STEEL Russian patent published in 1994 - IPC

FIELD: metallurgy. SUBSTANCE: steel has, wt. -% : carbon 0.22-0.3; silicon 0.58-0.65; manganese 0.9-1.3; chrome 1.5-2.5; vanadium 2.3-3.0; nitrogen 0.01-0.02; calcium 0.01-0.03; boron 0.01-0.03; aluminium 0.1-0.2; zirconium 0.9-1.4; molybdenum 2.3-2.9; niobium 1.3-1.8, and iron - the rest. Steel is used for heat unit members making. EFFECT: prolonged period of exploitation of articles made of steel proposed. 1 tbl