RAIL STEEL Russian patent published in 2011 - IPC C22C38/46 

FIELD: metallurgy.

SUBSTANCE: rail steel contains carbon, manganese, silicon, chromium, aluminium, vanadium, calcium, nitrogen, nickel, barium, iron and impurities at following ratio of components, wt %: carbon from 0.60 to less 0.71, manganese 0.60 - 1.20, silicon 0.40 -1.10, chromium 0.50 - 1.20, aluminium not over 0.005, vanadium 0.08-0.20, calcium 0.0001 - 0.010, nitrogen 0.010 - 0.020, nickel 0.03 - 0.20, barium 0.0001 - 0.010, iron and impurities - the rest. As impurities steel contains sulphur not over 0.030 %, phosphorus not over 0.025 %, copper not over 0.040 %.

EFFECT: upgraded complex of physical-mechanical properties and operational strength of split rails.

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