Duplex stainless steel

C - Chemistry – Metallurgy – 22 – C

Patent

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Details

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

Patent

CA 2397592

The present invention relates to a duplex stainless steel alloy with austenite- ferrite structure, which in hot extruded and annealed finish shows, high strength, good corrosion resistance and good weldability, which is characterized in that the alloy contains in weight-% max 0.05 % C, 0-2.0 % Si, 0-3.0 % Mn, 25-35 % Cr, 4-10 % Ni, 2-6 % Mo, 0.3-0.6 % N, as well as Fe and normally occurring impurities and additions, whereby the content of ferrite is 30-70 %.

L'invention porte sur un acier inoxydable duplex à structure austénitique-ferritique qui après extrudage à chaud et recuit présente une grande résistance mécanique, une grande résistance à la corrosion et une bonne soudabilité, et se caractérise en ce que l'alliage contient en % du poids total: au max 0,05 % C, 0-2,0 % Si, 0-3,0 % Mn, 25-35 % Cr, 4-10 % Ni, 2-6 % Mo, 0,3-0,6 % N, ainsi que du Fe et les impuretés normales, et que sa teneur en ferrite est de 30-70 %.

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