Alloy 718，Inconel 718 Strip，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 Strip (UNS N07718)** #### **Overview** **Alloy 718 Strip** (commercially known as **Inconel® 718 Strip**) is a precision-rolled nickel-chromium superalloy supplied in thin, narrow coil form, offering an exceptional combination of high strength, excellent corrosion resistance, and outstanding thermal stability. This precipitation-hardenable material is specifically engineered for applications requiring precise dimensional tolerances, superior surface finish, and consistent mechanical properties across the entire strip length and width. The strip product undergoes sophisticated cold rolling and controlled heat treatment processes to achieve the exact gauge control and metallurgical properties needed for high-precision components in aerospace, electronics, and specialized industrial applications. The alloy's superior performance characteristics are derived from its unique age-hardening mechanism through the precipitation of gamma double prime (γ'') phase [Ni₃Nb], which provides exceptional strength while maintaining excellent microstructural stability during prolonged exposure to elevated temperatures up to 700°C (1300°F). --- #### **Chemical Composition** The chemical composition of Alloy 718 Strip (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 precisely controlled composition enables optimal precipitation hardening through gamma double prime [γ'' Ni₃Nb] and gamma prime [γ' Ni₃(Al,Ti)] phases during thermal processing.* --- #### **Physical Properties** Critical properties for precision component design and manufacturing: | 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 tailored through specific thermal processing: **Solution Annealed + Aged Condition (Typical):** * **Ultimate Tensile Strength:** 1240-1380 MPa (180-200 ksi) * **Yield Strength (0.2% Offset):** 1030-1170 MPa (150-170 ksi) * **Elongation:** 15-25% * **Hardness:** 35-42 HRC * **Flatness:** ≤ 1% of strip width **Temperature Performance:** * **Continuous Service:** Up to 700°C (1300°F) * **Short-term Exposure:** Up to 800°C (1470°F) * **Cryogenic Service:** Down to -253°C (-423°F) --- #### **International Standards** Alloy 718 Strip complies with major international specifications: **Aerospace Material Specifications:** * **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 Standards:** * **ISO 6208:** Nickel and nickel alloy strip * **DIN 17750:** Nickel and nickel alloy strip - Technical delivery conditions * **GB/T 2054:** Chinese standard for nickel and nickel alloy strip --- #### **Product Applications** Alloy 718 strip serves critical functions in precision component manufacturing: **Aerospace & Defense:** * **Spring Components:** High-temperature springs, bellows, flexures * **Sealing Elements:** Gaskets, seal strips, thermal barriers * **Instrumentation:** Sensor components, diaphragm elements * **Fastening Systems:** Lock washers, retaining rings, special fasteners **Electronics & Electrical:** * **Connector Components:** High-rel electrical contacts, socket elements * **Spring Contacts:** Test socket springs, battery contacts * **Lead Frames:** High-temperature semiconductor packaging **Industrial Manufacturing:** * **Precision Springs:** Valve springs, instrument springs, mechanism springs * **Medical Devices:** Surgical instrument components, implantable devices * **Automotive:** High-temperature sensor components, turbocharger parts **Energy Sector:** * **Fuel Cell Components:** Bipolar plates, stack components * **Turbine Components:** Seal strips, shim elements, spacer strips * **Nuclear Applications:** Instrumentation components, control elements --- #### **Key Advantages** * **Precision Gauge Control:** Exceptional thickness consistency (±0.005mm) * **Superior Surface Quality:** Various finishes available (2B, BA, polished) * **Excellent Formability:** Suitable for stamping, bending, and deep drawing * **Outstanding Spring Properties:** High yield strength and elastic modulus * **Corrosion Resistance:** Excellent performance in oxidizing and reducing environments * **Thermal Stability:** Maintains properties and dimensions at elevated temperatures * **Fatigue Resistance:** Superior performance under cyclic loading conditions * **Consistent Properties:** Uniform mechanical characteristics throughout coil length **Note:** *Inconel® is a registered trademark of Special Metals Corporation. Alloy 718 strip is typically supplied in thicknesses from 0.05mm to 2.0mm (0.002" to 0.080") and widths from 2mm to 600mm (0.080" to 24"). Special processing including precision slitting, edge conditioning, and specific heat treatments are available to meet exact application requirements. Proper handling and storage in controlled environments are recommended to maintain surface quality and performance characteristics.*

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 1787 gallon liquid totes Special package is available on request.