Transactions . Section from original unhealed etched with sodium picrate. Micrograph letter. EXISTING DATA AS TO THE POSITION OF AE3. 611 Discussion of the Existing Data as to the Position of Ae3.* BY H. M. HOWE,f NEW YORK, N. Y. (New York Meeting, October, 1913.) Part I. Introductory. § 24. Introduction.—This paper discusses the chief existing dataas to the temperature, in iron-carbon alloys, of Ae3, the upper limitof the transformation range when in equilibrium, as distinguishedfrom Ac3, the temperature at which the end of the transformation isnoted in heating up, and from Ar3, that
Transactions . Section from original unhealed etched with sodium picrate. Micrograph letter. EXISTING DATA AS TO THE POSITION OF AE3. 611 Discussion of the Existing Data as to the Position of Ae3.* BY H. M. HOWE,f NEW YORK, N. Y. (New York Meeting, October, 1913.) Part I. Introductory. § 24. Introduction.—This paper discusses the chief existing dataas to the temperature, in iron-carbon alloys, of Ae3, the upper limitof the transformation range when in equilibrium, as distinguishedfrom Ac3, the temperature at which the end of the transformation isnoted in heating up, and from Ar3, that at which its beginning isnoted in cooling down. The former is in fact carried above Ae3 andthe latter below Ae3 by lag. I touch incidentally on the influence ofmanganese on Ae3 (§ 29, p. 614). The sections, tables, and illustrations are numbered consecutivelywith those in the accompanying papers by Howe and Levy on Deter-mination of the Position of Ae3 in Carbon-Iron Alloys, and by Bur-gess, Crowe, and Rawdon on Thermal and Microscopical Examinationof Professor Howes Standard Commercial Stee
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
