Identifier: americanengineer69newy (find matches)
Title: American engineer and railroad journal
Year: 1893 (1890s)
Authors:
Subjects: Railroad engineering Engineering Railroads Railroad cars
Publisher: New York : M.N. Forney
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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longation than to reduction of area, because of difficulties indetermining the exact areas for computing the latter. Withthe exception of one case, the bars composing the sets werecast from the same ladleful of iron, drawn about the middleladleful of the heat. All test bars received the same treatmentin the annealing oven as far as position iu the annealing potsand location in the oven were concerned. The results obtained aie ujt sufficiently numerous and uuiform to warrant any general conclusions regarding the effectof manganese aud phosphorus, further thau to say that phos-phorus seems to be a very passive element and anything butthe bugbear which it is iu steel. A limited period of anneal,judging from the results, might be considered as giving betterresults than an indefinitely longer one, both as regards strengthand malleability. The fact that there was no sure way oftelling whether bars were thoroughly auuealed aud yet notweukeued by over anneal makes the physical results given a
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UJ > I-o ooo o 0- soo cc LU o >■o I o wQ>5H g s aEB w gg a s uK as a o 0 CO aO w 3 O OS P-. o B w a. 05 0 o a oo c hJ CO PS w o PS wH ty averages of many tests can I lie truth lie known. In the tables that are appended to this paper the author has given some valuable and interesting Information regardingthe strength and other physical properties of malleable castiron. In a large number ol samples made from charcoal pigiron it was found that the average tensile strength per squareinch was 13,910 lbs., with a percentage of reduction of 3.81and of elongation of :.(.!)7. With samples taken from castingsmade from coke pig the tensile strength was 47,980 lbs. per square inch, and a percentage of reduction of 4.41 and of elongation of 5.81. If the author would supplement thiswork by a report on the observed limit o

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