. 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 Location 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 montiis. 2 years, 11 months. On high side of 5° Curve On high side of 5° Curv
. 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 Location 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 montiis. 2 years, 11 months. On high side of 5° Curve On high side of 5° Curve Grade ft. per mile. Grade ft. per mile. Tonnage over Rail 40,061,230 tons. 21,504,824 tons. Table LXXXIV gives the result of his experiments. TABLE LXXXIV. — WEAR OF RAILS (Dudley.) Kind of Service. Level tangents Grade tangents Level curves Grade curves Low side level curves. .High side level side grade side grade curves Tangents Curves Levels Grades Low side curves High side curves All conditions 32 slower wearing 32 faster wearing Number ofRails. Average Loss ofMetal. .Numoer oi 3iim
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