⁵⁷Fe and ¹¹⁹Sn conversion electron Mössbauer spectroscopy was used to study the radiation effect of 246 MeV Kr and 710 MeV Bi ions on electrochemically deposited amorphous Sn-Co-Fe coatings. The ion dependent changes induced by the swift heavy ion irradiation in the chemical short range order of these amorphous thin films regarding Fe and Sn atoms are discussed within the framework of the transient thermal spike model.