Alloy 722，Inconel 722 Bar(Round bar, Flat bar)，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 Bar (Round Bar, Flat Bar) UNS N07722** #### **Overview** **Alloy 722 Bar** (commercially known as **Inconel® 722 Bar**) is a high-performance nickel-chromium superalloy available in both round bar and flat bar configurations, specifically engineered for applications demanding exceptional strength and corrosion resistance at elevated temperatures. This precipitation-hardenable alloy maintains outstanding mechanical properties from cryogenic conditions up to 815°C (1500°F), offering superior performance in extreme environments where conventional materials would fail. The bar products are manufactured through controlled thermo-mechanical processing and precise heat treatments to ensure uniform microstructure, consistent mechanical properties, and reliable performance in critical aerospace, energy, and chemical processing 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 retention of mechanical properties after prolonged exposure to high temperatures. --- #### **Chemical Composition** The chemical composition of Alloy 722 Bar (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 design and manufacturing 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 **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 Bar conforms to several international specifications: **Aerospace Material Specifications:** * **AMS 7858:** 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 B670:** Plate, Sheet, and Strip (for flat bar products) **Other International Standards:** * **ISO 9724:** Nickel and Nickel Alloy Forgings * **DIN 17752:** Wrought Nickel and Nickel Alloys * **GB/T 14992:** Chinese Standard for High Temperature Alloys --- #### **Product Applications** **Round Bar Applications:** * **Aerospace:** Turbine shafts, engine mounts, landing gear components * **Oil & Gas:** Drill collars, valve stems, pump shafts, wellhead components * **Power Generation:** Turbine blades, generator shafts, nuclear reactor components * **General Engineering:** High-strength fasteners, precision shafts, hydraulic components **Flat Bar Applications:** * **Structural Components:** Support brackets, machine frames, structural reinforcements * **Tooling:** Fixtures, jigs, and molds for high-temperature processing * **Marine Engineering:** Shafting, rudder stocks, and marine components * **Chemical Processing:** Reactor components, heat exchanger parts, support structures **Specialized Applications:** * **Fastener Manufacturing:** High-temperature bolts, studs, and special threaded components * **Machined Components:** Pump shafts, valve bodies, bearing housings * **Welding Applications:** Base material for fabrication of high-temperature equipment --- #### **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 sulfidation and corrosive media * **Improved Microstructural Stability:** Enhanced resistance to phase transformation at high temperatures * **Good Machinability:** Better machining characteristics compared to other high-temperature superalloys * **Excellent Creep Rupture Strength:** Superior long-term performance under stress at elevated temperatures * **Thermal Fatigue Resistance:** Excellent resistance to thermal cycling damage * **Versatile Fabrication:** Suitable for machining, welding, and forming operations **Available Forms & Sizes:** * **Round Bar Diameters:** 5mm to 400mm (0.187" to 16") * **Flat Bar Sizes:** Thickness 5mm to 150mm (0.187" to 6"), Width up to 600mm (24") * **Surface Conditions:** Hot finished, turned, ground, or precision machined **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 * **Double Aging:** Optional second aging at 650-680°C (1200-1250°F) for enhanced properties **Note:** *Inconel® is a registered trademark of Special Metals Corporation. Alloy 722 bars are typically supplied in the solution annealed condition for optimum machinability and formability, with subsequent aging treatment to develop full mechanical properties. The alloy demonstrates good weldability but requires proper post-weld heat treatment to restore properties in the heat-affected zone. Comprehensive material certification including chemical analysis, mechanical properties, and non-destructive testing reports are provided for 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 1795 gallon liquid totes Special package is available on request.