X24
Carbon steel (0,35%C) Normalized
![](/data/cont/docs/2468-2022-07-11-nar web.jpg)
![](/data/cont/docs/2468-2022-07-11-verd web.jpg)
![](/data/cont/docs/2468-2022-07-11-azu web20.jpg)
Composition: Carbon steel (0.35%C, hypoeutectoid).
Processing: Hot-rolled. Normalized from 870ºC (air cooling).
Etching: 10-15 s immersion in 2% nital.
This is the same steel as the one in the X19 specimen, but this one has been normalized. That is, a faster cooling was applied after annealing. This results in precipitation of ferrite at lower temperatures and in a smaller amounts. Micrographs show that primary ferrite acquires an acicular morphology (without being Widmanstätten). Pearlite shows a similar morphology to the one observed for X18 specimen, which was also normalized.
Fe-Fe3C diagram
![](/data/cont/docs/2468-2022-07-14-Fe-Fe3C11.png)
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