Alloy 718，Inconel 718 Plate，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 Plate (UNS N07718)** #### **Overview** **Alloy 718 Plate** (commercially known as **Inconel® 718 Plate**) is a premium nickel-chromium superalloy supplied in plate form, offering exceptional strength and corrosion resistance across a wide temperature range. This precipitation-hardenable material maintains outstanding mechanical properties from cryogenic temperatures up to 700°C (1300°F), making it ideal for structural applications in extreme environments. The plate product is manufactured through controlled thermo-mechanical processing to ensure uniform grain structure and consistent properties throughout the entire thickness, providing reliable performance in the most demanding aerospace, oil and gas, and power generation applications. The alloy's superior characteristics stem from its unique age-hardening mechanism through the precipitation of coherent body-centered tetragonal gamma double prime (γ'') phase [Ni₃Nb], which delivers exceptional strength while maintaining excellent microstructural stability during prolonged high-temperature exposure. --- #### **Chemical Composition** The chemical composition of Alloy 718 Plate (UNS N07718) conforms to 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 structural design and fabrication 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 5596):** * **Ultimate Tensile Strength:** ≥ 1275 MPa (185 ksi) * **Yield Strength (0.2% Offset):** ≥ 1035 MPa (150 ksi) * **Elongation:** ≥ 12% * **Hardness:** 35-45 HRC **Elevated Temperature Performance:** * **Maximum Service Temperature:** 700°C (1300°F) * **Creep Resistance:** Excellent up to 650°C (1200°F) * **Oxidation Resistance:** Good up to 980°C (1800°F) for short periods --- #### **International Standards** Alloy 718 Plate is manufactured according to several international specifications: **Aerospace Material Specifications (AMS):** * **AMS 5596:** Sheet, Strip, and Plate * **AMS 5597:** Solution Heat Treated and Aged Sheet, Strip, and Plate * **AMS 5598:** Solution Heat Treated and Overaged Sheet, Strip, and Plate **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 plates * **DIN 17750:** Nickel and nickel alloy plates - Technical delivery conditions * **GB/T 2054:** Chinese standard for nickel and nickel alloy plates --- #### **Product Applications** Alloy 718 plates serve as fundamental material for critical components across multiple industries: **Aerospace & Defense:** * **Aircraft Structures:** Engine mounts, fuselage components, wing attachments * **Rocket Components:** Motor cases, thrust structures, interstage sections * **Satellite Systems:** Structural platforms, mounting plates, support frames **Oil & Gas Industry:** * **Pressure Vessels:** Reactor vessels, separator components * **Wellhead Equipment:** Flanges, valve bodies, Christmas tree components * **Subsea Structures:** Manifold bases, template components, support frames **Power Generation:** * **Gas Turbine Components:** Casing sections, support rings, mounting plates * **Nuclear Applications:** Core support structures, shielding components * **Heat Exchangers:** Header plates, support plates, baffle components **Industrial Applications:** * **Chemical Processing:** Reactor vessels, distillation column internals * **Heat Treatment:** Furnace fixtures, hearth plates, radiant tubes * **Marine Engineering:** Hull components for corrosive service, deck plates --- #### **Key Advantages** * **Exceptional Strength:** Maintains high mechanical properties at elevated temperatures * **Superior Corrosion Resistance:** Excellent resistance to oxidation, carburization, and sulfidation * **Excellent Weldability:** Can be welded using conventional methods with minimal post-weld heat treatment cracking * **Outstanding Fatigue Resistance:** Superior performance under cyclic loading conditions * **Good Fabricability:** Can be machined, formed, and welded using standard industrial equipment * **Cryogenic Toughness:** Maintains excellent impact properties at cryogenic temperatures * **Uniform Properties:** Consistent mechanical properties throughout the plate thickness * **Thermal Stability:** Maintains dimensional stability under thermal cycling conditions **Note:** *Inconel® is a registered trademark of Special Metals Corporation, a PCC company. Alloy 718 plate is typically supplied in solution annealed condition for optimum formability, 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. Available in thicknesses from 3mm to 150mm (0.125" to 6"), with custom sizes and heat treatment conditions available to meet specific application 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 1785 gallon liquid totes Special package is available on request.