Turbine discs and shafts
Rotating aero-engine components requiring high strength and creep resistance to around 760 °C.
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Waspaloy round bar
An age-hardening nickel alloy for turbine discs, shafts and hot-section fasteners, strengthened by a heat treatment in three stages rather than by work. It holds its strength and resists creep to around 760 °C.
- Grade / purity
- Waspaloy, UNS N07001
- Standard
- SAE AMS 5709J
- Form
- Round bar, Ø 11 mm × 6000 mm
Applications
Fasteners, rings and seals
Bolts, casing rings and seal components in hot-section assemblies where relaxation resistance matters.
Land-based turbines and tooling
Power-generation rotor parts and hot-work tooling operating under high stress at elevated temperature.
Specification
| Product | Waspaloy Round Bar (bright, hot-worked) |
|---|---|
| Material grade | Waspaloy |
| UNS designation | UNS N07001 |
| Governing standard | SAE AMS 5709J |
| Melting method | VIM + ESR (double melt) |
| Supply condition | Solution + stabilization + precipitation heat-treated |
| Dimension | Ø 11 mm (tol. +0.406 / −0) × 6000 mm |
| Element | Spec (%) | Actual (%) | Element | Spec (%) | Actual (%) |
|---|---|---|---|---|---|
| C | 0.02 – 0.10 | 0.043 | Mn | 0.10 max | 0.015 |
| Si | 0.15 max | 0.02 | P | 0.015 max | 0.0071 |
| S | 0.015 max | <0.0020 | Cr | 18.00 – 21.00 | 19.30 |
| Co | 12.00 – 15.00 | 13.51 | Mo | 3.50 – 5.00 | 4.24 |
| Ti | 2.75 – 3.25 | 2.92 | Al | 1.20 – 1.60 | 1.51 |
| Zr | 0.02 – 0.08 | 0.031 | B | 0.003 – 0.010 | 0.0039 |
| Fe | 2.00 max | 1.05 | Cu | 0.10 max | 0.013 |
| Pb | 0.0005 max | <0.0001 | Bi | 0.00003 max | <0.00001 |
| Se | 0.0003 max | <0.0001 | Ni | Balance | Rem. |
| Heat treatment | 1) Solution 1080 °C / 4 h / air cool 2) Stabilization 843 °C / 4 h / air cool 3) Precipitation 760 °C / 16 h / air cool |
|---|---|
| Delivery hardness | 37 HRC |
| Stress-rupture at 816 °C | Stress 328 MPa · Life 26.37 h · Elongation 43 % |
| Grain-size uniformity | Qualified |
| Visual / dimensional inspection | Qualified |
| Ultrasonic inspection | Qualified |
