Reports of the Commissioners of the United States to the International Exhibition Held at Vienna, 1873 Volume 3

Reports of the Commissioners of the United States to the International Exhibition Held at Vienna, 1873 Volume 3

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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. 1876 edition. Excerpt: different it becomes a very serious matter. Even the property of the tin of oxidizing easily seems to exhibit itself in this case, as it diminishes the chemical affinity of the metals still further, and thereby assists their separation. As a proof of the occurrence of these conditions in alloy, we may mention that rich bronze, of a very homogeneous character, is always found in the smaller parts of bronze castings; for example, in the cascabel or in the trunnions of a gun. This bronze contains about 8 per cent, of tin, while the body of the gun is penetrated by thin sheets of tin. An 8-inch tube was made at the Eoyal Imperial arsenal, for which 2S,000 kilograms (61,600 pounds) of metal were employed at once. The greatest diameter of this casting was about 0.84 meter, and the proportion of tin at this part was 8 per cent, ou the outside and 12 per cent, on the inside. The reason why bronze with 8 per cent, of tin has not yet been employed for guns is that its wear is greater than even that of 10-percent, bronze. "(inn-metal" has long been employed because of its great tenacity and consequent safety, and also because it has the ad van 'tage of cheapness and ease in working. Its strength has satisfied the demand nearly up to the present time, and it has, therefore, been retained in the manufacture of field-pieces, in spite of its tendency to bulge and to burn out. Modern requirements, however, will no longer permit its application as formerly. From an accompanying table of properties of types of gun-bronze, we find those of ordinary guu-brouze, as compared with Krupp's steel for guns, to be--We see that the tenacity as well as the limit of elasticity of eaststeel is almost twice as great as that of ordinary bronze, which has evrti more

Product details

  • Paperback | 234 pages
  • 189 x 246 x 12mm | 426g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236549082
  • 9781236549082