A new high Mn-Ni free (duplex stainless steel) DSS containing 18Cr-6Mn-1Mo-0.2N has been developed by examining the effects of manganese on the corrosion and mechanical properties of high Mn SSs containing 18Cr-4~11Mn-0~2Ni-0~1Mo-0.2N. The alloy with 45% ferrite is found to be an optimum alloy with much higher mechanical strength and similar corrosion resistance compared with those of standard SS304, at an economical cost. In addition, the alloy was free of precipitation of sigma phase and Cr-nitride when exposed to high temperatures due primarily to relatively low contents of Cr, N and Mo. With an increase in Mn content, the resistance to pitting and metastable pitting corrosion of high Mn DSS decreased since the number of (Mn, Cr) oxides, acting as preferential sites of pitting, increased with the Mn content.


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    Title :

    Development of high Mn-N duplex stainless steel for automobile structural components


    Additional title:

    Entwicklung von nichtrostendem Duplexstahl mit hohem Mn-N-Anteil für tragende Automobilbauteile


    Contributors:

    Published in:

    Corrosion Science ; 50 , 2 ; 404-410


    Publication date :

    2008


    Size :

    7 Seiten, 8 Bilder, 1 Tabelle, 41 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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