CAST IRON

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FIELD : metallurgy.SUBSTANCE : cast iron contains components in following ratio, wt % : carbon 3.2-3.8; silicon 1.0-2.0; manganese 0.2-0.6; rare-earth metals 0.3-0.5; zirconium 1.2-1.6; vanadium 0.3-0.5; boron 0.01-0.03; iron - the rest.EFFECT : increasing of cast iron thermostability.1 tbl