Nickelvac W-722 Nickel Superalloy,UNS N07722; AMS 5714,E FORU

### **Product Introduction: Nickelvac® W-722 Nickel-Based Superalloy (UNS N07722 / AMS 5714)** **Nickelvac W-722** is a precipitation-hardenable, nickel-chromium-molybdenum-niobium superalloy known for its exceptional combination of high strength, excellent corrosion resistance, and outstanding manufacturability. It is a versatile alloy designed to retain its mechanical properties and resist degradation in a wide range of severe environments, including high-temperature applications and aggressive chemical media. Developed to address the limitations of earlier alloys, W-722 offers superior strength and thermal stability compared to alloys like Alloy 718, especially at temperatures above 1200°F (650°C). Its excellent fabricability and weldability make it a preferred choice for complex components in the aerospace, chemical processing, and oil & gas industries. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of Nickelvac W-722 per AMS 5714 and other relevant specifications is as follows: | Element | Content (%) | Element | Content (%) | | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | **Molybdenum (Mo)** | 2.50 - 3.50 | | **Chromium (Cr)** | 20.50 - 23.00 | **Niobium (Nb)** | 0.75 - 1.25 | | **Iron (Fe)** | 17.00 - 20.00 | **Titanium (Ti)** | 0.75 - 1.25 | | **Cobalt (Co)** | ≤ 1.00* | **Aluminum (Al)** | 0.30 - 0.70 | | **Carbon (C)** | ≤ 0.08 | **Silicon (Si)** | ≤ 0.50 | | **Manganese (Mn)**| ≤ 0.50 | **Sulfur (S)** | ≤ 0.015 | | **Phosphorus (P)**| ≤ 0.025 | **Boron (B)** | 0.003 - 0.010 | *Cobalt is typically controlled to a low level, but specific customer or application requirements may vary. **Key Microstructure:** The alloy's high strength is achieved through precipitation hardening. The primary strengthening phase is the gamma prime (γ') phase, [Ni₃(Al, Ti)], and the gamma double prime (γ'') phase, [Ni₃Nb], which are precipitated during a controlled aging heat treatment. --- #### **2. Physical Properties** Typical physical properties for W-722 alloy are provided below. | Property | Metric Units | Imperial Units | | :--- | :--- | :--- | | **Density** | 8.09 g/cm³ | 0.292 lb/in³ | | **Melting Range** | ~1370 - 1430 °C | ~2500 - 2610 °F | | **Specific Heat (20°C)** | 420 J/kg·K | 0.10 Btu/lb·°F | | **Thermal Conductivity (20°C)** | 10.8 W/m·K | 75 Btu·in/hr·ft²·°F | | **Mean Coefficient of Thermal Expansion (20-100°C)** | 12.6 μm/m·°C | 7.0 μin/in·°F | | **Electrical Resistivity** | 1.18 μΩ·m | - | | **Modulus of Elasticity (Tensile)** | 206 GPa | 30 x 10⁶ psi | --- #### **3. Mechanical Properties (Typical for AMS 5714)** Mechanical properties are achieved through a specific heat treatment cycle, typically solution annealing followed by a double aging process. **Heat Treatment:** * **Solution Treat:** 1700°F - 1850°F (927°C - 1010°C), followed by rapid cooling. * **Aging:** Double aging at intermediate temperatures (e.g., 1300°F-1500°F / 704°C-816°C range). **Typical Room Temperature Properties (After Full Heat Treatment):** | Property | Value (Typical) | | :--- | :--- | | **Tensile Strength** | 1400 MPa (203 ksi) min | | **Yield Strength (0.2% Offset)** | 1035 MPa (150 ksi) min | | **Elongation (in 4D)** | 15% min | | **Reduction of Area** | 20% min | *Note: These are minimum values per AMS 5714; actual properties can be higher depending on the specific processing route.* --- #### **4. International Standards & Specifications** Nickelvac W-722 is covered by several international and industry-specific standards, ensuring consistency and quality for global procurement. * **UNS:** N07722 * **AMS:** **AMS 5714** (The primary aerospace material specification for bars, forgings, and rings) * **ASTM:** B637 (Standard Specification for Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock for High-Temperature Service) * **AECMA:** PREN 2.4662 (European standard) * **ISO:** Not as widely standardized as UNS/AMS, but often supplied to equivalent proprietary or customer specifications. --- #### **5. Product Applications** Nickelvac W-722 is engineered for demanding applications where strength, corrosion resistance, and thermal stability are critical. Its primary applications include: * **Aerospace & Gas Turbines:** * Turbine discs and rotors * Engine shafts * Compressor components * Bolts, fasteners, and critical structural parts * Casings and rings * **Oil & Gas Industry:** * Downhole wellhead components * High-strength valves and stems * Subsea equipment for sour service (H₂S environments) * Tooling for deep-well and high-pressure/high-temperature (HPHT) applications. * **Chemical Process Industry:** * Reactor vessels and heat exchangers * Pumps and shafts for corrosive media * Fasteners and components exposed to chlorides and other aggressive chemicals. --- #### **Summary of Key Advantages** * **High Strength:** Excellent tensile, yield, and creep-rupture strength at elevated temperatures. * **Good Corrosion Resistance:** Resists oxidation, carburization, and a variety of aqueous corrosives. * **Superior Thermal Stability:** Maintains properties for long durations at temperatures up to ~1300°F (700°C). * **Excellent Fabricability:** Can be forged, machined, and welded using standard techniques for high-performance nickel alloys. **Disclaimer:** The information provided here is for reference purposes. Specific properties and performance are dependent on the manufacturing process, heat treatment, and final product form. For critical applications, always consult the official material specifications and the alloy producer's data sheets.

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 3126 gallon liquid totes Special package is available on request.