Alloy 718，Inconel 718 Bar(Round bar, Flat bar)，UNS N07718，EFORU

British Specs:，American Specs: AMS 5662 Bar and Forgings AMS 5663 Bar and Forgings AMS 5664 Bar and Forgings AMS 5589 Seamless Tube AMS 5590 (Tube *) AMS 5596 Sheet, Strip and Plate AMS 5597 Sheet, Strip and Plate AMS 5832 Welding Wire AMS 5914 Sheet, Strip and Foil AMS 5950 (718SPF) Sheet & Strip ASTM F3055 Powder，German Specs:

### **Product Introduction: Alloy 718 / Inconel 718 Bar (Round Bar, Flat Bar) UNS N07718** #### **Overview** **Alloy 718 Bar** (commercially known as **Inconel® 718 Bar**) represents one of the most versatile and widely used forms of this premier nickel-chromium superalloy. Available in both round bar and flat bar configurations, this product offers exceptional strength, corrosion resistance, and thermal stability up to 700°C (1300°F). The bar form is specifically engineered for machining and fabrication into critical components where reliability under extreme conditions is paramount. Inconel 718 bars maintain consistent mechanical properties and microstructural integrity throughout their cross-section, making them ideal for high-stress applications in aerospace, oil and gas, and power generation industries. The alloy's exceptional performance stems from its unique precipitation-hardening mechanism, primarily through the formation of gamma double prime (γ'') phase [Ni₃Nb], which provides outstanding strength while maintaining excellent microstructural stability during prolonged exposure to elevated temperatures. --- #### **Chemical Composition** The chemical composition of Alloy 718 Bar (UNS N07718) meets rigorous international standards: | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 50.0 - 55.0 | | **Chromium (Cr)** | 17.0 - 21.0 | | **Iron (Fe)** | Balance | | **Niobium (Nb)** | 4.75 - 5.50 | | **Molybdenum (Mo)** | 2.80 - 3.30 | | **Titanium (Ti)** | 0.65 - 1.15 | | **Aluminum (Al)** | 0.20 - 0.80 | | **Cobalt (Co)** | ≤ 1.00 | | **Carbon (C)** | ≤ 0.08 | | **Manganese (Mn)** | ≤ 0.35 | | **Silicon (Si)** | ≤ 0.35 | | **Sulfur (S)** | ≤ 0.015 | | **Copper (Cu)** | ≤ 0.30 | | **Boron (B)** | ≤ 0.006 | *The carefully balanced composition enables optimal precipitation hardening through gamma double prime [γ'' Ni₃Nb] and gamma prime [γ' Ni₃(Al,Ti)] phases during heat treatment.* --- #### **Physical Properties** These properties are essential for design and manufacturing engineering: | Property | Metric Value | Imperial Value | | :--- | :--- | :--- | | **Density** | 8.19 g/cm³ | 0.296 lb/in³ | | **Melting Range** | 1260 - 1336 °C | 2300 - 2440 °F | | **Specific Heat (20°C)** | 435 J/kg·K | 0.104 Btu/lb·°F | | **Thermal Conductivity (20°C)** | 11.4 W/m·K | 79.1 Btu·in/hr·ft²·°F | | **Thermal Expansion Coefficient (20-100°C)** | 13.0 μm/m·°C | 7.2 μin/in·°F | | **Modulus of Elasticity** | 200 GPa | 29.0 x 10⁶ psi | | **Electrical Resistivity** | 1.25 μΩ·m | - | --- #### **Mechanical Properties** Mechanical properties are achieved through specific heat treatment cycles: **Solution Annealed + Aged Condition (Per AMS 5662):** * **Ultimate Tensile Strength:** ≥ 1275 MPa (185 ksi) * **Yield Strength (0.2% Offset):** ≥ 1035 MPa (150 ksi) * **Elongation:** ≥ 12% * **Reduction of Area:** ≥ 15% * **Hardness:** 35-45 HRC **High-Temperature Capability:** * **Maximum Service Temperature:** 700°C (1300°F) * **Stress Rupture Strength:** Excellent up to 650°C (1200°F) * **Creep Resistance:** Maintains integrity under sustained load at elevated temperatures --- #### **International Standards** Alloy 718 Bar conforms to numerous international specifications: **Aerospace Material Specifications (AMS):** * **AMS 5662:** Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings * **AMS 5663:** Solution Heat Treated and Aged Condition * **AMS 5664:** Solution Heat Treated and Overaged Condition **ASTM Standards:** * **ASTM B637:** Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock * **ASTM F567:** Standard Practice for Installation of Inconel 718 Fasteners **Other International Standards:** * **ISO 9724:** Nickel and Nickel Alloy Forgings * **DIN 17752:** Wrought Nickel and Nickel Alloys - Technical Delivery Conditions * **GB/T 14992:** Chinese Standard for High Temperature Alloys --- #### **Product Applications** Alloy 718 bars serve as fundamental material for critical components across multiple industries: **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:** Shafting, rudder stocks, and other marine components * **Chemical Processing:** Reactor components, heat exchanger parts, support structures --- #### **Key Advantages** * **Excellent Machinability:** Superior machining characteristics in the annealed condition compared to other nickel-based superalloys * **Outstanding Weldability:** Minimal susceptibility to post-weld heat treatment cracking * **Superior Strength-to-Weight Ratio:** High strength maintained at elevated temperatures with relatively low density * **Exceptional Corrosion Resistance:** Excellent resistance to oxidation, carburization, and sulfidation * **Fatigue Resistance:** Superior performance under cyclic loading conditions * **Consistent Properties:** Uniform microstructure and mechanical properties throughout bar cross-section * **Versatile Fabrication:** Suitable for machining, welding, and forming operations * **Thermal Stability:** Maintains dimensional stability under thermal cycling conditions **Note:** *Inconel® is a registered trademark of Special Metals Corporation, a PCC company. Alloy 718 bars are typically supplied in solution annealed condition (980°C/1800°F) for optimum machinability, with subsequent aging treatment (718°C/1325°F for 8 hours, furnace cool to 621°C/1150°F and hold for 8-10 hours) to develop full mechanical properties. Proper material certification and traceability are maintained according to industry requirements.*

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 1782 gallon liquid totes Special package is available on request.