Austenitic stainless steel

Details Austenitic stainless steel Austenitic stainless steel

C - Chemistry, Metallurgy

22

C

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

Patent

CA 2597750

A new austenitic stainless steel with the following composition by weight is described: 0.03 % < carbon < 0.07 %, 7.0 % < manganese< 8.5 %, 0.3 % < silicon 0.7 %, sulphur < 0.030 %, phosphorus < 0.045 %, 16.5 % < chromium < 18.0 %, 3.5 % < nickel < 4.5 %, 0.1 % < molybdenum < 0.5 %, 1.0 % < copper < 3.0 %, 0.1 % < nitrogen < 0.3 %, the difference consisting in iron and common process impurities. The steel thus obtained has an optimum combination of corrosion resistance, deformability and work- hardening properties, which make it suitable as a substitute for normal steel type 1.4301 in various specific applications.

L~invention concerne un nouvel acier inoxydable austénitique ayant la composition en poids suivante : 0,03 % < carbone < 0,07 %, 7,0 % < manganèse < 8,5 %, 0,3 % < silicium < 0,7 %, soufre < 0,030 %, phosphore < 0,045 %, 16,5 % < chrome < 18,0 %, 3,5 % < nickel < 4,5 %, 0,1 % < molybdène < 0,5 %, 1,0 % < cuivre < 3,0 %, 0,1 % < azote < 0,3 %, la différence étant constituée de fer et d~impuretés courantes de procédé. L'acier obtenu ainsi possède une combinaison optimale de propriétés de résistance à la corrosion, d~aptitude au formage et d~écrouissage, qui le rendent approprié en tant que produit de remplacement d~un acier classique de type 1.4301 dans diverses applications spécifiques.

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