Alloy 909,Incoloy 909 ,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 Datasheet: Alloy 909 / Incoloy 909 / UNS N19909 --- #### 1. Overview **Alloy 909** (commercially known as **Incoloy® 909**) is a nickel-iron-cobalt-niobium precipitation-hardening superalloy specifically designed for applications requiring controlled thermal expansion characteristics and high strength at elevated temperatures. This alloy maintains excellent mechanical properties and dimensional stability at temperatures up to 650°C (1200°F), making it particularly suitable for gas turbine engine components where close clearance control is critical. The unique combination of low thermal expansion and high temperature strength makes Incoloy 909 ideal for applications demanding thermal stability under cyclic conditions. --- #### 2. Key Characteristics * **Controlled Thermal Expansion:** Low and predictable thermal expansion characteristics * **High Temperature Strength:** Excellent mechanical properties at temperatures up to 650°C (1200°F) * **Outstanding Creep Resistance:** Superior creep rupture strength under sustained loading * **Excellent Thermal Stability:** Maintains dimensional stability under thermal cycling * **Age-Hardenable:** Achieves optimal strength through precipitation hardening heat treatment * **Good Oxidation Resistance:** Suitable for continuous high-temperature service * **Good Fatigue Resistance:** Excellent resistance to thermal and mechanical fatigue --- #### 3. Chemical Composition (Weight %) | Element | Minimum (%) | Maximum (%) | Key Function | | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | 35.0 | 40.0 | Matrix element providing austenitic structure | | **Iron (Fe)** | Balance | - | Base element for cost-effective strengthening | | **Cobalt (Co)** | 12.0 | 16.0 | Enhances high-temperature strength and stability | | **Niobium (Nb)** | 4.0 | 5.0 | Primary precipitation hardening element | | **Titanium (Ti)** | 1.3 | 1.8 | Secondary precipitation hardener | | **Silicon (Si)** | 0.25 | 0.50 | Improves oxidation resistance | | **Aluminum (Al)** | 0.05 | 0.30 | Enhances oxidation resistance | | **Carbon (C)** | 0.01 | 0.05 | Controlled for carbide formation | | **Manganese (Mn)** | 0.50 | 1.00 | - | | **Sulfur (S)** | - | 0.015 | - | | **Boron (B)** | 0.003 | 0.010 | Enhances creep strength | --- #### 4. Physical Properties (Typical) | Property | Metric Value | Imperial Value | | :--- | :--- | :--- | | **Density** | 8.25 g/cm³ | 0.298 lb/in³ | | **Melting Range** | 1360-1420°C | 2480-2590°F | | **Specific Heat (20°C)** | 450 J/kg·K | 0.107 BTU/lb·°F | | **Thermal Conductivity** | 14.2 W/m·K | 82.0 BTU·in/hr·ft²·°F | | **Mean Coefficient of Thermal Expansion (20-400°C)** | 10.8 μm/m·K | 6.0 μin/in·°F | | **Electrical Resistivity** | 1.05 μΩ·m | 630 ohm·circ mil/ft | | **Modulus of Elasticity** | 210 GPa | 30.5×10⁶ psi | --- #### 5. Mechanical Properties (Typical for Aged Condition) * **Tensile Strength:** 1350-1500 MPa (196-218 ksi) * **Yield Strength (0.2% Offset):** 1100-1250 MPa (160-181 ksi) * **Elongation:** 10-20% * **Reduction of Area:** 15-25% * **Hardness:** HB 390-440 * **Impact Strength:** 30-50 J (22-37 ft-lb) * **Creep Rupture Strength (650°C/1200°F):** 620 MPa (90 ksi) for 1000 hours --- #### 6. International Standards & Specifications **Primary Standards:** * **AMS 5919:** Nickel Alloy, Corrosion and Heat Resistant, Sheet, Strip, and Plate * **ASTM B672:** Standard Specification for Nickel-Iron-Chromium-Molybdenum-Columbium Stabilized Alloy Bar and Wire * **AMS 5920:** Nickel Alloy, Corrosion and Heat Resistant, Bars, Forgings, and Rings **Aerospace Standards:** * **GE S400:** Gas Turbine Engine Specifications * **Pratt & Whitney:** Material Specifications * **Rolls-Royce:** RPS 500 Series **International Equivalents:** * **UNS:** N19909 * **EN:** NiCr15Fe7NbTiMo * **DIN:** 2.4667 * **ISO:** 6207 (Nickel alloy plate, sheet, strip) --- #### 7. Heat Treatment **Solution Treatment:** * **Temperature:** 980-1010°C (1800-1850°F) * **Time:** 1-2 hours depending on section size * **Cooling:** Rapid air cooling or oil quenching **Aging Treatment:** * **Primary Age:** 730-760°C (1350-1400°F) for 8 hours, air cool * **Secondary Age:** 620-650°C (1150-1200°F) for 8 hours, air cool **Alternative Aging:** * **Single Step Age:** 750-780°C (1380-1435°F) for 16 hours for some applications --- #### 8. Applications **Aerospace Industry:** * Gas turbine engine casings and seals * Turbine shrouds and rings * Compressor cases and frames * Exhaust system components * Engine mount components **Power Generation:** * Gas turbine casing components * Steam turbine seals * High-temperature fasteners * Power generation turbine components * Nuclear reactor components **Industrial Applications:** * High-temperature furnace components * Heat treatment fixtures * Chemical processing equipment * Thermal processing equipment * Precision instrument components **Specific Component Applications:** * **Turbine Shrouds:** Maintaining close clearance control * **Engine Casings:** Dimensional stability under thermal cycling * **Seal Rings:** High-temperature sealing applications * **Structural Components:** High-temperature frame elements --- #### 9. Manufacturing Considerations **Machining:** * **Condition:** Machine in solution-treated condition * **Tool Material:** Premium carbide tools recommended * **Cutting Speed:** 10-20 m/min (30-65 SFM) * **Feed Rate:** 0.1-0.3 mm/rev (0.004-0.012 IPR) * **Coolant:** High-pressure coolant essential **Welding:** * **Weldability:** Good with proper procedures * **Recommended Process:** GTAW preferred * **Filler Metal:** AWS A5.14 ERNiFeCr-3 or matching composition * **Preheat Temperature:** 150-200°C (300-400°F) * **Post-Weld Heat Treatment:** Required to restore properties **Forging:** * **Temperature Range:** 1050-1150°C (1920-2100°F) * **Heating Rate:** Controlled to avoid thermal shock * **Soaking Time:** Adequate for complete through-heating * **Cooling:** Controlled cooling after forging --- #### 10. Quality Assurance **Certification Requirements:** * Full traceability from melt to final product * Certified Mill Test Reports (CMTR) * Heat treatment charts and records * Chemical analysis certificates **Testing Requirements:** * **Chemical Analysis:** Full composition verification * **Mechanical Testing:** Tensile, hardness, impact tests * **Non-Destructive Testing:** UT, PT, MT as specified * **Microstructural Examination:** Grain size, phase distribution * **Thermal Expansion Testing:** For critical applications **Documentation:** * Material certificates per EN 10204 3.1/3.2 * Process control records * Final inspection reports * Compliance certificates --- **Disclaimer:** This technical information is for reference purposes. For critical applications in aerospace, nuclear, or high-temperature services, always consult the specific material certification and the latest version of applicable standards. Actual properties may vary depending on manufacturing processes, heat treatment, and specific product form.

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 1988 gallon liquid totes Special package is available on request.