Diffusion was measured in low-alloy (3335 series) ferritic steel (3Ni-0.78Cr-0.65wt%Mn) at 673 to 873K. The HIRBS technique was used. The Sn diffusivity was higher than that of Fe self-diffusion. The results could be described by:

D (m2/s) = 3 x 10-6 exp[-207(kJ/mol)/RT]

It was found that Sn diffusion was faster in pure α-Fe.

D.N.Torres, M.J.Iribarren, R.A.Pérez, F.Dyment: Materials Letters, 2006, 60[3], 301-4