The chemical diffusion coefficients for Cr in the austenitic steel were determined by using diffusion couples and electron probe microanalysis techniques. The chemical volume diffusion coefficient, at 800 to 1200C, was described 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