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In the present article, an attempt was made to review the weldability of high nitrogen steels. In the last few years, a lot of work has been put into a better understanding and processing of this class of steels. Through our metallurgical knowledge, it is obvious that the nitrogen content in the weld zone is the essential factor. It is a major task to identify all parameters influencing nitrogen content in the weld metal. PRESSURE WELDINGNot much literature is available on pressure welding, [1,2] where it is reported that processes like flash-butt welding and friction welding are unproblematic regarding the nitrogen content and the formation of bubbles or pores. In friction welding, two alloys of the type X2CrNi22-9 were investigated and it was found that tensile strength is decreasing with longer friction times. This observation is attributed to the formation of chromium nitrides precipitating in the vicinity of the bond-line.

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