 | United States. War Department - 1892 - 1038 páginas
...be performed with perfect ease by avoiding all unnecessary friction and canting. All cast-iron parts of the machines must be made of close-grained, tough,...18,000 pounds per square inch, containing at least ÍÍO per cent of charcoal iron. All shafts, Iced and lead screws, spindles, feed and traversingnu-ks,... | |
 | United States. War Department - 1892 - 916 páginas
...be performed with perfect ease by avoiding all unnecessary friction and canting. All cast-iron parts of the machines must be made of close-grained, tough,...hard cast-iron, of a tensile strength of not less (han 18,000 pounds per square inch, containing at least 20 per cent of charcoal iron. All shafts, feed... | |
 | John Butler Johnson - 1895 - 444 páginas
...quality of iron, remelted in the cupola or air furnace, tough and of even grain, and shall possess a tensile strength of not less than 18,000 pounds per square inch. Test bars of the metal 3 inches by y2 inch, when broken transversely, 18 inches between supports, and... | |
 | John Butler Johnson - 1895 - 440 páginas
...quality of iron, remelted in the cupola or air furnace, tough and of even grain, and shall possess a tensile strength of not less than 18,000 pounds per square inch. Test bars of the metal 3 inches by J^ inch when broken transversely, 18 inches between supports and... | |
 | Amory Prescott Folwell - 1898 - 414 páginas
...quality of gray iron, remelted in the cupola or air-furnace, tough and of even grain, and shall possess a tensile strength of not less than 18,000 pounds per square inch. Test-bars of the metal 3 inches by A inch, when placed upon supports 18 inches apart and loaded in... | |
 | Cleveland (Ohio) - 1898 - 1218 páginas
...pounds, anda deflection of not less than 25-100 inch in a test piece of the size above described and a tensile strength of not less than 18,000 pounds per square inch. A chemical test was also made of this metal by one of the City's Chemists and pronounced to be of a... | |
 | Amory Prescott Folwell - 1901 - 506 páginas
...quality of gray iron, remelted in the cupola or air-furnace, tough and of even grain, and shall possess a tensile strength of not less than 18,000 pounds per square inch. Test-bars of the metal 3 inches by J inch, when placed upon supports 18 inches apart and loaded in... | |
 | San Francisco (Calif.). Board of Public Works, William Colin Robinson - 1908 - 216 páginas
...stuffing box, bonnet, disc, by-pass elbows and operating nut of all gates will be made of cast-iron having a tensile strength of not less than 18,000 pounds per square inch. All valves will be designed for a working pressure not less than the maximum static head at the location... | |
 | Henry Neely Ogden - 1908 - 384 páginas
...all named in the contract. IR0N. (31) The cast iron used for manhole covers shall be tough and have a tensile strength of not less than 18,000 pounds per square inch, with a light gray fracture. The castings shall be free from cracks, blow -holes or other imperfections,... | |
 | American Society of Naval Engineers - 1897 - 994 páginas
...were most carefully selected and inspected. Samples cut from all iron castings were required to show a tensile strength of not less than 18,000 pounds per square inch. Steel castings, a tensile strength of not less than 60,000 pounds per square inch, an elongation of... | |
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All iron castings shall be made from a superior quality of gray iron, remelted in the cupola or air-furnace, tough and of even grain, and shall possess a tensile strength of not less than 18,000 pounds per square inch. 