Alloy 909,Incoloy 909 Plate,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) Plate Product** #### **1. Overview** **Alloy 909** (commercially known as **Incoloy® 909**) is a precipitation-hardenable, low-expansion iron-nickel-cobalt superalloy specifically engineered for applications requiring exceptional dimensional stability under thermal cycling conditions. The **plate** product form serves critical applications in aerospace, power generation, and industrial processing where maintaining structural integrity across extreme temperature ranges (-250°C to 650°C) is essential. This alloy combines high strength with an exceptionally low coefficient of thermal expansion, making it ideal for applications where thermal fatigue resistance and dimensional stability are paramount. #### **2. Chemical Composition (Weight %)** The standard chemical composition of Alloy 909 plate 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, which is essential for the alloy's high-temperature performance.* #### **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 Plate 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% | | **Hardness** | 321 HB min | - | #### **5. International Standards** Alloy 909 plate is manufactured to meet various international standards, including: * **ASTM:** **ASTM B625/ B625M** - Standard Specification for Plate, Sheet, and Strip of UNS N08904, N08354, and N09925 * **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 containing H₂S * **EN:** **EN 10095** - Heat resisting steels and nickel alloys #### **6. Product Applications** Alloy 909 plates are specified for critical structural applications where thermal stability and reliability are essential: * **Aerospace & Defense:** * Engine mounting plates and structural supports * Exhaust system components and heat shields * Airframe components subjected to thermal cycling * Satellite and spacecraft structural members * **Power Generation:** * Gas turbine structural components and casings * Heat treatment fixtures and support structures * Nuclear reactor internal components * **Industrial Processing:** * High-temperature furnace components * Heat treatment trays and fixtures * Chemical processing equipment structural parts * **Precision Engineering:** * Optical and laser system mounting plates * Measurement equipment bases and frames * Semiconductor processing equipment #### **7. Heat Treatment** Alloy 909 plate 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 plate is typically available in thicknesses ranging from 5mm to 100mm (0.2" to 4"), with specific thickness limitations dependent on the manufacturing process and heat treatment capabilities. --- **Disclaimer:** This technical data is provided for informational purposes only. Properties may vary depending on plate thickness, 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 1993 gallon liquid totes Special package is available on request.