Global Patent Index - EP 0896072 B1

EP 0896072 B1 2002-12-04 - Austenitic stainless steel with very low nickel content

Title (en)

Austenitic stainless steel with very low nickel content

Title (de)

Rostfreier austenitischer Stahl mit sehr niedrigem Nickelgehalt

Title (fr)

Acier inoxydable austénitique comportant une très faible teneur en nickel

Publication

EP 0896072 B1 (FR)

Application

EP 98401734 A

Priority

FR 9709617 A

Abstract (en)

[origin: EP0896072A1] A low nickel content austenitic stainless steel has the composition (by wt.) less than 0.1% C, 0.1-1% (exclusive) Si, 5-9% (exclusive) Mn, 0.1-2% (exclusive) Ni, 13-19% (exclusive) Cr, 1-4% (exclusive) Cu, 0.1-0.40% (exclusive) N, 5 x 10<-4>-50 x 10<-4>% (exclusive) B, less than 0.05% P and less than 0.01% S. Preferably, both the ferrite index (IF1) and the martensite stability index (IS) are less than 20, where IF1 = 0.034 x x<2> + 0.284 x x - 0.347 and IS = 0.0267 x y<2> + 0.4332 x y - 3.1459, in which x = 6.903 x Ä-6.998 + Cr% - 0.972 x (Ni% + 20.04C% + 21.31N% + 0.46Cu% + 0.08Mn%)Ü and y = 250.4 - 205.4C% - 101.4N% - 7.6Mn% - 12.1Ni% - 6.1Cr% - 13.3Cu%.

IPC 1-7 (main, further and additional classification)

C22C 38/58

IPC 8 full level (invention and additional information)

C22C 38/00 (2006.01); C22C 38/58 (2006.01)

CPC (invention and additional information)

C22C 38/58 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/52 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU NL PT SE

EPO simple patent family

EP 0896072 A1 19990210; EP 0896072 B1 20021204; AT 229094 T 20021215; AU 742411 B2 20020103; AU 7733098 A 19990211; BR 9802669 A 19991130; CA 2243796 A1 19990129; CA 2243796 C 20100406; CN 1080774 C 20020313; CN 1213013 A 19990407; DE 69809853 D1 20030116; DE 69809853 T2 20030904; DK 0896072 T3 20030324; ES 2187905 T3 20030616; FR 2766843 A1 19990205; FR 2766843 B1 19990903; ID 20642 A 19990204; JP 4498481 B2 20100707; JP H1192885 A 19990406; PT 896072 E 20030430; TW 555870 B 20031001; US 6056917 A 20000502; ZA 9806701 B 19990204

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