It solidifies at - 21° C. (Quincke) to a dark brown solid.
It is a yellow-coloured liquid which solidifies at o° C., and fumes on exposure to air.
As the melting point of the metal is gradually raised by the progressive decarburization, it at length passes above the temperature of the furnace, about 1400° C., with the consequence that the metal, now below its melting point, solidifies in pasty grains, or " comes to nature."
This ebb continues, and, combined with the progressive narrowing of the molten lake as more and more of it solidifies and joins the shore layers, gives rise to the pipe, a cavity like an inverted pear, as shown at C in fig.
I) solidifies, its carbon may form cementite following the cementite-austenite diagram so that white, i.e.