CAST IRON

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FIELD : metallurgy, in particular, cast iron compositions.SUBSTANCE : cast iron contains components used in the following ratio, wt% : carbon 2.5-3.0; silicon 1.0-1.5; manganese 0.3-0.5; copper 0.4-0.8; rare-earth metals 0.05-0.15; niobium 0.3-0.5; aluminum 0.05-0.1; zirconium 0.5-1.0; titanium 0.2-0.4; chromium 0.2-0.4; magnesium 0.005-0.01; iron the balance.EFFECT : increased strength of cast iron.1 tbl