Hangbo Alloy Group
Shanghai · Est. 2012
UNS N07001 / W.Nr. 2.4654 — Chemical composition, mechanical properties, temperature limits, and corrosion resistance data for engineers and procurement professionals.
Waspaloy (UNS N07001 / W.Nr. 2.4654) is a precipitation-hardened, nickel-cobalt-chromium-based superalloy renowned for its excellent high-temperature strength, good oxidation resistance, and outstanding creep-rupture properties up to about 870 °C. It was developed in the 1950s for gas turbine applications and remains a preferred material for rotating and structural components in aerospace and industrial gas turbines. The alloy is strengthened by a combination of solid-solution hardening (Cr, Mo, Co) and gamma-prime [Ni₃(Al, Ti)] precipitation. Waspaloy offers a balance of properties that make it suitable for highly stressed components where Inconel 718 may exceed its service temperature limit or where superior creep resistance is required.
The chemical composition of Waspaloy is carefully controlled to deliver its unique combination of mechanical strength, corrosion resistance, and high-temperature stability. Trace elements such as carbon, boron, and zirconium are tightly controlled to ensure microstructural consistency and reproducible properties.
| Element | Min % | Max % |
|---|---|---|
| Nickel (Ni) | Balance | Balance |
| Chromium (Cr) | 18.0 | 21.0 |
| Cobalt (Co) | 12.0 | 15.0 |
| Molybdenum (Mo) | 3.50 | 5.00 |
| Titanium (Ti) | 2.75 | 3.25 |
| Aluminum (Al) | 1.20 | 1.60 |
| Iron (Fe) | — | 2.0 |
| Carbon (C) | 0.02 | 0.10 |
| Boron (B) | 0.003 | 0.010 |
| Zirconium (Zr) | 0.02 | 0.08 |
| Manganese (Mn) | — | 0.10 |
| Silicon (Si) | — | 0.15 |
| Sulfur (S) | — | 0.015 |
Waspaloy exhibits a face-centered cubic (FCC) austenitic matrix. Its physical properties remain stable across the service temperature range, supporting reliable thermal and mechanical design in aerospace, nuclear, and chemical applications.
| Property | Value | Unit |
|---|---|---|
| Density | 8.19 | g/cm³ |
| Melting Point | 1330 – 1395 | °C |
| Specific Heat (21 °C) | 419 | J/kg·K |
| Thermal Conductivity (21 °C) | 11.3 | W/m·K |
| Electrical Resistivity (21 °C) | 1.25 | μΩ·m |
| Modulus of Elasticity (21 °C) | 220 | GPa |
| Mean CTE (21 – 93 °C) | 12.6 | μm/m·°C |
The mechanical properties below represent typical values for solution-treated and, where applicable, aged product forms. Actual values vary with section size, processing history, and heat treatment condition.
| Property | Value |
|---|---|
| Tensile Strength (aged) | ≥ 1275 MPa (185 ksi) |
| Yield Strength (0.2% offset, aged) | ≥ 780 MPa (113 ksi) |
| Elongation in 2 inches | ≥ 25% |
| Reduction of Area | ≥ 30% |
| Hardness (aged) | 32 – 39 HRC |
| Charpy Impact (room temp) | ≥ 30 J |
Waspaloy retains useful strength and ductility at elevated temperatures. The data below are representative of the alloy in its standard heat-treated condition and are intended for preliminary design guidance.
| Temperature (°C) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 21 | 1275 | 780 | 25 |
| 316 | 1200 | 720 | 26 |
| 427 | 1130 | 680 | 27 |
| 538 | 1050 | 630 | 28 |
| 649 | 950 | 580 | 30 |
| 760 | 800 | 520 | 32 |
| 871 | 620 | 450 | 35 |
Waspaloy offers a distinctive corrosion resistance profile that makes it suitable for demanding service environments. The specific performance characteristics depend on the alloy's chromium, molybdenum, and other alloying additions.
