TOOL STEEL Russian patent published in 1997 - IPC

FIELD: metallurgy. SUBSTANCE: steel has, wt.-%: carbon, 0.7-1.4; silicon, 0.1-1.2; manganese, 0.1-1.0; tungsten, 0.1-2.5; molybdenum, 3.5-7.5; chrome, 1.5-2.9; vanadium, 0.9-3.0; rare-earth metals, 0.001-0.3; calcium, 0.001-0.25; nitrogen, 0.003-0.2; aluminium, 0.02-2.0; titanium, 0.01-0.8; and iron, the balance. Steel has heat capacity 63.0-63.5 HRC and high hot hardness. EFFECT: improved quality and property of steel. 2 tbl