CAST IRON

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FIELD : ferrous metallurgy, in particular, gray iron compositions used for manufacture of parts operating under increased dynamic loading conditions.SUBSTANCE : cast iron composition contains, wt% : carbon 2.7-3.3; silicon 0.7-1.3; manganese 0.4-0.8; chromium 0.4-0.8; copper 0.8-1.2; zirconium 0.5-1.0; nickel 2.0-2.5; molybdenum 0.4-0.8; niobium 0.1-0.2; magnesium 0.01-0.02; rare-earth metal 0.05-0.1; iron the balance.EFFECT : increased cracking resistance of cast iron.1 tbl