However, their total content expressed through aluminum and molybdenum equivalents can vary in a rather wide range. This is caused by small fluctuation intervals of their concentrations in the limits of the grade composition. It is revealed based on correlation analysis that the variation in amounts of each alloying element and impurity has little or no effect on the forging properties. The part of the variation in the forging properties caused by fluctuations of the content of major components and impurities, as well as by the influence of the structural type and sizes of structural components, is evaluated. It is established that the strength and plastic properties of single-type forgings vary rather widely. The statistical dependences of the mechanical properties of 218 forgings (15 dimension types) made of VT3-1 and VT6 alloys in 2000–2014 on the chemical composition (content of alloying elements and impurities and structural and strength aluminum and molybdenum equivalents), type, subtype, and structural parameters after annealing, quenching, and aging are investigated.
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