FIELD: foundry, in particular, production of high-strength spheroidal graphite cast iron. SUBSTANCE: modifier contains magnesium powder, magnesium nitride powder and magnesium silicide powder with particle size of 0.1-1.0 micron. Modifier components are used in the following ratio, % by weight: magnesium nitride 3-15; magnesium 5-20; magnesium silicide the balance. Modifier dispersed components are paraffin clad. EFFECT: increased efficiency and simplified composition. 3 cl
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