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

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

### **Technical Data Sheet: Alloy 909 (UNS N19909) Pipe** #### **1. Overview** **Alloy 909** (commercially known as **Incoloy® 909**) is a precipitation-hardenable, low-expansion iron-nickel-cobalt superalloy. This material is specifically engineered for applications requiring exceptional dimensional stability under thermal cycling, from cryogenic temperatures up to 650°C (1200°F). The **pipe** product form is essential for high-performance fluid and gas conveyance systems in extreme environments where traditional materials fail due to thermal stress, fatigue, or loss of strength. Its unique combination of a low coefficient of thermal expansion (CTE) and high strength is derived from a precise chemical composition and a specialized heat treatment process. #### **2. Chemical Composition (Weight %)** The typical chemical composition of Alloy 909 is as follows: | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 38.0% min | | **Cobalt (Co)** | 13.0 - 17.0% | | **Iron (Fe)** | Balance | | **Niobium (Nb)** | 4.3 - 5.2% | | **Titanium (Ti)** | 1.3 - 1.8% | | **Silicon (Si)** | 0.25 - 0.50% | | **Aluminum (Al)** | 0.03% max | | **Carbon (C)** | 0.06% max | | **Manganese (Mn)** | 1.00% max | | **Sulfur (S)** | 0.015% max | | **Boron (B)** | 0.012% max | | **Copper (Cu)** | 0.50% max | | **Phosphorus (P)** | 0.015% max | *Note: The controlled addition of Niobium (Nb) and Titanium (Ti) is critical for the formation of the gamma prime (γ') strengthening phase during heat treatment.* #### **3. Physical Properties (In Heat-Treated Condition)** | Property | Value | | :--- | :--- | | **Density** | 8.23 g/cm³ (0.297 lb/in³) | | **Melting Range** | ~1430°C (2600°F) | | **Coefficient of Thermal Expansion (CTE)** | 20°C to 500°C: **8.5 x 10⁻⁶/°C** | | **Thermal Conductivity** | 21.0 W/m·K (at 100°C) | | **Specific Heat** | 460 J/kg·K (at 100°C) | | **Electrical Resistivity** | 0.95 μΩ·m | | **Modulus of Elasticity** | 148 GPa (21.5 x 10⁶ psi) | | **Magnetic Permeability** | <1.005 (Essentially Non-Magnetic) | #### **4. Mechanical Properties (Typical for Pipe Product in Solution Annealed & Aged Condition)** | Property | At Room Temperature | At 540°C (1000°F) | | :--- | :--- | :--- | | **Tensile Strength** | 1100 MPa (160 ksi) min | 860 MPa (125 ksi) | | **Yield Strength (0.2% Offset)** | 860 MPa (125 ksi) min | 690 MPa (100 ksi) | | **Elongation (in 50mm / 2in)** | 12% min | 15% | #### **5. International Standards** Alloy 909 pipe can be supplied to the following international standards. The specific standard should be confirmed with the manufacturer. * **ASTM:** **ASTM B829** - Standard Specification for Seamless Nickel and Nickel Alloy Pipe and Tube. *(Note: While there isn't a dedicated ASTM pipe specification exclusively for UNS N19909, it is commonly produced to the general requirements of B829 with chemical and mechanical properties meeting ASTM B637 for bar/forging stock.)* * **AMS:** **AMS 5891** - This aerospace material specification is a key governing standard for the alloy's composition and properties, often referenced for procurement. * **UNS:** **UNS N19909** * **ISO:** **ISO 15156-3 / NACE MR0175** - Certified for use in sour service environments containing H₂S. #### **6. Product Applications** Alloy 909 pipe is specified for critical piping systems where thermal fatigue resistance and dimensional stability are non-negotiable. Key applications include: * **Aerospace & Gas Turbine Engines:** * High-pressure fuel and hydraulic lines * Lubrication oil supply lines * Bleed air ducting systems * Exhaust manifold systems * **Power Generation:** * High-temperature steam and process lines in advanced gas turbine systems * Heat exchanger tubing * **Chemical Process Industry:** * Process piping for high-temperature catalysts and reactors. * **Advanced Research:** * Piping for cryogenic fluid transfer systems. #### **7. Heat Treatment** To achieve the specified mechanical properties and low thermal expansion characteristic, Alloy 909 pipe undergoes a precise three-step heat treatment: 1. **Solution Treatment:** Heated to approximately 980°C (1800°F) and rapidly cooled. 2. **Stabilization:** A critical step at 720°C (1325°F) to control the thermal expansion behavior. 3. **Aging:** Heated to 620°C (1150°F) to precipitate the gamma prime phase, providing high-temperature strength. **Disclaimer:** This data is provided for informational purposes only. Properties can vary based on pipe size, wall thickness, and specific manufacturing and heat treatment processes. For critical applications, consult the material supplier for certified test reports and the most current specifications. Incoloy is a registered trademark of Special Metals Corporation.

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 1991 gallon liquid totes Special package is available on request.