Alloy 909,Incoloy 909 Tube,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) Tube Product** #### **1. Overview** **Alloy 909** (commercially known as **Incoloy® 909**) is a precipitation-hardenable, low-expansion iron-nickel-cobalt superalloy specifically designed for applications requiring exceptional dimensional stability under thermal cycling conditions. The **tube** product form is particularly valuable in aerospace, power generation, and precision instrumentation industries where reliable performance in extreme thermal environments (-250°C to 650°C) is critical. This alloy maintains high strength while exhibiting an exceptionally low coefficient of thermal expansion, making it ideal for applications where thermal fatigue resistance is paramount. #### **2. Chemical Composition (Weight %)** The standard chemical composition of Alloy 909 tubing conforms to the following specifications: | 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 precise balance of Niobium and Titanium creates the gamma prime (γ') precipitation 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 Tube 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 tubing is manufactured to meet various international standards, including: * **ASTM:** **ASTM B829** - Standard Specification for Seamless Nickel and Nickel Alloy Pipe and Tube * **ASTM:** **ASTM B880** - Standard Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys * **AMS:** **AMS 5891** - Bars, Forgings, and Rings, Corrosion and Heat-Resistant, Cobalt-Nickel-Iron Alloy * **UNS:** **UNS N19909** * **ISO:** **ISO 15156-3 / NACE MR0175** - Suitable for sour service environments * **DIN:** **DIN 17752** - Chemical composition and mechanical properties of nickel and nickel alloy tubes #### **6. Product Applications** Alloy 909 tubes are specified for critical applications where thermal stability and reliability are essential: * **Aerospace & Defense:** * Aircraft hydraulic and fuel line tubing * Turbine bleed air systems * Environmental control system ducting * Rocket propulsion system components * **Power Generation:** * Heat exchanger tubing in gas turbines * High-temperature steam instrumentation lines * Nuclear reactor instrumentation tubing * **Precision Instrumentation:** * Cryogenic fluid transfer lines * Temperature sensor sheaths and thermowells * Process control instrumentation tubing * **Chemical Processing:** * High-temperature catalyst injection lines * Process analytical sampling systems #### **7. Heat Treatment** Alloy 909 tubing requires a specific thermal processing sequence to achieve optimal properties: 1. **Solution Treatment:** 980°C (1800°F) followed by rapid cooling 2. **Stabilization:** 720°C (1325°F) - Critical for developing low CTE characteristics 3. **Aging:** 620°C (1150°F) - Precipitates gamma prime phase for maximum strength **Manufacturing Note:** Alloy 909 tubing is typically manufactured as seamless tube through extrusion or pilgering processes to ensure optimum mechanical properties and surface integrity. --- **Disclaimer:** This technical data is provided for informational purposes only. Properties may vary depending on tube dimensions, manufacturing process, and heat treatment parameters. For design and procurement purposes, always consult with the material supplier for certified test reports and 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 1992 gallon liquid totes Special package is available on request.