STEEL Russian patent published in 2008 - IPC C22C38/54 

FIELD: metallurgy.

SUBSTANCE: invention proposes steel comprising the following components, wt.-%: carbon, 0.4-0.6; silicon, 0.4-0.6; manganese, 0.5-1.5; chrome, 0.5-1.0; nickel, 1.5-2.0; molybdenum, 3.0-4.0; aluminum, 0.1-0.2; calcium, 0.005-0.01; niobium, 0.8-1.2; tantalum, 0.15-0.2, and iron, the balance. Proposed steel shows the enhanced strength and creep limit. Invention can be used transport machine engineering and production of pump-compressor equipment.

EFFECT: improved and valuable technical properties of steel.

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