Alloy 718，Inconel 718 Sheet，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 Sheet (UNS N07718)** #### **Overview** **Alloy 718 Sheet** (commercially known as **Inconel® 718 Sheet**) is a high-performance nickel-chromium superalloy supplied in thin, flat-rolled form, combining exceptional strength with outstanding corrosion resistance across a wide temperature spectrum. This precipitation-hardenable material maintains excellent mechanical properties from cryogenic conditions up to 700°C (1300°F), making it particularly suitable for formed, stamped, and fabricated components in demanding environments. The sheet product undergoes precise rolling and heat treatment processes to ensure consistent gauge control, superior surface quality, and reliable performance in critical aerospace, chemical processing, and energy applications. The alloy's remarkable properties are achieved through a unique age-hardening mechanism involving the precipitation of gamma double prime (γ'') phase [Ni₃Nb], which provides high strength while maintaining excellent microstructural stability during extended exposure to elevated temperatures. --- #### **Chemical Composition** The chemical composition of Alloy 718 Sheet (UNS N07718) meets stringent 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 controlled precipitation hardening through gamma double prime [γ'' Ni₃Nb] and gamma prime [γ' Ni₃(Al,Ti)] phases during heat treatment.* --- #### **Physical Properties** Critical properties for sheet metal design and fabrication: | 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 vary with thickness and heat treatment condition: **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:** 35-42 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 Sheet conforms to numerous 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 sheets * **DIN 17750:** Nickel and nickel alloy sheets - Technical delivery conditions * **GB/T 2054:** Chinese standard for nickel and nickel alloy sheets --- #### **Product Applications** Alloy 718 sheets serve critical functions across multiple high-performance industries: **Aerospace & Defense:** * **Aircraft Structures:** Engine cowlings, heat shields, firewall components * **Spacecraft Systems:** Satellite skins, rocket fairings, thermal protection systems * **Missile Components:** Casing sections, control surfaces, structural panels **Oil & Gas Industry:** * **Pressure Vessels:** Liner sheets, head components, separator internals * **Heat Exchangers:** Plate-type heat exchanger components * **Process Equipment:** Reactor linings, distillation column internals **Power Generation:** * **Gas Turbines:** Combustor liners, transition ducts, heat shields * **Nuclear Applications:** Containment liners, shielding components * **Heat Recovery Systems:** Ducting, expansion joint components **Industrial Applications:** * **Chemical Processing:** Reaction vessel linings, pickling baskets, furnace parts * **Heat Treatment:** Retorts, muffles, radiant tubes * **Marine Engineering:** Exhaust systems, stack liners, marine component fabrication --- #### **Key Advantages** * **Excellent Formability:** Can be deep drawn, stretch formed, and spun in annealed condition * **Superior Strength-to-Weight Ratio:** High strength maintained in thin sheet configurations * **Outstanding Corrosion Resistance:** Excellent resistance to oxidation, carburization, and sulfidation * **Good Weldability:** Can be welded using conventional methods (TIG, MIG, resistance) * **Excellent Fatigue Performance:** Superior resistance to vibration and thermal cycling * **Cryogenic Toughness:** Maintains ductility and impact strength at cryogenic temperatures * **Surface Quality:** Available with various surface finishes (2B, polished, pickled) * **Dimensional Consistency:** Tight thickness tolerances and flatness standards **Note:** *Inconel® is a registered trademark of Special Metals Corporation, a PCC company. Alloy 718 sheet is typically supplied in solution annealed condition for optimum formability, with subsequent aging treatment to develop full mechanical properties. Available in thicknesses from 0.1mm to 6mm (0.004" to 0.250"), with widths up to 1500mm (60"). Proper handling and storage are essential to prevent surface damage and contamination.*

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 1786 gallon liquid totes Special package is available on request.