Alloy 909,Incoloy 909 Forgings,UNS N19909,E FORU

British Specs:，American Specs:AMS 5884 Bars, Forgings, Rings AMS 5892 Sheet, Strip AMS 5893 Bars, Forgings, Rings，German Specs:

### **Product Datasheet: Alloy 909 / Incoloy 909 Forgings (UNS N19909)** **Alloy 909** (commercially known as **Incoloy 909**) is a low thermal expansion, high-strength iron-nickel-cobalt superalloy produced in forged form. Forgings of this alloy are specifically engineered for critical applications requiring exceptional dimensional stability, high mechanical strength, and reliable performance under severe thermal cycling conditions and mechanical stress. The forging process enhances the material's properties by refining its grain structure, improving toughness, and eliminating internal defects. When combined with the alloy's precipitation-hardening heat treatment, it results in components with optimal strength-to-weight ratio and exceptional resistance to thermal fatigue. --- #### **1. Chemical Composition** The chemical composition of Alloy 909 forgings is precisely controlled to ensure consistent mechanical and thermal properties. The typical composition (by weight %) is as follows: | Element | Content (%) | |:---|:---| | **Nickel (Ni)** | 38.0 - 41.0 | | **Cobalt (Co)** | 13.0 - 17.0 | | **Iron (Fe)** | Balance | | **Niobium (Nb)** | 4.5 - 5.5 | | **Titanium (Ti)** | 1.3 - 1.8 | | **Silicon (Si)** | 0.40 - 0.80 | | **Aluminum (Al)** | 0.03 max | | **Carbon (C)** | 0.04 max | | **Manganese (Mn)** | 0.50 max | | **Magnesium (Mg)** | 0.003 - 0.012 | | **Sulfur (S)** | 0.004 max | | **Phosphorus (P)** | 0.010 max | | **Boron (B)** | 0.003 max | *Note: Niobium and Titanium enable age-hardening through the formation of gamma prime precipitates. The carefully balanced composition ensures optimal thermal expansion control and long-term stability.* --- #### **2. Physical Properties** Alloy 909 forgings exhibit unique physical properties essential for high-precision applications: | Property | Value / Description | |:---|:---| | **Density** | 8.23 g/cm³ (0.297 lb/in³) | | **Melting Range** | ~1430°C (2600°F) | | **Coefficient of Thermal Expansion (CTE)** | **Very Low.** Typically 5.9 - 7.1 x 10⁻⁶/°C (20-400°C) | | **Thermal Conductivity** | 11.5 W/m·K (at 100°C) | | **Specific Heat** | 460 J/kg·K (at 100°C) | | **Modulus of Elasticity** | 148 GPa (21.5 x 10⁶ psi) | | **Magnetic Permeability** | Essentially non-magnetic | --- #### **3. Mechanical Properties (Typical for Forgings in Aged Condition)** Forgings are heat treated to achieve optimal mechanical properties through solution annealing and aging: | Property | Typical Value | |:---|:---| | **Tensile Strength** | 1100 - 1310 MPa (160 - 190 ksi) | | **Yield Strength (0.2% Offset)** | 960 - 1170 MPa (139 - 170 ksi) | | **Elongation** | 12% - 15% | | **Reduction of Area** | 25% - 35% | | **Hardness (Rockwell C)** | 32 - 40 HRC | --- #### **4. Product Applications** Alloy 909 forgings are utilized in demanding applications where dimensional stability and high strength are critical: * **Aerospace & Gas Turbine Engines:** * **Turbine Engine Shafts** and **Compressor Components** * **Engine Mounting Rings** and **Support Structures** * **Turbine Seals** and **Casing Components** * **Power Generation:** * **Gas Turbine Components** for power plants * **Nuclear Reactor Instrumentation Components** * **High-Performance Automotive:** * **Turbocharger Components** and **Exhaust System Parts** * **Specialized Industrial Equipment:** * **Precision Measurement Equipment** components * **Optical System Mounts** requiring thermal stability --- #### **5. International Standards** Alloy 909 forgings conform to several international standards ensuring quality and performance: | Standard Type | Standard Number | Description | |:---|:---|:---| | **Unified Numbering System** | **UNS N19909** | Universal material designation | | **Aerospace Material (AMS)** | **AMS 5891** | Standard for bars, forgings, and rings - primary specification for aerospace forgings | | **ASTM International** | **ASTM B710** | Standard specification for nickel-iron-chromium alloy forgings | | **Dimensional Standards** | **Customer Specifications** | Typically manufactured to customer print requirements | | **Quality Standards** | **ISO 9001, AS9100** | Quality management system requirements for aerospace applications | --- #### **Key Advantages of Alloy 909 Forgings** * **Superior Grain Structure:** The forging process produces a refined, uniform grain flow that enhances mechanical properties * **Exceptional Dimensional Stability:** Maintains precise dimensions under wide temperature fluctuations * **High Strength-to-Weight Ratio:** Ideal for weight-critical aerospace applications * **Excellent Thermal Fatigue Resistance:** Withstands repeated thermal cycling without degradation * **Enhanced Reliability:** Forgings eliminate porosity and internal defects common in cast components * **Good Machinability:** Can be precision machined to close tolerances after heat treatment Alloy 909 forgings represent the premium product form for critical components where reliability, strength, and dimensional stability are paramount. The combination of forged metallurgical structure with the alloy's unique thermal properties makes it indispensable for advanced aerospace and industrial applications.

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 1997 gallon liquid totes Special package is available on request.