STEEL FOR RAILWAY ROAD RAILS Russian patent published in 2003 - IPC

FIELD: ferrous metallurgy, namely steel for making high strength railway road rails. SUBSTANCE: steel containing carbon, manganese, silicon, aluminum, calcium, nitrogen and ferrum contains in addition chrome, nickel, copper at next relation of ingredients (mass.%): carbon, 0.71 - 0.82; manganese, 0.75 - 1.05; silicon, 0.25 - 0.45; chrome, 0.01 - 0.30; nickel, 0.01 - 0.30; copper, 0.01 - 0.30; aluminum, 0.08 - 0.020; calcium, 0.003 - 0.08; nitrogen, 0.008 - 0.025; ferrum - the balance. Steel contains sulfur in quantity no more than 0.025 mass% and phosphorus in quantity no more than 0.025 mass%. EFFECT: enhanced exploitation characteristics of rail steel, lowered anisotropy of its mechanical properties. 2 cl, 3 tbl