Alloy 901,Nimonic 901 Rod,UNS N09901,E FORU

British Specs:，American Specs:AMS 5830 Welding Wire AMS 5660 Bar and Forgings AMS 5661 Bar and Forgings，German Specs:WS 2.4662

### **Technical Datasheet: Alloy 901 / Nimonic 901 Rod / UNS N09901** --- #### **1. Overview** **Alloy 901** (commercially known as **Nimonic® 901**) is a nickel-iron-chromium precipitation-hardening superalloy specifically designed for high-temperature applications requiring exceptional creep resistance and mechanical strength. This datasheet focuses on the **Rod** product form, which serves as essential stock material for machining high-temperature components such as fasteners, turbine parts, and structural elements in demanding environments. The age-hardenable nature of Nimonic 901 Rod allows it to maintain excellent mechanical properties at temperatures up to 590°C (1100°F). The designations **Alloy 901**, **Nimonic 901 Rod**, and **UNS N09901** refer to this high-strength, precipitation-hardenable nickel-base superalloy supplied in rod form for precision machining and high-temperature applications. --- #### **2. Key Characteristics** * **Excellent High-Temperature Strength:** Maintains mechanical properties at elevated temperatures * **Outstanding Creep Resistance:** Superior creep rupture strength up to 590°C (1100°F) * **Good Fatigue Resistance:** Excellent resistance to thermal and mechanical fatigue * **Age-Hardenable:** Can be strengthened through precipitation hardening heat treatment * **Good Machinability:** Can be precision machined in solution-treated condition * **Good Oxidation Resistance:** Suitable for continuous high-temperature service --- #### **3. Chemical Composition (Weight %)** | Element | Minimum (%) | Maximum (%) | Key Function | | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | 40.0 | 45.0 | Matrix element providing base strength and stability | | **Chromium (Cr)** | 11.0 | 14.0 | Provides oxidation resistance | | **Iron (Fe)** | Balance | - | Base element, contributes to solid solution strengthening | | **Molybdenum (Mo)** | 5.0 | 6.5 | Solid solution strengthener | | **Titanium (Ti)** | 2.8 | 3.1 | Primary precipitation hardening element (forms γ' phase) | | **Aluminum (Al)** | - | 0.30 | - | | **Carbon (C)** | 0.10 | 0.20 | Forms carbides for grain boundary strengthening | | **Boron (B)** | 0.01 | 0.02 | Enhances creep strength | | **Manganese (Mn)** | - | 0.50 | - | | **Silicon (Si)** | - | 0.40 | - | | **Sulfur (S)** | - | 0.015 | - | | **Copper (Cu)** | - | 0.50 | - | --- #### **4. Physical Properties (Typical)** | Property | Value | | :--- | :--- | | **Density** | 8.21 g/cm³ (0.297 lb/in³) | | **Melting Range** | 1330 - 1360 °C (2425 - 2480 °F) | | **Specific Heat (20°C)** | 440 J/kg·K | | **Thermal Conductivity** | 12.5 W/m·K (at 100°C) | | **Mean Coefficient of Thermal Expansion** | 13.5 μm/m·K (20 - 100°C) | | **Electrical Resistivity** | 1.18 μΩ·m | | **Modulus of Elasticity** | 214 GPa (31.0 x 10⁶ psi) | --- #### **5. Mechanical Properties (Typical for Aged Condition - Rod)** * **Tensile Strength:** 1240-1380 MPa (180-200 ksi) * **Yield Strength (0.2% Offset):** 1030-1170 MPa (150-170 ksi) * **Elongation:** 8-15% * **Reduction of Area:** 10-20% * **Hardness:** HB 360-420 * **Creep Rupture Strength (540°C/1000°F):** 550 MPa (80 ksi) for 1000 hours --- #### **6. International Standards & Specifications** **Rod Product Standards:** * **ASTM B637:** Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock * **AMS 5660:** Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings * **AMS 5911:** Nickel Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate **Aerospace Standards:** * **AMS 5661:** Rings and Rolled Ring Blanks * **BAC 5617:** Boeing Material Specification **European Standards:** * **UNS:** N09901 * **EN:** NiCr13Mo6Fe6Ti * **DIN:** 2.4662 --- #### **7. Rod Specifications & Availability** **Standard Sizes:** * **Diameter Range:** 5 mm to 300 mm (0.2" to 12") * **Length:** Standard 3-6 meters (10-20 feet), custom lengths available * **Tolerance:** h9, h11, or per customer requirements **Available Conditions:** * **Solution Treated:** Optimal for machining * **Solution Treated & Aged:** Ready for use * **Hot Finished:** As-forged condition * **Turned/Ground:** Precision finished surfaces **Surface Finish:** * **Black Surface:** Hot worked finish * **Turned:** Machine turned surface * **Ground:** Precision ground finish * **Polished:** Special surface requirements --- #### **8. Applications** **Aerospace Industry:** * Gas turbine engine shafts * Turbine disks and hubs * Compressor rotors * Engine mounting components **Power Generation:** * Gas turbine rotor components * Steam turbine blades and disks * High-temperature bolts and studs * Turbine wheel shafts **Industrial Applications:** * High-temperature fasteners * Nuclear reactor components * Chemical processing equipment shafts * Heat treatment fixture components **Specialized Applications:** * Turbocharger shafts * High-performance engine components * Rocket motor components * Nuclear fuel processing equipment --- #### **9. Machining & Processing** **Machining Guidelines:** * **Condition:** Machine in solution-treated condition * **Tool Material:** Premium carbide or ceramic tools * **Cutting Speed:** 10-20 m/min (30-65 SFM) * **Feed Rate:** 0.1-0.2 mm/rev (0.004-0.008 IPR) * **Coolant:** High-pressure coolant required **Heat Treatment:** * **Solution Treatment:** 1095-1120°C (2000-2050°F), rapid cool * **Aging Treatment:** 775-800°C (1425-1475°F) for 4 hours + 700-730°C (1290-1350°F) for 24 hours * **Stress Relieving:** 650-675°C (1200-1250°F) for 2-4 hours **Welding Considerations:** * **Weldability:** Fair - requires special precautions * **Processes:** GTAW preferred * **Filler Metal:** AWS A5.14 ERNiFeCr-1 * **Pre/Post Heat Treatment:** Required --- #### **10. Quality Assurance** * **Certification:** Full traceability with material certifications * **Testing:** Tensile, hardness, and impact testing at room and elevated temperatures * **Non-Destructive Testing:** UT, PT, MT as required * **Microstructural Examination:** Grain size and phase distribution analysis * **Chemical Analysis:** Full composition verification per heat/lot * **Dimensions:** Strict adherence to specified tolerances --- **Disclaimer:** This technical information is for reference purposes. For critical applications, always consult the specific material certification and the latest version of the relevant standards. Actual properties may vary depending on manufacturing processes and heat treatment.

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 1950 gallon liquid totes Special package is available on request.