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Updated: May 9, 2025
The stems and the branches of the brush took the place of the wire, and in their meshes the snow had been pressed through by its own weight, but held together by its curious ductility or tensile strength of which I was to find further evidence soon enough.
We have seen it in the grimy ravine by old Fort Duquesne, where, like the titanium which, in what way no chemist knows, increases the tensile strength of its steel, this practical idealism gives promise of a democracy that will stand a greater stress and strain.
The carriage or truck may be constructed on the plan adopted for the building of the longest type of modern bogie carriages for ordinary railways, the tensile strength of steel rods being largely utilised for imparting rigidity.
The frames of steel are single, with inside bearings to all the wheels, and the boiler, of steel, is 9 ft. 10 in. long and 4 ft. 2 in. diameter. The steel used has a tensile strength of 32 to 34 tons per square inch, all the rivets are put in by hydraulic pressure, and the magnetic oxide on the surface of the plates where they overlap is washed off by a little weak sal-ammoniac and water.
It is only necessary, therefore, to make the flanges of sufficient strength to resist effectually the crushing and tensile strains to which they are exposed, and to make the web of the beam of sufficient strength to prevent a distortion of its shape from taking place. Q. Is the strain greater from being movable or intermittent than if it was stationary?
Of course in practice it is seldom such, but generally nearly so, being usually 98, 99, or even more per cent. It is exceedingly prone to crystallization, the purer varieties being as much subject to it as others, except those contaminated with phosphorus, which affects it similarly with steel, and makes it very weak to cross and tensile strains.
"Equally nevertheless, Goodwin, the iron does meet Haeckel's three tests it can receive a stimulus, it does react to that stimulus and it retains memory of it; for even after the current has ceased it remains changed in tensile strength, conductivity and other qualities that were modified by the passage of that current; and as time passes this memory fades.
An obvious conclusion from all subsequent firing at thick iron plates was, that, to avoid cracking on the one hand, and punching on the other, wrought-iron armor should resemble copper more than steel, except that it should be elastic, although not necessarily of the highest tensile strength. Copper, however, proved much too soft. The experiments of Mr.
It is probable that powder-gas, from the excessive suddenness of its generation, exerts a percussive as well as a statical pressure, thus requiring great elasticity and a certain degree of hardness in the gun-metal, as well as high tensile strength. Cast-iron and bronze are obviously inadequate.
Every department of human industry is represented, from the quarrying and the cutting of the stones, the mining and smelting of the ores, the conversion of iron into steel by the pneumatic process, to the final shaping of the masses of metal into useful forms, and its reduction into wire, so as to develop in the highest degree the tensile strength which fits it for the work of suspension.
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