EP 3269831 B1 20201104 - HIGH CHROMIUM MARTENSITIC HEAT-RESISTANT SEAMLESS STEEL TUBE OR PIPE WITH COMBINED HIGH CREEP RUPTURE STRENGTH AND OXIDATION RESISTANCE
Title (en)
HIGH CHROMIUM MARTENSITIC HEAT-RESISTANT SEAMLESS STEEL TUBE OR PIPE WITH COMBINED HIGH CREEP RUPTURE STRENGTH AND OXIDATION RESISTANCE
Title (de)
HOCHCHROMHALTIGES MARTENSITISCHES, HITZEBESTÄNDIGES NAHTLOSES STAHLROHR MIT KOMBINIERTER HOHER ZEITSTANDFESTIGKEIT UND OXIDATIONSBESTÄNDIGKEIT
Title (fr)
TUBE D'ACIER SANS SOUDURE THERMO-RÉSISTANT MARTENSITIQUE À HAUTE TENEUR EN CHROME À RÉSISTANCE À LA RUPTURE EN FLUAGE ÉLEVÉE ET RÉSISTANCE À L'OXYDATION COMBINÉES
Publication
Application
Priority
EP 16179114 A 20160712
Abstract (en)
[origin: EP3269831A1] Martensitic heat-resistant steel for boiler applications with a unique combination of enhanced creep strength and excellent oxidation resistance upon high temperature exposure in steam containing environments., having the following melt analysis (in wt.-%): C: 0.10 to 0.16%, Si: 0.20 to 0.60%, Mn: 0.30 to 0.80%, P ‰¤0.020%, S ‰¤0.010%, Al ‰¤0.020%, Cr: 10.5 to 12.00%, Mo: 0.10 to 0.60%, V: 0.15 to 0.30%, Ni: 0.10 to 0.40%, B: 0.008 to 0.015%, N:0.002 to 0.020%, Co: 1.50 to 3.00%, W: 1.50 to 2.50%, Nb: 0.02 to 0.07%, Ti: 0.001-0.020%. The balance of the steel consists of iron and unavoidable impurities. The steel is normalized for a period of about 10 to about 120 minutes in the temperature range between 1050 °C and 1170°C and cooled down in air or water to room temperature, and then tempered for at least one hour in the temperature range between 750°C and 820°C. It exhibits martensitic microstructure with average ´-ferrite content of less than 5 vol.-%.
IPC 8 full level
C21D 8/02 (2006.01); C21D 6/00 (2006.01); C21D 8/10 (2006.01); C21D 9/08 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/10 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/18 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01)
CPC (source: EA EP KR US)
C21D 6/002 (2013.01 - EA EP KR US); C21D 6/004 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/007 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/0226 (2013.01 - KR); C21D 8/0263 (2013.01 - KR); C21D 8/105 (2013.01 - EA EP KR US); C21D 9/08 (2013.01 - EA EP US); C21D 9/085 (2013.01 - EA EP KR US); C22C 38/001 (2013.01 - EA EP KR US); C22C 38/02 (2013.01 - EA EP KR US); C22C 38/04 (2013.01 - EA EP KR US); C22C 38/06 (2013.01 - EP US); C22C 38/105 (2013.01 - EA EP KR US); C22C 38/12 (2013.01 - EA EP KR US); C22C 38/14 (2013.01 - EA EP US); C22C 38/18 (2013.01 - EA EP US); C22C 38/44 (2013.01 - EA EP US); C22C 38/46 (2013.01 - EA EP KR US); C22C 38/48 (2013.01 - EA EP KR US); C22C 38/50 (2013.01 - EA EP KR US); C22C 38/52 (2013.01 - EA EP KR US); C22C 38/54 (2013.01 - EA EP KR US); C21D 8/0226 (2013.01 - EA EP US); C21D 8/0263 (2013.01 - EA EP US); C21D 2211/005 (2013.01 - EP US); C21D 2211/008 (2013.01 - EA EP KR US)
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3269831 A1 20180117; EP 3269831 B1 20201104; AU 2017297766 A1 20181213; AU 2017297766 B2 20230216; BR 112019000376 A2 20190424; BR 112019000376 B1 20220628; CA 3025133 A1 20180118; CN 109689901 A 20190426; EA 036004 B1 20200911; EA 201990013 A1 20190531; EP 3485046 A1 20190522; EP 3485046 B1 20201118; ES 2846875 T3 20210730; JP 2019524996 A 20190905; JP 7016343 B2 20220204; KR 102475025 B1 20221207; KR 20190029654 A 20190320; MX 2019000517 A 20190923; PL 3269831 T3 20210504; UA 124766 C2 20211117; US 2019203313 A1 20190704; WO 2018011301 A1 20180118
DOCDB simple family (application)
EP 16179114 A 20160712; AU 2017297766 A 20170712; BR 112019000376 A 20170712; CA 3025133 A 20170712; CN 201780039089 A 20170712; EA 201990013 A 20170712; EP 17743278 A 20170712; EP 2017067613 W 20170712; ES 16179114 T 20160712; JP 2019500645 A 20170712; KR 20197004185 A 20170712; MX 2019000517 A 20170712; PL 16179114 T 20160712; UA A201900275 A 20170712; US 201716314205 A 20170712