Waspaloy, UNS N07001, is a gamma prime strengthened nickel superalloy with cobalt and molybdenum, developed for rotating turbine hardware. It retains strength and creep resistance to roughly 1600F, above the useful range of alloy 718.
It is used for turbine discs, shafts, seals, rings and high temperature fasteners in both aero and industrial gas turbines. Because gamma prime precipitates quickly, welding requires care and is normally done in the solution treated condition.
Stocked as bar, billet and forgings with full heat traceability, supplied solution treated or solution treated and aged.
Sizes and stock
- Round bar: up to 6" DIA
- Sheet / plate: up to 0.75" THK
Processing capabilities
- Billet conversion and open die, closed die and ring forging
- Solution treat, age and anneal to the applicable spec
- Saw cutting, trepanning, gun drilling and CNC machining
- Ultrasonic, penetrant dye, micrography and physical testing
Cold reduced material per AMS 5708 available up to 3" DIA.
Specifications
Material is released to the applicable specification with mill test reports and, on request, independent lab verification.
Why engineers specify Waspaloy
- High strength and creep resistance to about 1600F
- Proven material for turbine discs and shafts
- Good oxidation resistance
- Available as billet for forging conversion
Nominal chemistry
Percent by weight, nominal composition per the governing specification. The mill test report for your heat is the controlling document.
Typical mechanical properties
| Condition | Tensile strength | Yield strength | Elongation | Hardness |
|---|---|---|---|---|
| Solution treated | ~130 ksi | ~70 ksi | ~35% | - |
| Solution treated and aged | 170 ksi min | 115 ksi min | 15% min | - |
Typical published values for reference only, not for design. Properties vary with section size, product form and processing. Order to the specification and condition your drawing requires.
Typical applications
- Turbine discs and shafts
- Seals and rings
- High temperature fasteners
- Industrial gas turbine rotating hardware
Fabrication notes
Machining
Nickel and cobalt superalloys work harden aggressively. Use rigid setups, sharp tooling, slow speeds, positive feed that stays under the hardened skin, and flood coolant. Age hardened material machines far more slowly than solution treated material, so rough before aging wherever the print allows.
Welding
Most solid solution grades weld readily with matching filler. Age hardenable grades such as 718 and Waspaloy are welded in the solution treated condition and aged afterward to control strain age cracking.
Forming
Hot working ranges are narrow and forces are high. Cold form in the annealed condition with intermediate anneals, and stress relieve before final heat treatment.
Waspaloy compared with similar grades
Alloy 718
Easier to weld and lower cost, limited to about 1300F.
Rene 41
Higher strength at temperature, more difficult to fabricate.
Designations and cross reference
- Material family
- Nickel & Cobalt Alloys
- UNS number
- N07001
- Werkstoff (W.Nr)
- 2.4654
- EN designation
- — (use W-Nr)
- ASTM
- B637 (bar/forgings)
- AMS by form
- 5706/5708/5709 (bar/forgings), 5544 (sheet), 5828 (wire)
Working from an obsolete, foreign or superseded designation? Send it over and we will cross reference it to a current grade and specification.
Quality, testing and traceability
Supplied with mill test reports and heat traceability, with ultrasonic inspection, penetrant dye, micrography, grain size, stress rupture and mechanical testing available on request.
We are AS9100D and ISO 9001:2015 registered. If our stock does not already carry the inspection your specification requires, we can quote the material with that work performed. More on our quality system
Available forms
Custom sizes converted from billet, plus saw cut, waterjet and near-net blanks. See custom conversions
Waspaloy frequently asked questions
What is Waspaloy?
Waspaloy, UNS N07001, is a gamma prime strengthened nickel superalloy with cobalt and molybdenum, developed for rotating turbine hardware. It retains strength and creep resistance to roughly 1600F, above the useful range of alloy 718.
What forms is Waspaloy available in?
We supply Waspaloy in bar, sheet, plate. Custom sizes are converted from billet, and we can provide saw cut, waterjet or near net blanks so material arrives closer to your finished part.
What is the UNS or equivalent designation for Waspaloy?
Waspaloy is designated UNS N07001, Werkstoff 2.4654, EN — (use W-Nr). If your drawing calls out an obsolete or foreign designation we can cross reference it and confirm the equivalent before you order.
What specifications can Waspaloy be supplied to?
Commonly ordered specifications include AMS 5544, AMS 5706, AMS 5707, AMS 5708, AMS 5709, AMS 5828. Material is released to the specification and condition on your purchase order, with mill test reports supplied as standard.
What conditions can Waspaloy be ordered in?
We can supply Solution treated, Solution treated and aged. If our stock is not already in the condition you need, we can quote it with the heat treatment performed before shipment.
Can you cut Waspaloy to size?
Yes. Saw cutting, waterjet, laser and shearing are available, along with trepanning, gun drilling, lathe turning and CNC machining, so you can order blanks or rough machined pieces rather than full lengths.
Do you provide test reports and additional testing on Waspaloy?
Every order ships with mill test reports and heat traceability. If your print calls for ultrasonic inspection, penetrant dye, magnetic particle, chemical assay, micrography, hardness or mechanical testing and our stock does not already carry it, we can quote the material with that work performed.
Can Waspaloy be supplied to DFARS domestic melt requirements?
Tell us at quote stage if the order is DFARS or domestic melt restricted and we will confirm availability against that requirement before you commit.
What do you need to quote Waspaloy?
Grade, form, dimensions, quantity, specification and condition, plus any testing or certification requirements and the date you need it. Send a drawing if you have one. Quotes are typically ready within 24 hours.
How does Waspaloy compare with Alloy 718?
Easier to weld and lower cost, limited to about 1300F.