STEEL Russian patent published in 2008 - IPC C22C38/30 

FIELD: metallurgy, in particular, steel compositions used in boiler and turbine building.

SUBSTANCE: cast iron composition contains, wt%: carbon 0.8-1.2; silicon 0.2-0.4; chromium 2.5-3.5; tungsten 2.5-3.5; molybdenum 3.0-4.0; vanadium 1.0-1.5; cobalt 4.0-5.0; niobium 0.5-1.0; titanium 0.3-0.5; boron 0.03-0.08; gallium 0.003-0.008; zirconium 0.5-1.0; gadolinium 0.1-0.2; aluminum 0.1-0.2; lanthanum 0.1-0.2; hafnium 0.8-1.2; copper 0.1-0.2; iron the balance.

EFFECT: increased resistance of steel to thermal fatigue.

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