Corrosion resistant lean austenitic stainless steel

Details Corrosion resistant lean austenitic stainless steel Corrosion resistant lean austenitic stainless steel

C - Chemistry, Metallurgy

22

C

C22C 38/02 (2006.01) C22C 38/42 (2006.01) C22C 38/44 (2006.01) C22C 38/52 (2006.01) C22C 38/58 (2006.01)

Patent

CA 2706478

An austenitic stainless steel composition having low nickel and molybdenum and exhibiting high corrosion resis- tance and good formability. The austenitic stainless steel includes, in weight %, up to 0.20 C, 2.0-6.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 5.0-7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities. The austenitic stainless steel has a ferrite number less than 11 and an MD30 value less than - 10°C.

L'invention porte sur une composition d'acier inoxydable austénitique ayant de faibles teneurs en nickel et en molybdène et présentant une résistance à la corrosion élevée et une bonne aptitude au formage. L'acier inoxydable austénitique comprend, en % en poids, jusqu'à 0,20 C, 2,0-6,0 Mn, jusqu'à 2,0 Si, 16,0-23,0 Cr, 5,0-7,0 Ni, jusqu'à 3,0 Mo, jusqu'à 3,0 Cu, 0,1-0,35 N, jusqu'à 4,0 W, jusqu'à 0,01 B, jusqu'à 1,0 Co, du fer et des impuretés. L'acier inoxydable austénitique a un indice de ferrites inférieur à 11 et une valeur MD30 inférieure à -10 °C.

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