Martensitic stainless steel and seamless steel pipes...

Details Martensitic stainless steel and seamless steel pipes... Martensitic stainless steel and seamless steel pipes...

C - Chemistry, Metallurgy

21

D

C21D 9/08 (2006.01) B21B 19/08 (2006.01) B21D 17/02 (2006.01) C21D 8/10 (2006.01) C22C 38/00 (2006.01) C22C 38/44 (2006.01) B21B 3/02 (2006.01) B21B 23/00 (2006.01) C21D 7/13 (2006.01)

Patent

CA 2409158

Martensitic stainless steel with high resistance to corrosion, consisting of the following ingredients: Mn from 0.1 % to 0.3 %, P <= 0.02 %, S <= 0.002 % Cr from 10 % to 13 %, C <= 0.02 wt%, Si from 0.1 % to = 0.3 wt%, Ni from 5 % to 8 %, Mo from 1.5 % to 3 %, N <= 0.02 % and use of the above-mentioned steel in the fabrication of seamless steel pipes with diameters of up to 28'', with a process of rotary-expansion rolling.

La présente invention concerne un acier inoxydable martensitique présentant une résistance élevée à la corrosion, comprenant les ingrédients suivants : Mn de 0.1 % à 3 % ; P <= 0.02 % ; S <= 0.002 % ; Cr de 10 % à 13 %, C <= 0.02 % en poids; Si de 0.1 % à = 0.3 % en poids ; Ni de 5 % à 8 % ; Mo entre 1.5 % à 3 % ; N <= 0.02 % et l'utilisation dudit acier dans la fabrication de conduites en acier sans soudure de diamètre allant jusqu'à 28 pouces, avec un procédé de laminage de dilatation sous système rotatif.

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