| Perhaps the most familiar structure in steels is that of the eutectoid pearlite, usually a lamellar mixture of ferrite and cementite. |
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| Fig.2 shows the effect of alloys on the eutectoid temperature. |
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| Silicon and aluminum increase the graphitization potential for both the eutectic and eutectoid transformations and increase the number of graphite particles. |
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| The result of this show continued growth of austenite, passing the eutectoid temperature during cooling requires a radical change. |
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| Mn also lowers the transformation temperature and the eutectoid carbon concentration. |
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| Standard rail steel has a predominantly pearlitic structure with a nearly eutectoid content of carbon and fine plates of pearlitic cementite. |
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| With this information, the cooling rate for the different thermal moduli was experimentally calculated for the temperature range of the eutectoid transformation. |
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