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Nitrogen is the future hope of stainless steel industry; since in the production of austenitic steel it can even completely replace Nickel (which is relatively very expensive) in some cases and for another reason: It decreases the temperature at which carbides should form.
As a result, there is always an optimum Carbon to Nitrogen ratio.My problems are:

  1. How is N decreasing the temperature of the formation of carbides? Is it a catalyst or something?
  2. Resources, however, didn't mention how the N to C ratio is measured? How? Am I missing something very easy in here?

Update: I just found this paper in which almost all of the info above can be found; but it's not my main reference.

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