A manual of rules, tables, and data for mechanical engineers; based on the most recent investigations - Softcover
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1884 Excerpt: ...12 inches in diameter--two annealed and two unannealed--were cut out of the plates and pressed through an aperture 10 inches in diameter, the same as shorn) in Figs. 204 and 205, page 584. Tensile Strength Of Iron Wire. Mr. Barlow deduced from experiments by Mr. Telford on the strength of iron wire from '/io inch to /JO inch in diameter, that the ultimate tensile strength was equivalent to 36 tons per square inch of section. The tensile strength of Warrington iron wire is given at page 247:--Unannealed, about 36 tons per square inch; annealed, about 24 tons per square inch. Amtrican Wire.--Mr. Roebling states that bar iron of from i inch to i Vz inches square, fit to make the best quality of wire, should have a tensile strength of 60,000 Ibs., or 27 tons per square inch. The same iron, reduced to No. 9 wire, bears 100.000 Ibs., or 44 tons per square inch; and, if drawn to No. 20 wire, it will bear from 20,000 Ibs. to 30,000 Ibs., or 9 to 13 tons, more. From these data it would appear that wire made of the best qualities of iron has about the same strength as some qualities of steel wire. The tensile strength of American iron wire, together with that of wire from the cables of a suspension bridge after having been 32 years in use, according to Professor Thurston, are as in table No. 194. Table No. 194.--Tensile Strength Of American Iron Wire. 1875. Shearing And Punching Strength Of Wrought Iron. Swedish bar iron bore an average shearing stress of 15.20 tons per square inch; the ultimate tensile strength was 18.80 tons (page 581). The shearing resistance of bars 3 inches by y? inch and i inch thick, flatwise, with parallel cutters, and to punching i-inch and 2-inch holes through bars inch, i inch, and i J inches thick--the power being applied through a hydrau...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1884 Excerpt: ...12 inches in diameter--two annealed and two unannealed--were cut out of the plates and pressed through an aperture 10 inches in diameter, the same as shorn) in Figs. 204 and 205, page 584. Tensile Strength Of Iron Wire. Mr. Barlow deduced from experiments by Mr. Telford on the strength of iron wire from '/io inch to /JO inch in diameter, that the ultimate tensile strength was equivalent to 36 tons per square inch of section. The tensile strength of Warrington iron wire is given at page 247:--Unannealed, about 36 tons per square inch; annealed, about 24 tons per square inch. Amtrican Wire.--Mr. Roebling states that bar iron of from i inch to i Vz inches square, fit to make the best quality of wire, should have a tensile strength of 60,000 Ibs., or 27 tons per square inch. The same iron, reduced to No. 9 wire, bears 100.000 Ibs., or 44 tons per square inch; and, if drawn to No. 20 wire, it will bear from 20,000 Ibs. to 30,000 Ibs., or 9 to 13 tons, more. From these data it would appear that wire made of the best qualities of iron has about the same strength as some qualities of steel wire. The tensile strength of American iron wire, together with that of wire from the cables of a suspension bridge after having been 32 years in use, according to Professor Thurston, are as in table No. 194. Table No. 194.--Tensile Strength Of American Iron Wire. 1875. Shearing And Punching Strength Of Wrought Iron. Swedish bar iron bore an average shearing stress of 15.20 tons per square inch; the ultimate tensile strength was 18.80 tons (page 581). The shearing resistance of bars 3 inches by y? inch and i inch thick, flatwise, with parallel cutters, and to punching i-inch and 2-inch holes through bars inch, i inch, and i J inches thick--the power being applied through a hydrau...
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