By -
Date 07-31-2005 12:52
Nitrogen will affect tacks just as it would any other part of the weld. In the TIG process, the argon purge will negate the arc characteristics upon start where that should not be a problem. The main problem with a nitrogen purge is the breaking off of the tungsten, thus causing the real possibility of tungsten inclusions. That, and the depletion of some of the austenite in the weld pool.
Chuck