IRON & CARBON STEEL ETCHANTS
Please use the table below to select the correct etchant for your steel.
| Type of Steel: | Etchant to Use: |
| Carbon steels and mild steels in general | Nital |
| Cast irons & tool steels (most) | Nital |
| Carburized or heat-treated carbon steels | First Picral then Nital |
| Others | See this list |
| Microstructures of Steel: | |
| Both ferrite grains and carbides | First Picral then Nital |
| General alloy segregation, carbide networks and grain-boundary of carbides, Bainite | Picral |
| As-quenched martensite, Ferrite grains and ferrite grain boundaries | Nital |
| Martensite, tempered | First Picral then Nital |
| Pearlite | Nital or Picral |
| Prior-austenite grains | Prior-austenite grain boundaries etch |
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