An al-mn-si-n austenitic stainless acid-resisting steel

C - Chemistry – Metallurgy – 22 – C

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C22C 38/06 (2006.01) C22C 38/00 (2006.01) C22C 38/04 (2006.01)

Patent

CA 2229990

The invention relates to an Al-Mn-Si-N stainless acid-resisting steel substantially free of both Cr and Ni elements, which comprises the following elements: 0.06- 0.12 C, 4-5 Al, 16-18 Mn, 1.2-1.5 Si, 0.15-0.30 N, 0.1-0.2 Re and the balance Fe. The corrosion resistance and mechanical properties of the steel can be further improved by adding a small amount of element(s) selected from the group consisting of Cr, Ni, Co, Ti, Nb, Cu, Mo, Zr, Hf, W and the like. The stainless steel has good corrosion resistance, pressure processing charateristics and welding performance, which can be made into a variety of stainless steel product and can be used in a broad field.

Un acier inoxydable de type Al-Mn-Si-N essentiellement exempt de Cr et de Ni est constitué par 0,06-0,12 % en poids de C, 4-5 % en poids d'Al, 16-18 % en poids de Mn, 1,2-1,5 % en poids de Si, 0,15-0,30 % en poids de N, et 0,1-0,2 % en poids d'autres métaux résiduels, le restant étant du fer. Les propriétés de résistance à la corrosion et de résistance mécanique peuvent être encore améliorées en ajoutant de petites quantités de Cr, Ni, Co, Ti, Nb, Cu, Mo, Zr, Hf, etc. L'acier inoxydable selon l'invention, se travaille facilement à la presse et il est facile à souder. Il peut servir à réaliser toute une gamme d'articles en acier, utilisables dans de nombreuses applications.

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