The diffusion of 185W in 0.03wt%C alloy was measured, at 1800 to 1970K, by using a thin-layer capillary method. It was found that the data could be described by:

D (cm2/s) = 1.4 x 10-3 exp[-14.9(kcal/mol)/RT]

P.Kubicek: Transactions of the Iron and Steel Institute of Japan, 1982, 22[5], 391-5