The paper studies the combined effects of rare earth metals such as praseodymium, neodymium and erbium, melting technologies on intermetallic alloy based on nickel aluminide and pure charge materials using 25, 50 and 75 wt. % of waste, the technology of casting single-crystals of crystallographic orientation [001] and their heat treatment combined with hot isostatic pressing (HIP), on mechanical properties and long-term strength at the level of passport data.