According to Boynton this constituent is sorbite in the case of steels containing more than ·8 per cent. carbon, for if troostite be β iron free from carbon it cannot exist in hyper-eutectoid steels.1905, Professional Papers of the Corps of Royal Engineers, volume 30, page 217:
After a very long period of annealing their morphology is very similar to the carbides precipitated in the sorbite and, as regards the amount of precipitate, the ferritic grains are almost indiscernible from the sorbitic (Fig.3).1962, The Journal of the Iron and Steel Institute, volume 200, page 940:
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Some consider granular pearlite or granular cementite to be sorbite. Hence it is also called sorbitic pearlite, and when referring to the contained carbon, sorbitic carbide.1962, J. W. Mellor, A Comprehensive Treatise on Inorganic and Theoretical Chemistry, volume 12, page 847:
Sorbite is isomeric with mannite and dulcite, and forms with oxalic acid at 75° sorbite-formamide, with evolution of carbonic anhydride. It is a colourless odourless syrup.1881, “Abstracts of Chemical Papers: Sorbin and Sorbite”, in Journal of the Chemical Society, volume 11, page 148: