Nickel Alloy Waspaloy
GB Waspaloy · UNS N07001 · EN 2.4654, NiCr20Co13Mo4Ti3Al
Waspaloy (UNS N07001, 2.4654) is a gamma-prime precipitation-hardened Ni-Cr-Co-Mo superalloy that retains strength and creep resistance to about 800 °C.
Values for the Solution Annealed condition
Waspaloy tempers and conditions
Waspaloy is supplied in 4 conditions, soft to hard. Solution Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution AnnealedDefault solution treated (1010–1080 °C) and quenched, unaged | Mill-supplied soft condition for machining, forming and welding before final age hardening. | 520 | 930 | 45 | 24 HRC | — |
High solution 1080 °C + stabilize 845 °C/4 h + age 760 °C/16 h | Coarser-grain high-solution treatment: slightly lower RT strength but best creep-rupture life above 730 °C. | 830 | 1,280 | 22 | 34 HRC | — |
Solution treated and aged | Standard high-strength fully heat-treated condition for discs, shafts and fasteners used up to ~700 °C. | 900 | 1,350 | 24 | 36 HRC | — |
Cold drawn bar/wire, then precipitation aged | Cold-drawn small-diameter bar and wire aged for bolts and studs where extra strength and straightness are needed. | 1,000 | 1,420 | 16 | 40 HRC | — |
Supply forms, finishes and certifications
Ways Waspaloy is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Sheet ST+A | Sheet/Strip ST+A | Supply form |
What is Waspaloy?
Waspaloy (UNS N07001, 2.4654) is a gamma-prime precipitation-hardened Ni-Cr-Co-Mo superalloy that retains strength and creep resistance to about 800 °C. It is specified for turbine disks, shafts and rings and is supplied as forgings, bar and sheet in solution-annealed and solution-treated-and-aged conditions; solution-annealed material gives 520 MPa yield, 930 MPa tensile, 45% elongation and 250 HB (24 HRC). The service limit on file is 650 °C, machinability is poor (18) and weldability is limited (35) due to strain-age cracking risk. Alloy 718 is easier to weld and machine where its lower temperature capability is acceptable. Waspaloy has a density of 8.19 g/cm³ (0.296 lb/in³), lighter than 68% of nickel alloy grades. It melts at 1,330°C (2,426 °F). Waspaloy has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 76% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 211 GPa (30.6 Msi).
What is Waspaloy used for?
- Turbine disks and hubs
- Turbine blades and vanes
- Engine shafts and spacers
- Seal rings and labyrinth seals
- High-temperature bolting and fasteners
- Gas turbine casings and rings
- Hot-section exhaust hardware
Advantages
- High strength — 520 MPa (75.4 ksi), better than 76% of nickel alloy grades
Limitations
- High embodied carbon — 15.5 kg CO₂/kg, worse than 90% of nickel alloy grades
- Difficult to weld — 35/100, worse than 76% of nickel alloy grades
Waspaloy properties
Typical room-temperature values for Waspaloy-Solution Annealed; bars are the position among nickel alloy grades.
Physical3
Waspaloy has a density of 8.19 g/cm³ (0.296 lb/in³), lighter than 68% of nickel alloy grades. It melts at 1,330°C (2,426 °F).
Mechanical15
Waspaloy has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 76% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 211 GPa (30.6 Msi).
Thermal6
Waspaloy is rated for continuous service to 650°C (1,202 °F). It conducts heat at 10.7 W/m·K (6.18 BTU/hr·ft·°F), worse than 68% of nickel alloy grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
Waspaloy conducts electricity at 1.4 % IACS, worse than 65% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), worse than 66% of nickel alloy grades.
Sustainability4
Producing a kilogram of Waspaloy takes about 235 MJ of energy and emits 15.5 kg of CO₂ — more than 94% of nickel alloy grades. Typical recycled content is 35%.
Manufacturability8
Waspaloy's machinability is poor (18/100, worse than 61% of nickel alloy grades); weldability fair (35/100); formability fair (45/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the nickel alloy family
Yield strength against density for every nickel alloy grade FabDigit runs. Waspaloy is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Waspaloy
Is Waspaloy easy to machine?
Machine in the solution-annealed state where possible; rigid setups, positive-rake carbide or ceramic/whisker tools, low surface speed with heavy flood coolant, constant feed to avoid work-hardened glaze and notching.
Can Waspaloy be welded?
GTAW/EB/laser welding with matching Waspaloy or Alloy 625/263 filler on solution-annealed material only; age after welding and control restraint to avoid strain-age (post-weld heat treat) cracking.
