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FIELD : metallurgy.SUBSTANCE : invention refers to metallurgy, particularly to composition of iron. Iron contains elements at the following ratio, wt % : carbon 3.2-3.6; silicon 1.4-1.6; manganese 0.5-0.9; rare earth elements 0.2-0.3; vanadium 0.1-0.15; cobalt 0.7-1.1; aluminium 0.1-0.15; iron - the rest.EFFECT : increased heat resistance of iron.1 tbl