INCONEL 718SPF™ Nickel Superalloy,INCONEL alloy 718SPF ，1

### **Product Introduction: INCONEL® 718SPF™ Nickel Superalloy** **INCONEL® 718SPF™** is a specialized variant of the renowned INCONEL 718 alloy, specifically engineered for **SuperPlastic Forming (SPF)** applications. This advanced nickel-chromium alloy retains the excellent mechanical properties, corrosion resistance, and high-temperature strength of standard INCONEL 718, while featuring a fine-grained microstructure that enables exceptional formability at elevated temperatures. The alloy is particularly designed for manufacturing complex, net-shape components in the aerospace and defense industries through superplastic forming processes. The "SPF" designation indicates the alloy's capability to undergo extensive plastic deformation at specific temperatures and strain rates, allowing for the production of intricate geometries that would be impossible or cost-prohibitive with conventional manufacturing methods. --- ### **Chemical Composition** | 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)** | 1.0 max | | **Carbon (C)** | 0.08 max | | **Manganese (Mn)** | 0.35 max | | **Silicon (Si)** | 0.35 max | | **Copper (Cu)** | 0.30 max | --- ### **Physical Properties** | Property | Value | |----------|-------| | **Density** | 8.19 g/cm³ | | **Melting Point** | 1260 - 1336 °C | | **Thermal Conductivity** | 11.4 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.25 μΩ·m | | **Modulus of Elasticity** | 200 GPa | | **Coefficient of Thermal Expansion** | 13.0 μm/m·°C (20-100°C) | | **Specific Heat Capacity** | 435 J/kg·K | | **Magnetic Response** | Essentially non-magnetic | --- ### **Mechanical Properties** **Superplastic Forming Condition:** - **Forming Temperature:** 925 - 955 °C - **Strain Rate Sensitivity (m-value):** >0.5 - **Maximum Elongation:** 200 - 500% **Heat Treated Condition (After SPF):** - **Tensile Strength:** 1310 MPa - **Yield Strength (0.2% Offset):** 1100 MPa - **Elongation:** 20% - **Hardness:** 36 - 44 HRC --- ### **Key Characteristics & Advantages** 1. **Superplastic Forming Capability** - Excellent superplastic behavior at 925-955°C - High strain rate sensitivity index (m-value > 0.5) - Capable of complex shape formation with minimal springback 2. **Enhanced Microstructural Control** - Fine, stable grain structure (<10 μm) - Controlled grain boundary chemistry - Uniform deformation characteristics 3. **Retained INCONEL 718 Properties** - Excellent strength and corrosion resistance - Good weldability and fabricability - Superior mechanical properties after heat treatment 4. **Manufacturing Efficiency** - Reduced manufacturing costs for complex parts - Minimal material waste - Net-shape or near-net-shape capability --- ### **Product Applications** **Aerospace Industry:** - Complex aircraft engine components - Turbine blades and casings - Exhaust system components - Structural airframe parts **Defense Applications:** - Missile components - Radar housings - Military aircraft structures - Engine nacelles **Industrial Applications:** - Complex chemical processing equipment - High-temperature tooling - Specialized heat exchangers - Nuclear industry components --- ### **International Standards** | Standard Type | Standard Number | Description | |---------------|-----------------|-------------| | **AMS** | 5950 | Superplastic Forming Alloy Sheet | | **AMS** | 5662 | INCONEL 718 General Specification | | **ASTM** | B670 | Precipitation Hardening Alloy Plate | | **ISO** | 9725 | Nickel Alloy General Requirements | --- ### **Summary** **INCONEL® 718SPF™** represents a significant advancement in manufacturing technology, combining the superior mechanical properties and corrosion resistance of INCONEL 718 with exceptional superplastic forming capabilities. This specialized alloy enables the production of highly complex, net-shape components that maintain the high strength, excellent fatigue resistance, and outstanding corrosion performance required in demanding aerospace and industrial applications. The fine-grained microstructure and optimized superplastic behavior allow for unprecedented design freedom and manufacturing efficiency, making it an ideal choice for components where complex geometries, weight reduction, and performance are critical requirements. Certification to major aerospace standards including AMS specifications ensures consistent quality and reliability for the most demanding applications in advanced manufacturing.

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 3335 gallon liquid totes Special package is available on request.