Minutes of Proceedings of the Institution of Civil Engineers Volume 46, PT. 4

Minutes of Proceedings of the Institution of Civil Engineers Volume 46, PT. 4

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1876 edition. Excerpt: ...still cogging. The only difference between rolling or hammering an ingot down to the bloom was that, in hammering, the result was an ingot with a rounded end, on account of the percussive force driving out the soft metal towards the end; and in the other case a bird's-mouth ingot, by drawing the metal over; the tensile strength and wearing properties were the same, whether the reduction was effected by hammering or by rolling. He did not understand what was meant by toughening by plunging into water. Steel with a sufficient amount of carbon was hardened by plunging into water; with less carbon it was made more resistant, but not tougher. As to punching and drilling, there was no difference in the results, except that in the punched rail there was sometimes a minute crack at the end which came out in the wear. Punching or drilling did not affect the actual strength of the rail. Mr. W. B. Lewis felt under great obligation to Mr. Price Williams for the mass of information he had collected, to which it seemed hopeless to attempt to add anything. But on one or two points he thought there was not material enough to form an accurate opinion. He had studied the table of analyses with great interest, but without much satisfaction. With reference to carbon, which was usually regarded as most important in the composition of steel, it was true that a rail with a minimum of carbon showed the best result. With rails 17 and 18 at the Maiden Lane tunnel the minimum of carbon showed the better result, but with the next two rails from Copenhagen tunnel, the circumstances being the same, the maximum of carbon gave the better result. Looking at the table, the only thing that seemed evident was, that the rail with the smallest amount of phosphorus was the...show more

Product details

  • Paperback | 128 pages
  • 189 x 246 x 7mm | 240g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236980638
  • 9781236980632