Carnegie Scholarship Memoirs Volume 5

Carnegie Scholarship Memoirs Volume 5

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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. 1913 edition. Excerpt: ...of various Steels. The author hopes to be able to make a much fuller examination of the oxygen content of various steels and irons than has been possible so far, the object of this research having been to work out a satisfactory method of estimation. The following results were obtained while testing the applicability of the method. One sample only of each steel was analysed, and while the results are probably representative, it is not suggested that all steels made by the same process and with the same carbon content would give the same figures. The first five steels are by the same maker, and similar except for carbon content. Number 6 is by the same process but a different maker---the same sample as No. 2 above. The cast iron, No. 8, is from a casting of grey iron. The Swedish bar iron, No. 7, contained carbon 0013 per cent., manganese 0025 per cent., silicon 0.01 per cent., and was of the quality generally used for standards as 99.9 per cent. iron. The amount of oxygen found in the last is startling, being more than four times as great as the total amount of other _ impurities. Oxygen present Sample. Carbon Process of Manufacture. as Oxides l l Per Cent. ' Per Cent. 1 0.10 Basic open-hearth 0038. 0036 2 0.20 Same 0.031. 0.028 3 0.30 Same 0030, 0.02'! 4 0.44 Same 0029. 0025 5 0.55 Same 0.020, 0.020 6 0.75 Same 0025, 0026. 0027 7 0.013 Swedish bar iron 0.358, 0-352 8 Soft grey cast iron cast 0.009, 0.006 ' in foundry; SUMMARY. A brief review is given of our knowledge of the compounds containing oxygen which occur in iron and steel. Methods used by other workers for the estimation of oxygen are critically examined and causes for their failure adduced. These causes are briefly--(1) For wet methods: the uncertainty of the more

Product details

  • Paperback
  • 189 x 246 x 3mm | 100g
  • United States
  • English
  • black & white illustrations
  • 1236979044
  • 9781236979049