Cr-mn-ni-cu austenitic stainless steel

Details Cr-mn-ni-cu austenitic stainless steel Cr-mn-ni-cu austenitic stainless steel

C - Chemistry, Metallurgy

22

C

C22C 38/58 (2006.01) C21D 8/00 (2006.01) C22C 38/00 (2006.01) C22C 38/42 (2006.01) C22C 38/44 (2006.01) C21D 8/02 (2006.01) C21D 8/06 (2006.01)

Patent

CA 2348909

An austenitic stainless steel alloy is disclosed that has the following broad weight percent composition: C 0.025-0.15; Mn 4-12; Si 1.0 max.; P 0.2 max.; S 0.1 max.; Cr 15.5-17.5; Ni 1-4; Mo 0.25-1.5; Cu 1.5-4; W 1.0 max.; Co 1.0 max.; N 0.05-0.30. The balance of the alloy is iron and the usual impurities. Within the foregoing ranges, the elements are balanced such that the combined amount of carbon and nitrogen is at least about 0.19 %, the combined amount of chromium and molybdenum is less than about 17.75 % and %Cr + 3.3(%Mo) + 13(%N) > 20.5. The alloy provides a unique combination of corrosion resistance, formability, and resistance to work hardening.

Alliage d'acier inoxydable austénitique possédant la composition suivante en pourcentages en poids: C 0,025-0,15; Mn 4-12; Si 1,0 max.; P 0,2 max.; S 0,1 max.; Cr 15,5-17,5; Ni 1-4; Mo 0,25-1,5; Cu 1,5-4; 1,0 max.; Co 1,0 max.; N 0,05-0,30. Le reste de l'alliage est composé de fer et des impuretés usuelles. Dans les plages précitées, les éléments sont équilibrés de sorte que la quantité combinée de carbone et d'azote est d'au moins 0,19 % environ, la quantité combinée de chrome et de molybdène est inférieure à 17,75 % et %Cr+3,3(%Mo)+13(%N)~20,5. Cet alliage combine les propriétés de résistance à la corrosion, de capacité de formage et de résistance au durcissement.

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