STEEL Russian patent published in 1997 - IPC

FIELD: metallurgy, namely, composition of steel being used for manufacturing details by swaging. SUBSTANCE: steel comprises, mas.%: carbon, 0.46-0.54; silicium, 0.10-0.30; manganese, 0.95-1.15; aluminium, 0.010-0.030; nickel, 0.03-0.15; copper, 0.03-0.15; nitrogen, 0.005-0.0012; molybdenum, 0.005-0.060; chromium, 0.03-0.15; sulfur, 0.005-0.015; phosphorous, 0.005-0.020; antimony, 0.0002-0.003; tin, 0.0005-0.01; lead, 0.0002-0.003; zinc, 0.0002-0.003; bismuth, 0.0002-0.003; arsenic, 0.001-0.010, ferrum, the balance. Summary content of antimony, tin, lead, zinc, bismuth and arsenic is 0.026 or less; content of molybdenum, aluminium and nitrogen are so that ratio (Mo+Al)/N being 1.25-18. EFFECT: increased strength and service period of desired metal articles, improved workability of steel, improved quality of metal surface. 2 tbl