. American engineer and railroad journal . Sulphur Under Phosphorus 1-0 Manganese * In regard to the tensile tests, sometimes these reach 14 tonsper square inch, but generally, good cylinder-metal would beabout 12 tons per square inch. Transverse tests are taken onbars 3 feet between centers, 2 inches deep and 1 inch wide, andgive 28 cwt. before fracture. Crank-Axles.—The crank-axles used on all engines built bythis company up to 1901 were of the solid type without material was Siemens-Martin open hearth steel, having anultimate tensile breaking load of 28 to 32 tons, wi
. American engineer and railroad journal . Sulphur Under Phosphorus 1-0 Manganese * In regard to the tensile tests, sometimes these reach 14 tonsper square inch, but generally, good cylinder-metal would beabout 12 tons per square inch. Transverse tests are taken onbars 3 feet between centers, 2 inches deep and 1 inch wide, andgive 28 cwt. before fracture. Crank-Axles.—The crank-axles used on all engines built bythis company up to 1901 were of the solid type without material was Siemens-Martin open hearth steel, having anultimate tensile breaking load of 28 to 32 tons, with an elonga-tion of 25 per cent, on three inches, and the usual bend all the flaws on these axles occurred on the inside of theconnecting-rod journal at the bottom of the radius, where itjoins the crank-web, due to the constant opening and closing ofthe throws. The following diagram, Figs. 91, 92, and 93, andtabie below give the position and percentage of flaws:— These axles did very good service, averaging 250,000 miles. Section at a-b Section at c-d Diagram a? Position of Flatus and TabU ofPemntaot of Failures of Solid Cranh AxUs. from 1892 to 1309. 1 R r n f: F r. H I ■/ K / V hvmge Mileage Standard Goods. Wheels 3-idia,Cylinders tftfl& 6 s 27 12 3 6 21 3 IS 249332 Standard Coods. Wheels 5-1 duuCylinders IS *26 9 9 14 15 £ II 31 3 3 Radial Tanks. Wheels rt$ £ S 9 18 20 3 13 IS 2 3 4 2 283,674 Radial Tanks. Wheels IS * £6 11 3 35 n 3 3 n 3 Bogie i-3diaCylinders 18^ £S- 10 16 . 20 * 3 to 10 J * * From a paper presented before the Institution of Mechanical Engineersat the July meeting. t Chief Mechanical Engineer, L. & Y. Ry. 406 October, 1909. AMERICAN ENGINEER AND RAILROAD JOURNAL. 107 before being condemned. Having passed this mileage, axlesfrequently attain a life of 600,000 to 700,000 miles. Standardiza-tion and interchangcability caused the same type to be intro-duced
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
