CAST IRON Russian patent published in 1994 - IPC

FIELD: metallurgy. SUBSTANCE: cast iron containing carbon, silicon, manganese, cerium, magnesium, aluminium, niobium, iron has additionally hafnium at the following ratio of components, wt. -% : carbon 3.0-3.5; silicon 4.2-5.2; manganese 0.8-1.2; cerium 0.005-0.01; magnesium 0.1-0.2; aluminium 0.08-0.12; niobium 0.2-0.7; hafnium 0.5-1.0, and iron - the rest. Cast iron is used for metallurgic equipment making. EFFECT: prolonged period of cast iron article exploitation. 1 tbl