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Nb521
Nb521 alloy (Nb-5W-2Mo-1Zr) has a melting point close to about 2600°C, and its tensile strength ranges from 420MPa to 480MPa in the M state and 650Mpa to 760Mpa in the Y state. Mainly used for aerospace engine nozzles.
Chemical composition of Nb521 (mass fraction)
| Grade | Chemical Composition / % | |||
| Nb | W | Mo | Zr | |
| Nb521 | Balance | 4.7~5.5 | 1.7~2.5 | 0.7~1.2 |