1.7076 | 32CrB4 +QT (12.9) Prior austenite grain boundaries
| Numeric designation | 1.7076 |
|---|---|
| Chemical designation | 32CrB4 |
| State | +QT (12.9) Prior austenite grain boundaries |
| Etching | PAG HT |
The highly tempered screw material was successfully etched onto former austenite grain boundaries using “PAG HT”. The copper precipitate is polished off on a stationary, wet OPS disc (ChemTec). Depending on the alloy, 25% ammonia and a cotton swab are required to remove the copper precipitate.
Parameters:
- Etchant PAG HT (made by Schmitz)
- 3 min
- room temperature
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Fe-Base
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1.5507 | 23MnB3 +QT (11.9) Prior austenite grain boundaries