The diffusion of H was studied at 200 to 700C. The results could be described by:

D (cm2/s) = 1.85 x 10-2 exp[-10.1(kcal/mol)/RT]

T.O.Ogurtani: Metallurgical Transactions, 1971, 2[11], 3035-8

The best linear fits to the solute diffusion data ([1015] to [1019], [1021] to [1030]) yield:

H: Ln[Do] = 0.55E – 9.4 (R2 = 0.92); N: Ln[Do] = 0.23E – 12.2 (R2 = 0.73);

Nb: Ln[Do] = 0.20E – 19.4 (R2 = 0.94)