Alloy 722，Inconel 722 Sheet，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 Sheet (UNS N07722)** #### **Overview** **Alloy 722 Sheet** (commercially known as **Inconel® 722 Sheet**) is a high-performance nickel-chromium superalloy supplied in thin, flat-rolled form, offering an exceptional combination of high-temperature strength, outstanding corrosion resistance, and excellent fabricability. This precipitation-hardenable material maintains superior mechanical properties from cryogenic temperatures up to 815°C (1500°F), making it particularly suitable for formed, stamped, and fabricated components in demanding aerospace, energy, and chemical processing applications. The sheet product undergoes precision rolling and controlled heat treatment processes to ensure consistent gauge control, superior surface quality, and reliable performance in extreme environments. The alloy's enhanced characteristics are achieved through a sophisticated precipitation-hardening mechanism involving gamma prime [γ'] phase formation, providing exceptional microstructural stability and retention of mechanical properties after prolonged exposure to high temperatures. --- #### **Chemical Composition** The chemical composition of Alloy 722 Sheet (UNS N07722) is carefully balanced for optimal performance: | 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 sheet metal design and fabrication: | 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 Condition (Formable):** * **Tensile Strength:** 1000-1150 MPa (145-167 ksi) * **Yield Strength:** 650-800 MPa (94-116 ksi) * **Elongation:** 20-30% **Precipitation Hardened Condition:** * **Tensile Strength:** 1300-1450 MPa (188-210 ksi) * **Yield Strength:** 1100-1250 MPa (160-181 ksi) * **Elongation:** 12-20% * **Hardness:** 38-44 HRC --- #### **International Standards** Alloy 722 Sheet conforms to several international specifications: **Aerospace Material Specifications:** * **AMS 5596:** Sheet, Strip, and Plate * **AMS 5597:** Solution Heat Treated and Aged Condition **ASTM Standards:** * **ASTM B670:** Plate, Sheet, and Strip for High-Temperature Service * **ASTM B906:** General Requirements for Flat-Rolled Nickel and Nickel Alloys **Other International Standards:** * **ISO 6208:** Nickel and nickel alloy sheets * **DIN 17750:** Nickel and nickel alloy sheets - Technical delivery conditions * **GB/T 2054:** Chinese standard for nickel and nickel alloy sheets --- #### **Product Applications** Alloy 722 sheets serve critical functions across multiple high-performance industries: **Aerospace & Defense:** * **Aircraft Structures:** Engine cowlings, heat shields, firewall components * **Spacecraft Systems:** Satellite skins, rocket fairings, thermal protection systems * **Missile Components:** Casing sections, control surfaces, structural panels * **Engine Components:** Combustor liners, exhaust components **Oil & Gas Industry:** * **Pressure Vessels:** Liner sheets, head components, separator internals * **Heat Exchangers:** Plate-type heat exchanger components * **Process Equipment:** Reactor linings, distillation column internals * **Subsea Components:** Pressure housings, protective covers **Power Generation:** * **Gas Turbines:** Combustor liners, transition ducts, heat shields * **Nuclear Applications:** Containment liners, shielding components * **Heat Recovery Systems:** Ducting, expansion joint components * **Boiler Components:** Casing sections, insulation supports **Industrial Applications:** * **Chemical Processing:** Reaction vessel linings, pickling baskets, furnace parts * **Heat Treatment:** Retorts, muffles, radiant tubes, furnace belts * **Marine Engineering:** Exhaust systems, stack liners, marine component fabrication * **Medical Equipment:** High-temperature processing equipment --- #### **Key Advantages** * **Excellent Formability:** Can be deep drawn, stretch formed, and spun in annealed condition * **Enhanced High-Temperature Strength:** Superior mechanical properties retention up to 815°C (1500°F) * **Superior Corrosion Resistance:** Excellent resistance to oxidation, carburization, and sulfidation * **Good Weldability:** Can be welded using conventional methods (TIG, MIG, resistance) * **Excellent Fatigue Performance:** Superior resistance to vibration and thermal cycling * **Cryogenic Toughness:** Maintains ductility and impact strength at cryogenic temperatures * **Surface Quality:** Available with various surface finishes (2B, polished, pickled) * **Dimensional Consistency:** Tight thickness tolerances and flatness standards **Available Forms & Sizes:** * **Thickness Range:** 0.5mm to 6.0mm (0.020" to 0.236") * **Width Range:** Up to 1500mm (60") * **Length Range:** Up to 3000mm (118") * **Surface Finishes:** 2B, BA, polished, pickled, or custom finishes **Heat Treatment Specifications:** * **Solution Treatment:** 1100-1150°C (2010-2100°F) followed by rapid cooling * **Aging Treatment:** 730-760°C (1350-1400°F) for 8-16 hours, air cool * **Stress Relieving:** Available for formed components **Quality Assurance:** * **Dimensional Verification:** Thickness, width, and flatness inspection * **Surface Quality:** Visual and instrumental surface examination * **Mechanical Testing:** Tensile, hardness, and bend testing * **Chemical Analysis:** Complete composition verification **Note:** *Inconel® is a registered trademark of Special Metals Corporation. Alloy 722 sheet is typically supplied in the solution annealed condition for optimum formability, with subsequent aging treatment to develop full mechanical properties. The material demonstrates good weldability but requires proper post-weld heat treatment to restore properties in the heat-affected zone. Proper handling and storage in controlled environments are essential to prevent surface damage and contamination. Comprehensive material certification is 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 1799 gallon liquid totes Special package is available on request.