Alloy 722，Inconel 722 Fittings，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 Fittings (UNS N07722)** #### **Overview** **Alloy 722 Fittings** (commercially known as **Inconel® 722 Fittings**) are precision-engineered components designed for critical piping and tubing systems operating in extreme environments. These fittings leverage the exceptional properties of Alloy 722, including superior high-temperature strength retention up to 815°C (1500°F), outstanding corrosion resistance, and excellent fatigue performance. Manufactured through advanced forging, machining, and forming processes, Inconel 722 fittings maintain structural integrity and leak-proof performance in temperatures ranging from cryogenic conditions to high-temperature applications, making them essential for aerospace, oil and gas, and chemical processing industries. The unique precipitation-hardening characteristics of Alloy 722, achieved through gamma prime [γ'] phase formation, ensure that these fittings maintain their mechanical properties and dimensional stability even after prolonged exposure to aggressive service conditions. --- #### **Chemical Composition** The chemical composition of Alloy 722 Fittings (UNS N07722) conforms to strict 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 provides enhanced solid solution strengthening and precipitation hardening capability through carefully balanced aluminum and titanium ratios.* --- #### **Physical Properties** Critical properties for fitting design and system engineering: | 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 optimized 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 **Pressure Performance:** * **Maximum Working Pressure:** Varies with fitting design and size * **Temperature Rating:** Up to 815°C (1500°F) continuous service * **Burst Pressure:** Excellent resistance to pressure deformation --- #### **International Standards** Alloy 722 Fittings conform to numerous international specifications: **Dimensional Standards:** * **ASME B16.11:** Forged Fittings, Socket-Welding and Threaded * **MSS SP-79:** Socket-Welding Reducer Inserts * **MSS SP-97:** Integrally Reinforced Forged Branch Outlet Fittings **Material Standards:** * **ASTM B564:** Standard Specification for Nickel Alloy Forgings * **AMS 7858:** Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings * **ASTM B805:** Precipitation Hardening Nickel Alloy Bars, Forgings, and Forging Stock **Quality Standards:** * **ISO 9001:** Quality Management Systems * **ASME BPVC:** Boiler and Pressure Vessel Code * **NACE MR0175:** Sulfide Stress Cracking Resistance --- #### **Product Applications** Alloy 722 fittings serve critical functions across multiple high-performance industries: **Aerospace & Defense:** * **Aircraft Hydraulic Systems:** Fittings for high-pressure hydraulic lines * **Fuel Systems:** Connectors, unions, and adapters for fuel management * **Engine Systems:** Bleed air duct fittings, lubrication system components * **Spacecraft:** Propulsion system fittings, fuel line connectors **Oil & Gas Industry:** * **Downhole Tools:** Instrumentation fittings, control line connectors * **Subsea Systems:** Hydraulic fittings, chemical injection connectors * **Surface Equipment:** Wellhead fittings, Christmas tree components * **Processing Plants:** High-pressure pipeline fittings, valve connectors **Power Generation:** * **Nuclear Plants:** Primary circuit fittings, instrument connections * **Gas Turbines:** Fuel system fittings, hydraulic control connectors * **Steam Systems:** High-temperature steam line fittings * **Heat Exchangers:** Tube fittings, header connections **Industrial Processing:** * **Chemical Plants:** Corrosive fluid handling fittings * **Heat Treatment:** Furnace gas supply fittings, quenching system components * **Pharmaceutical:** High-purity process system fittings * **Marine Applications:** Corrosive marine environment fittings --- #### **Key Advantages** * **Enhanced High-Temperature Strength:** Superior mechanical properties retention up to 815°C (1500°F) * **Excellent Oxidation Resistance:** Outstanding performance in oxidizing atmospheres * **Superior Corrosion Resistance:** Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking * **Excellent Weldability:** Can be welded to similar and dissimilar materials using conventional methods * **Outstanding Fatigue Performance:** Superior resistance to vibration and pressure cycling * **Dimensional Stability:** Maintains precise tolerances under thermal cycling conditions * **Pressure Integrity:** Excellent resistance to internal and external pressure deformation * **Long Service Life:** Maintains performance in aggressive environments over extended periods **Available Fitting Types:** * **Socket Weld Fittings:** Elbows, tees, couplings, unions, caps * **Threaded Fittings:** NPT, BSPT, BSPP thread configurations * **Butt Weld Fittings:** Elbows, tees, reducers, caps, stub ends * **Special Fittings:** Crosses, laterals, barbed fittings, custom designs **Quality Assurance:** * **Material Certification:** Complete traceability and compliance documentation * **Dimensional Inspection:** 100% verification to specified standards * **Surface Examination:** Visual and liquid penetrant testing * **Pressure Testing:** Hydrostatic and pneumatic testing capabilities **Note:** *Inconel® is a registered trademark of Special Metals Corporation. Alloy 722 fittings are typically supplied in the solution treated and aged condition to meet specific application requirements. Proper installation techniques and torque specifications must be followed to ensure optimal performance and system integrity. Comprehensive certification packages including chemical analysis, mechanical properties, and non-destructive testing reports are provided for all critical applications.*

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 1801 gallon liquid totes Special package is available on request.