Nickel alloys
Waspaloy
Named alloy identity; UNS does not by itself specify product form, condition, or certificate acceptance.
Identity / state reference
What distinguishes this material
Age-hardenable nickel superalloy; VIM/VAR and VIM/ESR routes and subsequent heat treatment are specified for the application. Rotating-part duty and general hot service are different cases.
- Designation in this reference
- UNS N07001
- Forms covered by the sources
- Bar / rod and other mill forms: verify availability and specification in the linked bulletin
- States to distinguish or confirm
- Solution-treated
- stabilized / aged to purchase specification
- Temperature and exposure
- A service-temperature statement is not an allowable stress or a guarantee at temperature. Use the specified product condition and exposure duration.
Other search names in these sources
N07001 · Waspaloy
Read the scope above: a source’s related product name is not a blanket interchangeability statement.
Machining Waspaloy
Waspaloy is difficult to machine. Its producer directs readers to machining guidance separately from the alloy identity bulletin. Start with the supplied heat-treatment condition and the operation: a grade name alone does not determine a cutting speed. [1]
Solution-treated or aged?
A 2025 Waspaloy turning study compared solution-treated and age-hardened specimens, two grain sizes, and conventional versus high-pressure coolant. In those tests, higher coolant pressure reduced cutting forces and flank wear; material condition also affected the results. This supports checking condition and coolant together, rather than assigning one machinability percentage to every Waspaloy workpiece. [2]
| Factor | What was tested |
|---|---|
| Operation | Traverse disc turning; the results are not drilling or milling trials. |
| Tool | Uncoated carbide TCMW16T304-H13A, 0.4 mm nose radius, without a chipbreaker. |
| Coolant | 6 bar and 80 bar with the study's stated emulsion and delivery arrangement. |
| Transfer to another job | Check the paper's full cutting conditions before comparison. The pressures and tool above describe the experiment, not a setup recommendation. |
Prepare an operation-specific starting point
- Record the stock: copy UNS N07001, product form, treatment and available hardness from the certificate. Keep an unknown condition visible.
- Define the cut: specify turning, milling or drilling, roughing or finishing, interruptions, stock allowance and the required finish.
- Match the actual tooling: obtain the tool maker's data for the complete grade, geometry and workpiece condition. A matching insert shape does not establish suitable cutting data.
- Record the trial: keep speed, feed, depth, coolant arrangement and tool-wear observations together. Compare results for the same operation and condition.
For a milling or drilling job, select recommendations for that operation rather than transferring the turning experiment. Once a suitable cutting speed has been established, use the speed converter to calculate spindle rpm for the actual cutting diameter.
Machining sources
Machining section reviewed 7 November 2026. The material identity review below retains its own date.
- Special Metals — Waspaloy, SMC-011, September 2004, p. 3 ↗. Producer assessment of machining difficulty; no universal cutting-speed table is supplied there.
- Suárez et al. — Machinability of Waspaloy: an investigation of cutting forces and tool wear in turning, 2025 ↗. Experimental procedures §2.2 and results §3; supports only the tested operation, material states and tooling conditions.
Property evidence for a stated condition
No condition-specific numerical table is reproduced here
The linked sources establish the identity and the stated product/state scope. Obtain the row for your actual form, section, treatment and test conditions before adopting strength, hardness or a thermal limit.
Resolve these conditions next
- Which product form and governing purchase specification are on the certificate?
- What heat treatment, cold work and test temperature apply to this lot?
For machining, take the exact grade, supplied condition and measured hardness where applicable into the tool maker’s application data. A generic material-family speed is not a substitute for an operation and tool-specific recommendation.
Sources and what they establish
Reviewed 23 October 2026. A source’s publication date and the review date are different. The scope below identifies the fields checked.
Special Metals: Waspaloy technical bulletin
Grade identity, product forms, treatment distinctions; published property tables remain specific to the conditions stated in the bulletin.
Special Metals: Waspaloy technical bulletin ↗Source identity, a named product example and a supplied-batch certificate are different evidence. Cross-standard similarity does not approve substitution.
Corrections from the previous article
- Replace the old blanket 760 °C service claim with application-specific time, stress and treatment requirements.
- Remove unsupported legacy machining percentages and generic cutting-speed tables.
Other references in Nickel alloys
Related references, not equivalent substitutes.