Circular of the Bureau of Standards Volume 100

Circular of the Bureau of Standards Volume 100

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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. 1921 edition. Excerpt: ...on the composition. The presence of carbon causes further complications in the properties and behavior of these alloys and will be considered oniy in connection with the nickel steels of low nickel content. (a) NICKEL STEELS Nickel steel was the fourth alloy steel to be introduced and was first described in some detail by James Riley (530). The general subject of nickel steels is too broad for anything but the merest mention in this place, and references should be consulted for further details. The principal effects of the addition of nickel to steel are the following: (1) Nickel depresses the critical temperature ranges of steel, and according to the degree of such depression we may consider three groups of nickel steels--namely, pearlitic steels, which have normal transformation and heat treatment or critical ranges and 1C. ttl tUU 1JU 140 Fig. 21.--Structural classification of nickel steels according to Guillet are similar to ordinary carbon steels in a general sense; martensitic steels, self-hardening but too brittle to be of any importance commercially; and austenitic steels, which are not susceptible to hardening by thermal treatment, and may perhaps more properly be considered as ferromckel alloys containing carbon. The nickel and carbon content of the steel determine its inclusion in any one of the above groups. Fig. 21 according to Guillet gives a classification of different compositions of nickel steels. (2) Nickel dissolves in the ferrite of steel and increases the hardness and strength without a corresponding loss of ductility. Thus Bullens (516) states that the addition of each i per cent (up to 5 per cent) of nickel to steel of forging grades will, without loss of ductility, increase the tensile strength and more

Product details

  • Paperback | 34 pages
  • 189 x 246 x 2mm | 82g
  • United States
  • English
  • black & white illustrations
  • 1236770668
  • 9781236770660