Nickel Alloy Waspaloy · heat-treated state · default condition
Nickel Alloy Waspaloy Solution Annealed
Properties of the Solution Annealed condition, compared with the other Waspaloy tempers.
Mill-supplied soft condition for machining, forming and welding before final age hardening.
What is Waspaloy Solution Annealed?
Waspaloy Solution Annealed is Waspaloy heat treated to Solution Annealed — mill-supplied soft condition for machining, forming and welding before final age hardening. Waspaloy Solution Annealed has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 77% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 211 GPa (30.6 Msi). Waspaloy Solution Annealed has a density of 8.19 g/cm³ (0.296 lb/in³), lighter than 67% of nickel alloy grades. It melts at 1,330°C (2,426 °F).
Advantages
- High strength — 520 MPa (75.4 ksi), better than 77% 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 77% of nickel alloy grades
Waspaloy Solution Annealed properties
Typical room-temperature values for Waspaloy Solution Annealed — 12 properties are specific to this condition; the rest are grade-level values shared by every Waspaloy temper. Each bar shows where the value sits among the nickel alloy grades in FabDigit's library — further right is higher.
Physical3
Waspaloy Solution Annealed has a density of 8.19 g/cm³ (0.296 lb/in³), lighter than 67% of nickel alloy grades. It melts at 1,330°C (2,426 °F).
Mechanical15
Waspaloy Solution Annealed has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 77% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 211 GPa (30.6 Msi).
Thermal6
Waspaloy Solution Annealed 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 Solution Annealed conducts electricity at 1.4 % IACS, worse than 66% 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 Solution Annealed 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 Solution Annealed's machinability is poor (18/100, worse than 62% 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.
Other Waspaloy tempers and conditions
Waspaloy is also supplied in 4 other conditions. The full side-by-side table is on the Waspaloy overview.
- Solution AnnealedDefaultMill-supplied soft condition for machining, forming and welding before final age hardening.520 MPa yield · 24 HRC
- CD+ACold-drawn small-diameter bar and wire aged for bolts and studs where extra strength and straightness are needed.1,000 MPa yield · 40 HRC
- STAStandard high-strength fully heat-treated condition for discs, shafts and fasteners used up to ~700 °C.900 MPa yield · 36 HRC
- STA-HSCoarser-grain high-solution treatment: slightly lower RT strength but best creep-rupture life above 730 °C.830 MPa yield · 34 HRC
Working with Waspaloy Solution Annealed
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.
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.
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 | — |
Waspaloy Solution Annealed — frequently asked
What is Waspaloy Solution Annealed used for?
Waspaloy Solution Annealed 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 Solution Annealed?
Waspaloy Solution Annealed has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 930 MPa (135 ksi) — stronger than 77% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Waspaloy Solution Annealed easy to machine?
Not especially — machinability is rated poor (18/100, worse than 62% 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 Solution Annealed 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 Solution Annealed?
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 Solution Annealed 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 Solution Annealed?
Waspaloy Solution Annealed 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.
Can FabDigit make parts in Waspaloy Solution Annealed?
Yes — Waspaloy Solution Annealed 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.