Alloy 722，Inconel 722 Strip，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 Strip (UNS N07722)** #### **Overview** **Alloy 722 Strip** (commercially known as **Inconel® 722 Strip**) is a precision-rolled nickel-chromium superalloy supplied in thin, narrow coil form, specifically engineered for applications requiring exceptional high-temperature strength, superior corrosion resistance, and precise dimensional tolerances. This precipitation-hardenable material maintains outstanding mechanical properties from cryogenic conditions up to 815°C (1500°F), making it ideal for high-precision components in aerospace, electronics, and specialized industrial applications. The strip product undergoes sophisticated cold rolling and controlled heat treatment processes to achieve exact gauge control, superior surface finish, and consistent mechanical properties essential for demanding applications. The alloy's enhanced characteristics are achieved through a sophisticated precipitation-hardening mechanism involving gamma prime [γ'] phase formation, providing exceptional microstructural stability and property retention in extreme environments. --- #### **Chemical Composition** The chemical composition of Alloy 722 Strip (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 precision component design and manufacturing: | 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 tailored for strip applications: **Annealed Condition (Formable):** * **Tensile Strength:** 950-1100 MPa (138-160 ksi) * **Yield Strength:** 600-750 MPa (87-109 ksi) * **Elongation:** 25-35% **Precipitation Hardened Condition:** * **Tensile Strength:** 1250-1400 MPa (181-203 ksi) * **Yield Strength:** 1050-1200 MPa (152-174 ksi) * **Elongation:** 15-25% * **Hardness:** 36-42 HRC * **Flatness:** ≤ 1% of strip width --- #### **International Standards** Alloy 722 Strip 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 strip * **DIN 17750:** Nickel and nickel alloy strip - Technical delivery conditions * **GB/T 2054:** Chinese standard for nickel and nickel alloy strip --- #### **Product Applications** Alloy 722 strip serves critical functions in precision component manufacturing: **Aerospace & Defense:** * **Spring Components:** High-temperature springs, bellows, flexures * **Sealing Elements:** Gaskets, seal strips, thermal barriers * **Instrumentation:** Sensor components, diaphragm elements * **Fastening Systems:** Lock washers, retaining rings, special fasteners **Electronics & Electrical:** * **Connector Components:** High-rel electrical contacts, socket elements * **Spring Contacts:** Test socket springs, battery contacts * **Lead Frames:** High-temperature semiconductor packaging * **Shielding Components:** EMI/RFI shielding elements **Industrial Manufacturing:** * **Precision Springs:** Valve springs, instrument springs, mechanism springs * **Medical Devices:** Surgical instrument components, implantable devices * **Automotive:** High-temperature sensor components, turbocharger parts * **Tooling:** Precision fixtures and specialized tool components **Energy Sector:** * **Fuel Cell Components:** Bipolar plates, stack components * **Turbine Components:** Seal strips, shim elements, spacer strips * **Nuclear Applications:** Instrumentation components, control elements --- #### **Key Advantages** * **Precision Gauge Control:** Exceptional thickness consistency (±0.005mm) * **Enhanced High-Temperature Strength:** Superior mechanical properties retention up to 815°C (1500°F) * **Superior Surface Quality:** Various finishes available (2B, BA, polished) * **Excellent Formability:** Suitable for stamping, bending, and deep drawing * **Outstanding Spring Properties:** High yield strength and elastic modulus * **Superior Corrosion Resistance:** Excellent performance in oxidizing and reducing environments * **Thermal Stability:** Maintains properties and dimensions at elevated temperatures * **Fatigue Resistance:** Superior performance under cyclic loading conditions **Available Forms & Sizes:** * **Thickness Range:** 0.05mm to 2.0mm (0.002" to 0.080") * **Width Range:** 2mm to 600mm (0.080" to 24") * **Coil Weights:** Standard and custom coil sizes available * **Temper Conditions:** Annealed, 1/4 hard, 1/2 hard, full hard, aged **Processing Capabilities:** * **Precision Slitting:** Tight width tolerances (±0.025mm) * **Edge Conditioning:** Round, square, or custom edge profiles * **Surface Treatment:** Passivation, cleaning, special coatings * **Heat Treatment:** Precise thermal processing for property optimization **Quality Assurance:** * **Dimensional Verification:** 100% thickness and width monitoring * **Surface Inspection:** Visual and automated surface quality control * **Mechanical Testing:** Tensile, hardness, and spring property testing * **Microstructural Analysis:** Grain size and phase distribution control **Note:** *Inconel® is a registered trademark of Special Metals Corporation. Alloy 722 strip is typically supplied in the annealed condition for optimum formability, with subsequent aging treatment to develop full mechanical properties. Special processing including precision slitting, edge conditioning, and specific heat treatments are available to meet exact application requirements. Proper handling and storage in controlled environments are recommended to maintain surface quality and performance characteristics. Comprehensive certification packages 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 1800 gallon liquid totes Special package is available on request.