Abstract
IN a pamphlet on “Les Aciers au Nickel et leurs Applications à 1'Horologerie“(Paris, Gauthier Villars), M. Ch-Ed. Guillaume gives in a simple form an account of the properties of nickel steels and of their application to the construction of compensated clocks, chronometers, torsion clocks, and even watches. The well-known peculiarities of the nickel steels as regards dilatation and variation of elastic modulus and other properties with temperature are briefly described and explained on the ground that the presence of nickel depresses the temperature of the allotropic modification which occurs in iron at 890° C., and at the same time changes the transformation point of iron into a wide range of transformation temperature in the alloys. It is when they are within this widened transformation range that these steels possess abnormally low coefficients of expansion, &c.
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ROSENHAIN, W. Nickel Steels in Clock Construction . Nature 91, 200 (1913). https://doi.org/10.1038/091200a0
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DOI: https://doi.org/10.1038/091200a0