Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 60
ts of Steel. 47 Rule VII.—Each boiler-plate must be subjected to tlie same tests, andiu the manner prescribed for sliip-plates. The ductility in eight inchesmust not be less tlian 2.5 per cent., and the ultimi te tensile strength mustnot be less than 57,000 pounds, and not more than 63,000 pounds,… … y.B.-Figures marked* mai/ be alteredto suit testing machine In the original specifications, it will he observed by reference to tiieabove rules, that plates of only 58,000 pounds tensile strength, mightpass, provided the average of all the test-pieces was 60,000 pounds, orover; but, in the amended…
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