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FIELD : metallurgy.
SUBSTANCE : cast iron contains, wt : % : . carbon 3.0-3.5; silicon 3.0-3.5; manganese 0.2-0.4; chrome 0.2-0.4; copper 0.2-0.4; rare-earth metals 0.1-0.14; palladium 0.0001-0.0002; nickel 0.4-0.6; zirconium 0.1-0.14; iron - the rest.
EFFECT : improvement of castings.
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