The temperatures of appearance and disappearance of short-range and long-range ordering in VDM® Alloy C-4 (UNS 2.4610/N06455) are determined with the help of physical methods of research. The sensitivity of the methods used to these effects is studied. The results obtained are used to make recommendations on determination of the temperatures of disordering-ordering and ordering-disordering transitions in alloys of the Ni - Cr - Mo system.