The diffusivity of N at 1600 to 1700C could be described by:

D (cm2/s) = 1.07 x 10-3 exp[-11.0(kcal/mol)/RT]

V.I.Arkharov, G.S.Ershov, I.A.Novokhatskii: Fizika Metallov i Metallovedenie, 1970, 29[4], 876-8