < 0.1%, with the proviso that the steel structure comprises uniformly distributed coherent precipitations based on a chromium-stabilized (Ni, Co)Al-B2 intermetallic order phase.
IPC 8 full level
C22C 38/06 (2006.01); C22C 38/40 (2006.01); C22C 38/52 (2006.01)
CPC (source: EP US)
C22C 38/06 (2013.01 - EP US); C22C 38/40 (2013.01 - EP US); C22C 38/52 (2013.01 - EP US); Y10T 428/12014 (2015.01 - EP US)
Citation (examination)
SPIEKERMANN P: "Legierungen - ein besonderes patentrechtliches Problem?", MITTEILUNGEN DER DEUTSCHEN PATENTANWAELTE, HEYMANN, KOLN, DE, vol. 34, 1 January 1993 (1993-01-01), pages 178 - 190, XP002152326, ISSN: 0026-6884
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 MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
WO 2010009700 A1 20100128; AR 072594 A1 20100908; CN 102137948 A 20110727; CN 102137948 B 20140611; DE 102009031576 A1 20100325; EP 2307586 A1 20110413; EP 2307586 B1 20181010; JP 2011528752 A 20111124; JP 5844150 B2 20160113; US 2011189496 A1 20110804; US 9080230 B2 20150714
DOCDB simple family (application)
DE 2009000953 W 20090703; AR P090102788 A 20090722; CN 200980128791 A 20090703; DE 102009031576 A 20090630; EP 09775941 A 20090703; JP 2011519034 A 20090703; US 200913055345 A 20090703