Melchior is an alloy of copper and nickel; small amounts of iron and manganese are added to change some properties of this alloy. This alloy is quite well processed in cold and hot conditions, and also has a high corrosion resistance. The color of cupronickel is silver, it is visually difficult to distinguish from silver, due to such a feature of cupronickel, the alloy has been widely used in jewelry de le. It is also used in the manufacture of medical instruments, high-quality parts of marine boats and in precision mechanical products. The strength and corrosion resistance of this alloy increases with increasing nickel content. In the current conditions of industrial production, improvement of the technological and service properties of alloys is possible with the expansion of fundamental scientific research and the development of new technological conclusions based on them. The novelty of the research lies in the development of the original applied direction of materials science in mechanical engineering: the development of recommendations on the temperature-time regime for melting nickel silver MH19 based on the ideas about bringing the melt into a state of kinetic and thermodynamic equilibrium in order to improve and stabilize product quality. The temperature dependences of the structurally sensitive properties of a copper-based liquid alloy are investigated. On polytherms identified special points and sites. New experimental data on the physical properties of nickel silver brand MH19 are obtained. Kinematic viscosity, surface tension, density and electrical resistivity were measured in the temperature range from liquidus with an excess of 300-400 ºС. The polytherms obtained by measuring the kinematic viscosity, electrical resistivity, surface tension and density are constructed and presented. Based on the obtained experimental data, the following recommendations are proposed: minimum heating to a temperature of 1400 ºС, exposure ≈5 min for homogenization of the melt.