Waspaloy Age Hardenable Nickel Alloy (UNS N07001),1

### **Product Datasheet: Waspaloy® (UNS N07001)** **A Versatile, Age-Hardenable Nickel-Based Superalloy for High-Temperature Applications** --- #### **1. Overview** **Waspaloy** (pronounced *Wasp-a-loy*) is a premier, age-hardenable nickel-based superalloy renowned for its excellent combination of high tensile strength, creep resistance, and oxidation resistance at temperatures up to **980°C (1800°F)**. It exhibits good fabricability and is one of the most widely used superalloys for critical components in gas turbine engines. Its key advantage lies in its balanced properties, offering high strength without the processing complexities of some more advanced alloys. Waspaloy is typically supplied in the solution-annealed condition, which allows for machining and forming, and is subsequently age-hardened to achieve its peak mechanical properties. #### **2. Chemical Composition (Typical Weight %)** The composition is designed to create a stable microstructure with a significant volume fraction of the strengthening gamma prime (γ') phase. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Forms the austenitic (FCC) matrix. | | **Chromium (Cr)** | ~19.5 | Provides excellent oxidation and hot corrosion resistance. | | **Cobalt (Co)** | ~13.5 | Solid solution strengthener. | | **Molybdenum (Mo)** | ~4.3 | Potent solid solution strengthener. | | **Aluminum (Al)** | ~1.4 | Forms the primary strengthening γ' phase (Ni₃(Al,Ti)). | | **Titanium (Ti)** | ~3.0 | Forms the primary strengthening γ' phase (Ni₃(Al,Ti)). | | **Carbon (C)** | ~0.07 | Forms carbides (e.g., M₂₃C₆) for grain boundary strength. | | **Boron (B)** | ~0.006 | Enhances creep life and grain boundary strength. | | **Zirconium (Zr)** | ~0.05 | Further improves creep resistance. | | **Iron (Fe)** | ≤ 1.0 | Residual element. | #### **3. Physical Properties (Typical)** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.22 g/cm³ (0.297 lb/in³) | | **Melting Range** | ~1330 - 1360 °C (~2425 - 2480 °F) | | **Thermal Expansion Coefficient** | ~13.9 μm/m·°C (20 - 540°C) | | **Thermal Conductivity** | ~12.0 W/m·K (at 100°C) | | **Modulus of Elasticity** | ~206 GPa (30 x 10⁶ psi) at 20°C | #### **4. Mechanical Properties** Properties are developed through a solution treatment followed by a two-stage aging process. The following are typical for bar stock in the fully heat-treated condition (per AMS 5708). **At Room Temperature:** * **Tensile Strength:** > 1200 MPa (175 ksi) * **Yield Strength (0.2% Offset):** > 795 MPa (115 ksi) * **Elongation:** > 15% * **Reduction of Area:** > 18% **At Elevated Temperature (e.g., 730°C / 1350°F):** * **Tensile Strength:** ~795 MPa (115 ksi) * **Yield Strength (0.2% Offset):** ~690 MPa (100 ksi) * **Creep-Rupture Strength:** Excellent, capable of withstanding high stresses for extended periods, making it ideal for turbine disk applications. #### **5. Heat Treatment** A standard heat treatment cycle for Waspaloy is as follows: 1. **Solution Treatment:** Heat to 1080°C (1975°F), hold, then rapidly cool (quench in oil or forced air). This dissolves the γ' forming elements into the matrix. 2. **Stabilization:** A step at 845°C (1550°F) is sometimes used to precipitate certain carbides. 3. **Aging Treatment:** A two-stage aging process (e.g., 760°C / 1400°F for 4-8 hours, then 650°C / 1200°F for 16-24 hours) is used to precipitate a fine, uniform distribution of the γ' phase. #### **6. Product Applications** Waspaloy is a workhorse alloy in the aerospace and power generation industries, used in: * **Gas Turbine Engine Components:** Turbine disks, compressor disks, shafts, spacers, and rotating seals. * **Turbine Blades and Vanes** (especially in later stages). * **High-Temperature Fasteners,** bolts, and nuts. * **Industrial Gas Turbine (IGT)** components. * **Afterburner Parts.** #### **7. International and Industry Standards** Waspaloy is covered by a wide range of international and proprietary specifications. * **UNS:** **N07001** * **Werkstoff Nr.:** **2.4654** * **AMS (Aerospace Material Specification):** * **AMS 5708:** Bars, Forgings, and Rings (Age Hardened) * **AMS 5544:** Sheet, Strip, and Plate (Solution Treated) * **AMS 5732:** Corrosion and Heat-Resistant Wire (Age Hardened) * **ASTM:** B637 (Standard Specification for Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock for High-Temperature Service) --- **Disclaimer:** The information provided is typical and for reference purposes only. Mechanical properties are highly dependent on section size, heat treatment parameters, and manufacturing process. For design and procurement, the applicable material specification (e.g., AMS 5708) and the manufacturer's technical data must be consulted. Waspaloy is a registered trademark of United Technologies Corp. (now Raytheon Technologies).

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3367 gallon liquid totes Special package is available on request.