. Transactions. d. Fig. 4.—Microstrxtctuee of Steel No. IV., Per Cent, of Carbon, Per Cent, of Manganese, Heated to 900°, and Cooled inVarious designation letters A, B, D, and E, refer to the treatments representedbv ordinates A, B, D, and E of Figs. 2 and All X 500. Etched with picric acid. 534 DIVORCING ANNEALING. tions in the conditions may cause unexpected and at first sigttanomalous changes in the mechanical properties. One consideration we cannot escape, that the influence ofthese cementite masses is clearly strengthening and embrittling^because the mass as a whole

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. Transactions. d. Fig. 4.—Microstrxtctuee of Steel No. IV., Per Cent, of Carbon, Per Cent, of Manganese, Heated to 900°, and Cooled inVarious designation letters A, B, D, and E, refer to the treatments representedbv ordinates A, B, D, and E of Figs. 2 and All X 500. Etched with picric acid. 534 DIVORCING ANNEALING. tions in the conditions may cause unexpected and at first sigttanomalous changes in the mechanical properties. One consideration we cannot escape, that the influence ofthese cementite masses is clearly strengthening and embrittling^because the mass as a whole remains stronger, with a higherclastic limit and less ductility than those of a lower carbonsteel in which the quantity of cementite is far less or even our natural inference is that the balling up of the cemen-tite as such should tend to increase the ductility, and to lessenthe tenacity and the elastic limit, because in whatever way thecementite exerts its strengthening and embrittling effect, we.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries