STEEL Russian patent published in 2018 - IPC C22C38/54 

FIELD: metallurgy.

SUBSTANCE: invention relates to ferrous metallurgy, in particular to composition of steels. Can be used for manufacture of thermal units component parts, furnaces, metallurgical equipment, crackers. Steel contains, mass%: carbon 0.4–0.5; silicon 0.3–0.35; manganese 0.4–0.6; chromium 3.0–3.5; molybdenum 0.1–0.15; vanadium 0.6–0.8; titanium 0.04–0.06; nickel 1.4–1.8; boron 0.015–0.017; aluminum 0.2–0.25; copper 0.7–1.1; hafnium 4.5–5.0; iron – the rest.

EFFECT: steel has high heat resistance.

1 cl, 1 tbl