THERMO RESISTANT STEEL Russian patent published in 2008 - IPC C22C38/32 

FIELD: metallurgy.

SUBSTANCE: invention refers to metallurgy and can be used at fabricating of items operated under excessive thermo cyclic loads, for example, for hot work tools. Steel contains mass.%: carbon 0.2-0.3; silicon 0.5-1.0; manganese 0.5-1.0; chromium 0.5-1.0; vanadium 0.3-0.5; titanium 0.3-0.5; copper 0.3-0.5; aluminium 0.1-0.2; molybdenum 0.1-0.2; nitrogen 0.01-0.02; calcium 0.003-0.005; boron 0.08-0.12; hafnium 0.3-0.5; tungsten 0.3-0.5; iron constitutes the remaining percentage.

EFFECT: upgraded thermo resistance of steel.

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