1.4765 | X8CrAl25-5 AlN precipitations
| Numeric designation | 1.4765 | UNS S44600 | AISI 446 |
|---|---|
| Chemical designation | 1.4765 | X8CrAl25-5 AlN |
| State | AlN precipitations |
| Etching | unetched |
The micrographs show the “heat conductor alloy” after several months of use at approx. 1050 °C. Locally, there was drastic nitrogenisation with the formation of unusually coarse aluminium nitrides.
The SEM images show a cleavage fracture surface of the coarse-grained microstructure with the nitrides.
Failure Cases
Breakage of a side cutter
1.4462 | X2CrNiMoN22-5-3 Duplex with sigma phase
1.6580 | 30CrNiMo8 +N + QT Forging crack
EN AC-43500 | AlSi10MnMg Cold run and hot crack
1.0503 | C45 Incorrect induction hardened
EN-GJS-500-7 | 5.3200 | Tool life problems in machining
CuAl8 solder on S235JR, liquid metal induced stress corrosion cracking
1.4571 | X6CrNiMoTi17-12-2 Fatigue Corrosion Cracking
1.7225 | 42CrMo4 Quasi-gap fracture