The combination of high-temperature strength, corrosion resistance, and structural reliability makes Waspaloy a preferred material across several critical industries:
Hangbo Alloy Group manufactures and supplies Waspaloy in the following product forms, conforming to ASTM, AMS, ASME, and other international specifications:
| Standard | Description |
|---|---|
| AMS 5544 | Sheet, Strip, and Plate |
| AMS 5708 | Bars, Forgings, and Rings |
| AMS 5828 | Welding Wire and Covered Electrodes |
| AMS 7239 | Bolts, Screws, and Studs |
| ASTM B637 | Bars, Forgings, and Rings |
| GE B50A913 | General Electric Aircraft Engine Specification |
| Rolls-Royce MSRR 7181 | Aerospace Material Specification |
| Pratt & Whitney PWA 1002 | Aerospace Material Specification |
| DIN 17742 | Werkstoff 2.4654 Specification |
| ISO 9723 | Nickel and Nickel Alloy Bar |
| NADCAP | Heat Treatment and NDT for Aerospace |
| AS9100 | Aerospace Quality Management System |
Waspaloy has a density of approximately 8.19 g/cm³, comparable to Inconel 718 and other nickel-base superalloys.
Waspaloy is a nickel-base superalloy containing 18–21% chromium, 12–15% cobalt, 3.5–5.0% molybdenum, 2.75–3.25% titanium, 1.20–1.60% aluminum, ≤2% iron, 0.02–0.10% carbon, 0.003–0.010% boron, and 0.02–0.08% zirconium.
Key standards include AMS 5544 (sheet/plate), AMS 5708 (bar/forgings/rings), AMS 5828 (welding wire), AMS 7239 (fasteners), ASTM B637, GE B50A913, Rolls-Royce MSRR 7181, and DIN 17742 / W.Nr. 2.4654.
Waspaloy is typically solution treated at 1010 – 1065 °C, stabilized at 843 – 871 °C, and aged at 760 °C for 8 hours to precipitate gamma-prime [Ni₃(Al, Ti)] for maximum strength.
Pricing is driven by cobalt, nickel, chromium, and titanium market prices, plus product form, size, heat treatment condition, aerospace certification requirements, and NDT/inspection level.
Available forms include bars, forgings, rings, sheets, plates, welding wire, electrodes, powder, investment castings, tubes, fasteners, and custom machined components.
Waspaloy can be welded but is more difficult than Inconel 718 due to strain-age cracking sensitivity. It requires careful heat control, low restraint, and matching filler AMS 5828. EBW and inertia welding are common for aerospace components.
Waspaloy has better high-temperature creep resistance and can operate up to about 870 °C, while Inconel 718 is generally limited to about 650 °C. However, Waspaloy is more expensive and harder to weld and machine.
Aerospace-grade bars and forgings typically require 8–16 weeks due to melting, forging, heat treatment, and inspection. Minimum order quantities start at 100–300 kg depending on form and specification.
Waspaloy offers good high-temperature oxidation, sulfidation, and carburization resistance up to 870 °C. It is not primarily selected for aqueous corrosion resistance but performs adequately in many industrial atmospheres.
Waspaloy is typically used for structural loads up to about 760 °C and can withstand oxidation up to 870 °C in short-term or lightly stressed applications.
Main applications include gas turbine discs, shafts, rings, casings, aerospace fasteners, combustion chambers, rocket engine components, and high-temperature petrochemical equipment.
Hangbo Alloy Group maintains extensive inventory of Waspaloy in all standard product forms. We can provide mill test certificates, third-party inspection reports (SGS, TUV, BV), and custom processing services including cutting, machining, forging, and surface finishing.
For quotations, material certifications, or technical consultation, contact our sales team or call +86-136-1165-6360. We typically respond within 10 minutes.
Request a quotation for Waspaloy round bars, tubes, plates, or forgings. We stock standard sizes and accept custom orders.
Waspaloy is a nickel-chromium-cobalt superalloy used for turbine discs, shafts, and rings in aircraft engines where high-temperature strength near 760 °C is required.
It is typically used up to about 760 °C (1400 °F) with good creep and oxidation resistance in the turbine section.
Yes. Every order ships with EN 10204 3.1 mill test certificates and can be supplied with third-party inspection (SGS, TÜV). Review our test reports & traceability process.
We supply plates & sheets, round bars, seamless tubes, forgings, and welding wire per ASTM/ASME.
Contact our sales team or call +86-136-1165-6360 for pricing and lead time — typical response within 10 minutes.
As a dedicated nickel alloy manufacturer serving aerospace, power generation sectors, Hangbo Alloy Group stocks Waspaloy (UNS N07001) across all standard product forms with full ASTM/ASME documentation and EN 10204 3.1 certification. Our material is specified for applications where corrosion resistance, high-temperature strength, and traceable quality are non-negotiable.