Enthalpy of 6012 polycomponent aluminum alloy is measured by the method off adiabatic drop - calorimetry over the temperature range of 300-110K relative to 'base' temperature of 293.15K (20°C). The experimental results for all temperature range are approximated via computed temperature dependence of enthalpy by the method of least squares. The main thermodynamic parameters are determined which characterize the process of transition of 6012 alloy in molten state.