ZYTC Alloy is an ISO 9001 and AS 9120B certified superalloy manufacturer and supplier, offering AMS 5708 Waspaloy bar at factory-direct prices with full material traceability and fast global delivery. AMS 5708 specification covers a corrosion- and heat-resistant nickel alloy (Waspaloy / UNS N07001) in the form of bars, wire, forgings, flash welded rings, and stock for forging, flash welded rings, or heading. Waspaloy is a precipitation-hardening, nickel-based superalloy containing chromium and cobalt that is engineered for high-strength, high-temperature aerospace applications. It is most commonly used in aircraft fasteners and structural hardware where exceptional mechanical strength is required at temperatures up to 816°C (1500°F), along with oxidation resistance in environments reaching 954°C (1750°F). Waspaloy is produced using multiple-melt practices, typically involving vacuum induction melting (VIM) followed by either vacuum arc remelting (VAR) or electroslag remelting (ESR), resulting in a highly refined microstructure and consistent performance for critical aerospace components.
Product Forms & Availability – Waspaloy (UNS N07001 / 2.4654)Bar & Related Forms (AMS 5708 – Solution Heat Treated)| Product Form | Size Range | Condition |
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| Round Bar | Φ3mm – 500mm | Solution heat treated (1975°F) | | Wire | Various gauges | Solution heat treated | | Forgings | Custom configurations | Solution heat treated | | Flash Welded Rings | Custom diameters | Solution heat treated | | Forging Stock | Any size | Solution heat treated | | Heading Stock | Any size | Solution heat treated |
Additional Waspaloy Product Forms| Product Form | Specification | Availability |
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| Sheet & Strip | AMS 5544 | Available | | Plate | AMS 5544 | Available | | Welded Tubing | AMS 5586 | Available |
For all stock availability, contact Sales.
Specifications – Waspaloy Bar| Specification | Condition | Key Features |
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| AMS 5708 | Solution heat treated (1975°F) | Type 2 – capable of AMS 5709 properties | | AMS 5709 | Triple heat treated | Full strength condition | | AMS 5706 | Solution heat treated | Alternative specification | | AMS 5704 | Forgings | Triple heat treated | | UNS N07001 | – | Unified numbering system | | W. Nr. 2.4654 | – | German standard |
ApplicationsAerospace Fasteners: High-strength bolts, studs, nuts, and screws for elevated temperature service (heading stock for fastener manufacturing) Jet Engine Components: Turbine discs, compressor discs, shafts, spacers, seals, rings, casings Missile Components: High-temperature structural hardware for missile systems Gas Turbines: Rotor discs, blades, vanes, shafts, rings Airframe Assemblies: Structural components requiring high strength at elevated temperatures Power Generation: High-temperature components for industrial turbines
Operating Conditions & Selection CriteriaWaspaloy solution heat treated bar (AMS 5708) is specified for aerospace fasteners and structural hardware requiring exceptional mechanical strength at elevated temperatures after aging. Service Temperature Range: Retains high strength up to 816°C (1500°F) with oxidation resistance to 954°C (1750°F); recommended working temperature for rotating components up to 650°C (1200°F) Solution Treated Condition: Soft, workable state for heading, forming, forging, and machining before final aging Heading Stock: Specifically suitable for heading operations in fastener manufacturing Multiple-Melt Practices: VIM+VAR or VIM+ESR for highly refined microstructure and consistent performance Strengthening Mechanism: Age-hardened through precipitation of gamma-prime [Ni₃(Al,Ti)] during stabilization and aging Corrosion & Oxidation Resistance: Good resistance to oxidation and sulfidation to 871°C (1600°F) due to high chromium content ; non-magnetic properties Weldability: Can be welded using argon-arc methods with AMS 5828 filler metal; welding is not recommended for high-stress applications due to potential cracking
Chemical Composition| Chemical Composition (Weight %) | Waspaloy Specification |
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| Nickel (Ni) | Balance (approx. 58) | | 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 | | Carbon (C) | 0.02 - 0.10 | | Boron (B) | 0.003 - 0.010 | | Zirconium (Zr) | 0.02 - 0.12 | | Iron (Fe) | 2.0 max. | | Silicon (Si) | 0.75 max. | | Manganese (Mn) | 1.0 max. |
| Physical Properties | Metric | Imperial |
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| Density | 8.19 g/cm³ | 0.296 lb/in³ | | Modulus of Elasticity | 213 GPa | 30.9 × 10⁶ psi | | Melting Range | 1330 - 1365°C | 2425 - 2490°F | | Thermal Conductivity (600°C) | 19.1 W/m·K | 125 BTU·in/hr·ft²·°F | | Coefficient of Expansion (70-1000°F) | 14.3 µm/m·°C | 7.7 µin/in·°F |
Heat TreatmentWaspaloy in the AMS 5708 condition is supplied solution heat treated at 1975°F (1079°C) . A three-step heat treatment sequence is required to achieve full precipitation-hardened properties : | Step | Temperature | Time | Cooling | Purpose |
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| 1. Solution Heat Treat (As-Supplied) | 1079°C (1975°F) | 1-4 hours | Air cool | Soft, workable condition | | 2. Stabilization | 843°C (1550°F) | 4 hours | Air cool | Precipitate controlled carbides | | 3. Precipitation Hardening | 760°C (1400°F) | 16 hours | Air cool | Develop gamma-prime for high strength |
Contact ZYTC Alloy TodayRequest a quote for AMS 5708 / Waspaloy Bar (UNS N07001 / 2.4654) – Nickel-Based Superalloy – Solution Heat Treated – High Strength to 1,500°F . Please provide: Diameter / size Product form (bar / wire / forging / ring / heading stock / forging stock) Length or weight required Quantity Destination port Any special certification requirements
📧 Email: daisy@zytcsteel.com
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