Alloy 718，Inconel 718 Rod，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 Rod (UNS N07718)** #### **Overview** **Alloy 718 Rod** (commercially known as **Inconel® 718 Rod**) is a premium precipitation-hardenable nickel-chromium alloy supplied in rod form, renowned for its exceptional strength and corrosion resistance at elevated temperatures. As one of the most versatile and widely used superalloy products, Inconel 718 rod offers outstanding mechanical properties, excellent fabricability, and superior performance in extreme environments. The rod form is particularly valued for its consistency in microstructure and mechanical properties, making it ideal for machining critical components across aerospace, oil and gas, and power generation industries. The alloy derives its exceptional properties from a unique age-hardening mechanism through the precipitation of coherent body-centered tetragonal gamma double prime (γ'') phase [Ni₃Nb], which provides high strength while maintaining good structural stability up to 700°C (1300°F). --- #### **Chemical Composition** The chemical composition of Alloy 718 Rod (UNS N07718) conforms to strict 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 optimized composition enables precipitation hardening through gamma double prime [γ'' Ni₃Nb] and gamma prime [γ' Ni₃(Al,Ti)] phases during heat treatment.* --- #### **Physical Properties** These properties are critical 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 developed 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 HRC **High-Temperature Performance:** * **Continuous Service Temperature:** Up to 700°C (1300°F) * **Stress Rupture Strength:** Excellent up to 650°C (1200°F) * **Creep Resistance:** Maintains properties under sustained load at high temperatures --- #### **International Standards** Alloy 718 Rod is manufactured according to several 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 Rod serves as fundamental material for critical components across industries: **Aerospace & Defense:** * **Engine Components:** Turbine blades, disks, shafts, and fasteners * **Rocket Systems:** Turbopump parts, thrust chamber components * **Structural Parts:** Airframe components, landing gear parts **Oil & Gas Industry:** * **Downhole Tools:** Drill collars, subs, mandrels, and hangers * **Wellhead Equipment:** Valves, stems, seals, and pressure-containing parts * **Subsea Components:** Connectors, Christmas tree parts **Power Generation:** * **Gas Turbine Parts:** Blades, disks, and shafts * **Nuclear Components:** Core internals, fastening systems * **Steam Turbine Parts:** High-temperature sections and fasteners **Industrial Applications:** * **Fasteners:** High-strength bolts, studs, nuts, and screws * **Machined Components:** Pump shafts, valve stems, and bearing housings * **Tooling:** High-temperature fixtures and processing equipment --- #### **Key Advantages** * **Superior Machinability:** Better machining characteristics compared to other nickel-based superalloys in the annealed condition * **Excellent Weldability:** Demonstrates good weldability with minimal post-weld heat treatment cracking tendency * **Outstanding Strength-to-Weight Ratio:** High strength maintained at elevated temperatures with relatively low density * **Corrosion Resistance:** Excellent resistance to oxidation, carburization, and sulfidation in aggressive environments * **Fatigue Resistance:** Superior performance under cyclic loading conditions * **Consistent Properties:** Uniform microstructure and mechanical properties throughout the rod cross-section * **Versatile Heat Treatment:** Responsive to various aging treatments for tailored mechanical properties **Note:** *Inconel® is a registered trademark of Special Metals Corporation, a PCC company. Alloy 718 rod is typically supplied in solution annealed condition for optimum machinability, with subsequent aging treatment (718°C for 8 hours, furnace cool to 621°C and hold for 8-10 hours) to develop full mechanical properties. Proper storage and handling are essential to prevent surface contamination and damage.*

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 1781 gallon liquid totes Special package is available on request.