. Transactions. ^r, occurs at absolute zero for a nickelcontent between 32 and 33 per cent, while the work of Chevenardindicates that this transformation would be entirely complete at abso-lute zero for a nickel content between 34 and 35 per cent. This is goodagreement, considering that different experimental methods have beenused, and the interesting conclusion seems justifiable that above 34 per * Hopkinson: Proc. Royal Soc. London (1890) 48, : Compt. Rend. (1899) 128, 304. Dumas: Fig. 89, p. 271 of Guillets text Etude Industrielle des Alliages M6tal-liques. Guertler and Tammann: Zei
. Transactions. ^r, occurs at absolute zero for a nickelcontent between 32 and 33 per cent, while the work of Chevenardindicates that this transformation would be entirely complete at abso-lute zero for a nickel content between 34 and 35 per cent. This is goodagreement, considering that different experimental methods have beenused, and the interesting conclusion seems justifiable that above 34 per * Hopkinson: Proc. Royal Soc. London (1890) 48, : Compt. Rend. (1899) 128, 304. Dumas: Fig. 89, p. 271 of Guillets text Etude Industrielle des Alliages M6tal-liques. Guertler and Tammann: Zeit. Anorg. Chem. (1905) 45, and Takagi: Sci- Rep. Tohoku Imperial Univ. (1917) 6, 321.» Boudouard: Jnl. Iron and Steel Inst. (1903) 63, 299.*Chevenard: Rev. de Met. (1914) 11, 841. Op. cit. 102 CRITICAL RANGES OF SOME COMMERCIAL NICKEL STEELS cent, nickel the iron at all temperatures is in the gamma state. Thiscritical composition corresponds remarkably closely to that of Fe2Ni( per cent, nickel).. 10 20 Per Cent Nickel Fia 1.—Transformation temperatures of iron-nickel alloys magnetically DETERMINED BY HoNDA AND TakAGI.
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