Corrosion resistant austenitic alloy

C - Chemistry – Metallurgy – 22 – C

Patent

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Details

C22C 38/44 (2006.01) C22C 38/00 (2006.01) C22C 38/42 (2006.01) C22C 38/50 (2006.01) C22C 38/58 (2006.01)

Patent

CA 2403266

An austenitic alloy having improved ductility/processability and improved pitting and crevice corrosion resistance comprising, in % by weight, about: 25- 30 % Ni; 19-23 % Cr; 6-8 % Mo; 0.3-0.5 % N; 0.5 % Mn; 0-1.5 % Cu; 0-0.2 % C; 0- 1 % Al; 0-0.01 % S; 0-1 % Ti; 0-1 % Si; up to trace amounts of Mg, Ca, and Ce; and balance Fe plus incidental impurities.

L'invention concerne un alliage austénitique présentant une aptitude au pliage et au traitement améliorée et une résistance à la corrosion perforante et à la corrosion caverneuse. Cet alliage contient, en pourcentage en poids, environ: 25 à 30 % de Ni; 19 à 23 % de Cr; 6 à 8 % de Mo; 0,3 à 0,5 % de N; 0,5 % de Mn; 0 à 1,5 % de Cu; 0 à 0,2 % de C; 0 à 1 % de Al; 0 à 0,01 % de S; 0 à 1 % de Ti; 0 à 1 % de Si; des quantités restreintes de Mg, Ca, et Ce; le reste consistant en du fer et des impuretés occasionnelles.

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