STEEL (ITS VARIANTS) Russian patent published in 1997 - IPC

FIELD: metallurgy. SUBSTANCE: steel has by variant 1, wt.-%: carbon 0.04-0.06; silicon 0.1-0.3; manganese 0.4-0.6; chrome 14-16; nickel 4.1-5; copper 1.5-2; titanium 0.03-0.06; nitrogen 0.1-0.2, and iron - the rest. Steel has by variant 2, wt.-%: carbon 0.04-0.06; silicon 0.1-0.3; manganese 0.4-0.6; chrome 14-16; nickel 4.1-5; copper 1.5-2; titanium 0.03-0.06; nitrogen 0.1-0.2; vanadium 0.02-0.2; molybdenum 0.05-1.5, and iron - the rest. Martensite-ageing steel is used in machine engineering and instrument making. EFFECT: increased strength and viscosity at the retained corrosion resistance. 2 cl, 2 tbl