Alloy 909,Incoloy 909 Rod,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) Rod** #### **1. Overview** Alloy 909 (commonly known as **Incoloy 909**, a trademark of Special Metals Corporation) is a low thermal expansion, high-strength iron-nickel-cobalt superalloy. It is specifically designed for applications requiring high strength and a low coefficient of thermal expansion (CTE) over a wide temperature range, from cryogenic levels up to 650°C (1200°F). This unique combination of properties makes it indispensable in aerospace and precision engineering industries where dimensional stability under thermal cycling is critical. The alloy is precipitation-hardenable, deriving its strength from gamma prime [γ'] formation, similar to nickel-based superalloys. #### **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 and Titanium is crucial for the precipitation hardening process.* #### **3. Physical Properties** The following table outlines key physical properties of Alloy 909 in the 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 | | **Magnetic Permeability** | Typically <1.005 (essentially non-magnetic) | | **Modulus of Elasticity (Young's Modulus)** | 148 GPa (21.5 x 10⁶ psi) | #### **4. Mechanical Properties (Typical for Rod Product in Solution Annealed & Aged Condition)** Properties can vary with section size and specific heat treatment. | 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)** | 12% min | 15% | | **Reduction of Area** | 25% min | 30% | #### **5. International Standards** Alloy 909 rod and bar products conform to several international standards: * **ASTM:** ASTM B637 (Standard Specification for Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock for High-Temperature Service) * **AMS:** AMS 5891 (Bars, Forgings, and Rings, Corrosion and Heat-Resistant, Cobalt-Nickel-Iron Alloy 38Co-34Ni-13Cr-4.7Nb-2.7Mo-1.1Ti, Consumable Electrode or Vacuum Induction Melted, Solution Heat Treated, Precipitation Hardenable) *Note: While AMS 5891 is the primary aerospace standard for this alloy family, it's important to verify the exact grade as it covers similar compositions.* * **UNS:** UNS N19909 * **ISO:** ISO 15156-3 / NACE MR0175 (For use in sour service environments) #### **6. Product Applications** Due to its unique properties, Alloy 909 rod is primarily used for machining critical components in the following applications: * **Aerospace & Gas Turbines:** * Turbine engine seals and shrouds * Afterburner components * High-pressure compressor casings * Mounting rings * **Precision Equipment:** * Laser components requiring dimensional stability * Measurement and optical systems * **Power Generation:** * Gas turbine components in land-based power systems * **Automotive (High-Performance):** * Turbocharger components #### **7. Heat Treatment** To achieve optimal properties, Alloy 909 requires a specific three-step heat treatment: 1. **Solution Treatment:** Typically at 980°C (1800°F), followed by rapid cooling. 2. **Stabilization:** A critical step at 720°C (1325°F) to control the thermal expansion characteristics. 3. **Aging:** Typically at 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 manufacturing process, size, and heat treatment. For critical applications, consult the material supplier for the most precise and up-to-date specifications. ---

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 1989 gallon liquid totes Special package is available on request.