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10/07/2025

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06/07/2025

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Iron-Iron Carbide Phase Diagram

The important boundaries (the lines) separating phases have some universally used abbreviations:

A1: The upper limit of the ferrite / cementite phase field (horizontal line going through the eutectoid point).
A2: The temperature where iron looses its magnetism (so-called Curie temperature). Note that for pure iron this is still in the α-phase.
A3: The boundary between the γ austenite and the austenite/ ferrite field.
A4: The point in this case where α changes to δ at high temperatures
ACM: The boundary between the γ austenite and the austenite / cementite field.

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31/12/2022

Good day happy new year 2023🎇🎆

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