. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . Fig. 221. — Comparative Wear of Rails of Similar Chemical Composition. (Trans. A. S. C. E. 1889.) ChemicalComposition Year RolledTime in Service Tonnage over Rail per cent Carbon per cent. per cent Silicon per cent. per cent Phosphorus per cent. per cent Manganese per cent. 1871 1876 August, 1871 to July, 1879 August, 1876 to July, 1879 7 years, 11 months. 2 years, 11 months. On high side of 5° Curve On high side of
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . Fig. 221. — Comparative Wear of Rails of Similar Chemical Composition. (Trans. A. S. C. E. 1889.) ChemicalComposition Year RolledTime in Service Tonnage over Rail per cent Carbon per cent. per cent Silicon per cent. per cent Phosphorus per cent. per cent Manganese per cent. 1871 1876 August, 1871 to July, 1879 August, 1876 to July, 1879 7 years, 11 months. 2 years, 11 months. On high side of 5° Curve On high side of 5° Curve Grade ft. per mile. Grade ft. per mile. 40,061,230 tons. 21,504,824 tons. Table LXXXIV gives the result of his experiments. TABLE LXXXIV. — WEAR OF RAILS (Dudley.) Level tangents Grade tangents Level curves Grade curves Low side level curves. .High side level side grade side grade Tangents Curves Levels Grades Low side curves High side curves All conditions 2 slower wearing 32 faster wearing .
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