The chemical diffusion coefficients for Cr in austenitic and ferritic steels were determined by using diffusion couples and electron probe microanalysis techniques. The average chemical volume diffusion coefficient, for the austenitic AISI310 alloy at 800 to 1200C, was given by:

D (cm2/s) = 2.7 x 10-1 exp[-246(kJ/mol)/RT]

P.I.Williams, R.G.Faulkner: Journal of Materials Science, 1987, 22[10], 3537-42