STEEL Russian patent published in 2007 - IPC C22C38/60 

FIELD: ferrous metallurgy.

SUBSTANCE: invention relates to steels used in energetic machine engineering. Proposed steel comprises the following components, wt.-%: carbon, 0.15-0.25; silicon, 2.0-3.0; manganese, 2.0-3.0; chrome, 8.0-10.0; nickel, 0.5-1.0; aluminum, 0.02-0.04; titanium, 0.1-0.3; calcium, 0.03-0.05; rare-earth elements, 0.08-0.12; copper, 0.3-0.5; selenium, 0.03-0.05; boron, 2.0-4.0, and iron, the balance. Invention provides enhancing heat-resistance and fluid-flow capacity of steel.

EFFECT: improved and valuable technical properties of steel.

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