Alloy 722，Inconel 722 Forgings，UNS N07722，EFORU

British Specs:，American Specs:AMS 5541 Sheet and Strip AMS 5714 Bar and Forgings，German Specs:

### **Product Introduction: Alloy 722 / Inconel 722 Forgings (UNS N07722)** #### **Overview** **Alloy 722 Forgings** (commercially known as **Inconel® 722 Forgings**) represent the highest quality form of this advanced nickel-chromium superalloy, specifically engineered for the most demanding applications in extreme environments. The forging process significantly enhances the alloy's grain structure, mechanical properties, and metallurgical integrity throughout the component. Inconel 722 forgings deliver exceptional strength, outstanding fatigue resistance, and superior creep rupture properties at temperatures up to 815°C (1500°F), making them indispensable for critical rotating and structural components across aerospace, power generation, and oil and gas industries. The combination of specialized forging techniques and the alloy's unique precipitation-hardening capability through gamma prime [γ'] phase formation results in components with optimized grain flow, improved ductility, and enhanced resistance to crack propagation, ensuring reliable performance in safety-critical applications. --- #### **Chemical Composition** The chemical composition of Alloy 722 Forgings (UNS N07722) meets rigorous international standards: | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 45.0 - 50.0 | | **Chromium (Cr)** | 14.0 - 17.0 | | **Iron (Fe)** | Balance | | **Molybdenum (Mo)** | 6.0 - 8.0 | | **Niobium (Nb)** | 1.5 - 2.5 | | **Titanium (Ti)** | 2.0 - 3.0 | | **Aluminum (Al)** | 1.0 - 1.8 | | **Cobalt (Co)** | ≤ 1.00 | | **Carbon (C)** | ≤ 0.08 | | **Manganese (Mn)** | ≤ 0.50 | | **Silicon (Si)** | ≤ 0.50 | | **Sulfur (S)** | ≤ 0.015 | | **Copper (Cu)** | ≤ 0.30 | | **Boron (B)** | 0.003 - 0.010 | *The optimized composition enables superior precipitation hardening response through gamma prime [γ'] phase formation during controlled heat treatment cycles.* --- #### **Physical Properties** Critical properties for forged component design and performance: | Property | Metric Value | Imperial Value | | :--- | :--- | :--- | | **Density** | 8.10 g/cm³ | 0.292 lb/in³ | | **Melting Range** | 1350 - 1400 °C | 2460 - 2550 °F | | **Specific Heat (20°C)** | 440 J/kg·K | 0.105 Btu/lb·°F | | **Thermal Conductivity (20°C)** | 12.0 W/m·K | 83.3 Btu·in/hr·ft²·°F | | **Thermal Expansion Coefficient (20-100°C)** | 12.5 μm/m·°C | 6.9 μin/in·°F | | **Modulus of Elasticity** | 210 GPa | 30.5 x 10⁶ psi | | **Electrical Resistivity** | 1.20 μΩ·m | - | --- #### **Mechanical Properties** Enhanced mechanical properties achieved through controlled forging and heat treatment: **Solution Annealed + Aged Condition:** * **Ultimate Tensile Strength:** 1300-1450 MPa (188-210 ksi) * **Yield Strength (0.2% Offset):** 1100-1250 MPa (160-181 ksi) * **Elongation:** 12-20% * **Reduction of Area:** 15-25% * **Hardness:** 38-46 HRC **Elevated Temperature Performance:** * **0.2% Yield Strength at 650°C (1200°F):** ≥ 950 MPa (138 ksi) * **Stress Rupture Life at 730°C (1350°F):** ≥ 100 hours at 310 MPa (45 ksi) * **Creep Resistance:** Excellent up to 815°C (1500°F) --- #### **International Standards** Alloy 722 Forgings comply with stringent international specifications: **Aerospace Material Specifications:** * **AMS 7858:** Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings * **AMS 7859:** Solution Heat Treated and Aged Condition **ASTM Standards:** * **ASTM B637:** Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock * **ASTM B564:** Standard Specification for Nickel Alloy Forgings **Quality & Testing Standards:** * **AMS 2269:** Chemical Check Analysis Limits * **ASTM E112:** Grain Size Determination * **ASTM A388:** Ultrasonic Examination of Heavy Steel Forgings --- #### **Product Applications** Alloy 722 forgings serve in the most critical applications across industries: **Aerospace & Defense:** * **Gas Turbine Engines:** Turbine disks, compressor disks, shafts, blades, and spacers * **Rocket Systems:** Turbopump components, thrust chambers, nozzle parts * **Aircraft Structures:** Landing gear components, engine mounts, wing fittings * **Spacecraft:** Critical structural components and propulsion elements **Oil & Gas Industry:** * **Downhole Tools:** Drill collars, subs, hangers, and mandrels * **Wellhead Equipment:** Valve bodies, flanges, Christmas tree components * **Subsea Systems:** Connectors, manifold blocks, pressure housings * **Surface Equipment:** High-pressure valve components and fittings **Power Generation:** * **Gas Turbines:** Rotor disks, blade rings, shaft components * **Nuclear Plants:** Reactor core components, control rod mechanisms * **Steam Turbines:** High-pressure rotor sections, valve stems * **Hydrogen Turbines:** Compressor components and rotor parts **Industrial Applications:** * **Chemical Processing:** Reactor vessels, agitator shafts, valve bodies * **Marine Engineering:** Propeller shafts, submarine components * **High-Temperature Fasteners:** Large bolts, studs, and special fasteners * **Special Machinery:** High-stress components for industrial equipment --- #### **Key Advantages** * **Superior Grain Structure:** Refined, uniform grain size with optimized grain flow * **Enhanced Mechanical Properties:** Improved strength, ductility, and toughness compared to cast products * **Excellent Fatigue Resistance:** Superior performance under cyclic loading conditions * **Improved Reliability:** Reduced incidence of internal defects and improved structural integrity * **Superior Stress Rupture Properties:** Enhanced creep and stress rupture life at elevated temperatures * **Better Microstructural Control:** Controlled precipitation and phase distribution * **Optimized Grain Flow:** Grain structure aligned with component stress patterns * **Reduced Anisotropy:** More uniform properties in all directions **Forging Capabilities:** * **Open Die Forgings:** Large, complex shapes and custom configurations * **Closed Die Forgings:** Precision forgings with minimal machining requirements * **Ring Rolled Forgings:** Large diameter rings for rotational components * **Press Forgings:** High-tonnage press forgings for critical components **Quality Assurance:** * **Ultrasonic Testing:** Full component scanning for internal defects * **Chemical Analysis:** Complete composition verification * **Mechanical Testing:** Tensile, impact, and hardness testing * **Microstructural Examination:** Grain size and phase distribution analysis * **Dimensional Inspection:** Comprehensive measurement and verification **Note:** *Inconel® is a registered trademark of Special Metals Corporation. Alloy 722 forgings are typically supplied in the solution treated and aged condition (STA) with comprehensive certification including chemical analysis, mechanical properties, microstructural examination, and non-destructive testing reports. Special quality requirements such as enhanced ultrasonic testing, grain size control, and specific heat treatment protocols are available to meet unique application demands. Proper machining and handling procedures are essential to maintain the integrity of these high-performance components.*

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 1802 gallon liquid totes Special package is available on request.