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Author: gearloose
Time: 09/05/08 14:30 PST
This is a reply to message no. 19961 by lucasestrada
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Nitriding steels

It does a couple of things.  It can increase hardenability, by changing the austenite phase field, and by reducing the diffusion coefficient of iron (Ni doesn't participate in the formation of cementite).  You may also notice that nitriding steels with nickel tend to have lower carbon contents, which leads to lower carbon martensite and it's increased ductility.


In the North American designations, Nitralloy N per AMS 6475 (with 3.5% Ni) is used in higher load applications than Nitralloy 135M per AMS 6470, the standard grade of Nitralloy.

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