EP 0388283 B1 19941228 - Stainless ferritic steel and process for manufacturing this steel.
Title (en)
Stainless ferritic steel and process for manufacturing this steel.
Title (de)
Rostfreier ferritischer Stahl und Verfahren zur Herstellung dieses Stahls.
Title (fr)
Acier inoxydable ferritique et procédé pour l'élaboration d'un tel acier.
Publication
Application
Priority
FR 8903472 A 19890316
Abstract (en)
[origin: EP0388283A1] Ferritic stainless steel with ductility, shock-resistance and corrosion resistance in neutral or weakly acid chloridized media; also the prodn. process for fabrication of this steel. The steel is characterised by the following chemical composn.: 28.5-35 wt.% chromium, 3.5-5.50 wt.% molybdenum, 0.5-2 wt.% copper, less than 0.50 wt.% nickel, less than 0.40 wt.% manganese, less than 0.40 wt.% silicon, less than 0.030 wt.% carbon, less than 0.030 wt.% nitrogen, at least 0.10 wt.% but less than 0.60 wt.% titanium and/or niobium, and up to 0.10 wt.% deoxidizing additives such as aluminium, magnesium, calcium, boron or rare earth metals. The remainder of the material is composed of iron and impurities. The steel is worked in strip form. The steel strip is hot-rolled with reheating to a temp. of 900-1200 deg.C, followed by being cold-rolled. After this there is an intermediate stage of heating to 900-1200 deg.C. before a second cold-rolling. Finally the steel is reheated a last time to 900-1200 deg.C.
IPC 1-7
IPC 8 full level
C21D 8/00 (2006.01); C22C 38/00 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01)
CPC (source: EP US)
C22C 38/20 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0388283 A1 19900919; EP 0388283 B1 19941228; AT E116379 T1 19950115; AU 5289090 A 19901009; CA 2050315 C 19990427; DE 69015394 D1 19950209; DE 69015394 T2 19950817; DK 0388283 T3 19950403; ES 2069035 T3 19950501; FR 2644478 A1 19900921; FR 2644478 B1 19931015; JP H04504140 A 19920723; US 5230752 A 19930727; WO 9010723 A1 19900920
DOCDB simple family (application)
EP 90400666 A 19900313; AT 90400666 T 19900313; AU 5289090 A 19900313; CA 2050315 A 19900313; DE 69015394 T 19900313; DK 90400666 T 19900313; ES 90400666 T 19900313; FR 8903472 A 19890316; FR 9000169 W 19900313; JP 50495390 A 19900313; US 76192491 A 19910913