Can Waspaloy be formed, bent or molded?
Hot work 1050–1150 °C with tight temperature control and rapid cooling; cold forming of annealed sheet needs high loads and frequent intermediate solution anneals.
Manufacturability
The process limits FabDigit's quote engine applies to Waspaloy. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Poor18 / 100 |
|---|---|
| ISO material group | S.1 |
| Cutting speed (rough / finish) | 40 / 55 m/min |
| Minimum wall | 1.5 mm |
| Minimum internal radius | 2 mm |
| Drill depth limit | 3× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Fair45 / 100 |
|---|---|
| Weldability | Better35 / 100 |
Waspaloy chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cr | 18 – 21 | 19.5 |
| Co | 12 – 15 | 13.5 |
| Mo | 3.5 – 5 | 4.3 |
| Ti | 2.75 – 3.25 | 3 |
| Al | 1.2 – 1.6 | 1.4 |
| Fe | ≤ 2 | 0.7 |
| C | 0.02 – 0.1 | 0.05 |
| Zr | 0.02 – 0.08 | 0.05 |
| B | 0 – 0.01 | 0.01 |
| Mn | ≤ 0.1 | 0.03 |
| Si | ≤ 0.15 | 0.05 |
| Cu | ≤ 0.1 | 0.02 |
| P | ≤ 0.02 | |
| S | ≤ 0.02 | |
| Nibalance, typically ~57–58 % | balance |
What surface finishes work on Waspaloy?
No anodizing; typical finishing is grinding/lapping, shot peening for fatigue life, pickling or vacuum cleaning, and optional aluminide/thermal-barrier coatings for hot-section parts.
Surface treatments FabDigit runs on nickel alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Equivalent designations
Standards and trade names that resolve to Nickel Alloy Waspaloy in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N07001
- EN / DIN / Werkstoff-Nr.
- 2.4654NiCr20Co13Mo4Ti3Al
- Also called
- Alloy Waspaloy
How much does Waspaloy cost?
Waspaloy is a premium-cost nickel alloy ($$$), pricier than about 58% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Waspaloy — frequently asked
What is Waspaloy used for?
Waspaloy is typically used for turbine disks and hubs, turbine blades and vanes, engine shafts and spacers, seal rings and labyrinth seals, high-temperature bolting and fasteners and gas turbine casings and rings. In short: disc-grade aerospace superalloy.
What is the yield strength of Waspaloy?
Waspaloy has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 76% of nickel alloy grades. Strength varies by condition: see the 4 listed tempers.
Is Waspaloy easy to machine?
Not especially — machinability is rated poor (18/100, worse than 61% of nickel alloy grades). Machine in the solution-annealed state where possible; rigid setups, positive-rake carbide or ceramic/whisker tools, low surface speed with heavy flood coolant, constant feed to avoid work-hardened glaze and notching.
Can Waspaloy be welded?
With care — weldability is rated fair (35/100). GTAW/EB/laser welding with matching Waspaloy or Alloy 625/263 filler on solution-annealed material only; age after welding and control restraint to avoid strain-age (post-weld heat treat) cracking.
What surface finishes work on Waspaloy?
No anodizing; typical finishing is grinding/lapping, shot peening for fatigue life, pickling or vacuum cleaning, and optional aluminide/thermal-barrier coatings for hot-section parts.
Can Waspaloy be formed, bent or molded?
Hot work 1050–1150 °C with tight temperature control and rapid cooling; cold forming of annealed sheet needs high loads and frequent intermediate solution anneals.
What is the maximum service temperature of Waspaloy?
Waspaloy is rated for continuous use to about 650°C (1,202 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Waspaloy Solution Annealed and Waspaloy-STA?
Solution Annealed is the default condition — mill-supplied soft condition for machining, forming and welding before final age hardening. STA: standard high-strength fully heat-treated condition for discs, shafts and fasteners used up to ~700 °C. Yield strength is 520 MPa in Solution Annealed versus 900 MPa in STA.
How much does Waspaloy cost?
Waspaloy is a premium-cost nickel alloy ($$$), pricier than about 58% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Can FabDigit make parts in Waspaloy?
Yes — Waspaloy is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- AMS 5706 / 5707 / 5708 / 5544 Waspaloy bars, forgings, rings and sheet — SAE International (2020)
- UNS N07001 designation (Metals & Alloys in the Unified Numbering System) — SAE/ASTM (2017)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Superalloys: A Technical Guide, 2nd ed. — ASM International (2002)
- Waspaloy alloy technical data — Special Metals / Haynes / Carpenter (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.