X6CrNiWNbN16-16 contains up to 1.2 % Nb, some C and N. It has an austenitic microstructure, but what is about the Nb? Does it precipitate in the matrix/ at grain boundaries?

And how about the creep behavior at room temperature? Is there any creep, maybe in the nm-range. I would also be happy about data at higher temperature.

Thank you all for answering :-)