EP 1294956 B1 20041215 - CORROSION RESISTANT MATERIAL
Title (en)
CORROSION RESISTANT MATERIAL
Title (de)
KORROSIONSBESTÄNDIGER WERKSTOFF
Title (fr)
MATERIAU RESISTANT A LA CORROSION
Publication
Application
Priority
- AT 0100188 W 20010608
- AT 11332000 A 20000630
Abstract (en)
[origin: WO0202837A1] The invention relates to a material with high corrosion resistance in media with high chloride concentration, suitable for devices in oil-field applications. According to the invention, a paramagnetic material with high yield strength, high notched impact resistance, high fatigue resistance and a low ductile transition temperature with concomitant improved high corrosion resistance, in particular, resistance to hole corrosion can be achieved by production of a material comprising essentially the following elements in wt. %: carbon (C) less than or equal to 0.03; silicon (Si) less than or equal to 0.89; manganese (Mn) 0.51 to 4.49; chromium (Cr) 25.1 to 38.9; molybdenum (Mo) 2.1 to 5.9; nickel (Ni) 22.9 to 38.9; copper (Cu) 0.51 to 1.49; nitrogen (N) 0.17 to 0.19; iron (Fe) the remainder, along with impurities arising during production. Said material is hot-formed in a state free from nitride precipitates and other associated precipitates and, after cooling to give a ferrite-free state is cold-formed and has a permeability of less than 1.0048; a yield strength (Rp02) greater than 710 N/mm<2>; a notch impact resistance of over 60 J; a fatigue resistance of at least <u>+</u> 310 N/mm<2>, where N = 10<7> load reversals and a ductile transition temperature of below - 28 DEG C (FATT).
IPC 1-7
IPC 8 full level
C21D 8/00 (2006.01); C22C 30/00 (2006.01); C22C 38/00 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/58 (2006.01); C21D 8/06 (2006.01)
CPC (source: EP US)
C21D 8/005 (2013.01 - EP US); C22C 30/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/58 (2013.01 - EP US); C21D 8/065 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0202837 A1 20020110; AT 408889 B 20020325; AT A11332000 A 20010815; AT E284979 T1 20050115; AU 6565701 A 20020114; CA 2396207 A1 20020110; CA 2396207 C 20070814; DE 50104841 D1 20050120; EP 1294956 A1 20030326; EP 1294956 B1 20041215; ES 2231505 T3 20050516; NO 20022917 D0 20020618; NO 20022917 L 20020618; NO 330002 B1 20110207; US 2003024612 A1 20030206; US 6764647 B2 20040720
DOCDB simple family (application)
AT 0100188 W 20010608; AT 01942857 T 20010608; AT 11332000 A 20000630; AU 6565701 A 20010608; CA 2396207 A 20010608; DE 50104841 T 20010608; EP 01942857 A 20010608; ES 01942857 T 20010608; NO 20022917 A 20020618; US 18272502 A 20020812