CAST IRON Russian patent published in 2008 - IPC C22C37/10 

FIELD: ferrous metallurgy; composition of gray cast irons; manufacture of steam, gas and water pipes, valves, fittings, valve bodies.

SUBSTANCE: proposed cast iron contains the following constituents, mass-%: 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; aluminum, 0.1-0.2; copper, 0.4-0.6; rare-earth elements, 0.1-0.2; niobium, 0.6-1.0; molybdenum, 2.0-3.0; zirconium, 0.1-0.2; nitrogen, 0.1-0.2; the remainder being iron.

EFFECT: enhanced strength of cast iron.

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