Abstract <p>The temperature and concentration behavior of the kinematic viscosity of Cr_{88–<i>x</i>}Fe₁₂C_<i>x</i> (<i>x</i> = 11–18 at %) melts is studied by the oscillating crucible method. The temperature dependences of the viscosities of the melts are shown to coincide upon heating and cooling, to be monotonic, and to be described by Arrhenius-type dependences. The maximum that is observed for the first time in the concentration dependences of the Cr_{88–<i>x</i>}Fe₁₂C_<i>x</i> (<i>x</i> = 11–18 at %) melts near 17 at % C is likely to be due to the specific features of the nonequilibrium (Cr,Fe)–Cr₇C₃ phase diagram in the concentration region under study.</p>