IRON

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FIELD : metallurgy.SUBSTANCE : iron consists of components at following ratio, mas. % : carbon 2.8-3.2; silicon 0.8-1.2; manganese 0.8-1.2; chromium 0.8-1.2; titanium 0.1-0.2; aluminium 0.1-0.2; copper 0.1-0.3; REE (rare earth elements) 0.1-0.2; niobium 0.3-0.8; molybdenum 4.5-5.0; tin 0.005-0.01; nitrogen 0.05-0.1; iron - the rest. EFFECT : upgrading of iron strength.1 tbl