Alloy 901,Nimonic 901 Other/Similar Specs,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 - Other/Similar Specifications / UNS N09901** --- #### **1. Overview** **Alloy 901** (commercially known as **Nimonic® 901**) is a nickel-iron-chromium precipitation-hardening superalloy designed for high-temperature applications requiring exceptional creep resistance and mechanical strength. This datasheet covers alternative and similar international specifications for Alloy 901, providing comprehensive cross-reference information for global projects and equivalent material selection. The alloy maintains excellent mechanical properties at temperatures up to 590°C (1100°F) and is widely specified across various international standards systems. --- #### **2. Key Characteristics** * **Excellent High-Temperature Strength:** Maintains mechanical properties at temperatures up to 590°C (1100°F) * **Outstanding Creep Resistance:** Superior creep rupture strength under sustained loading * **Good Fatigue Resistance:** Excellent resistance to thermal and mechanical fatigue * **Age-Hardenable:** Can be strengthened through precipitation hardening heat treatment * **Good Oxidation Resistance:** Suitable for continuous high-temperature service * **Moderate Corrosion Resistance:** Adequate resistance to various corrosive environments --- #### **3. Chemical Composition (Weight %) - Cross Reference** | Element | UNS N09901 | AMS 5660 | DIN 2.4662 | EN NiCr13Mo6Fe6Ti | | :--- | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | 40.0-45.0 | 40.0-45.0 | 40.0-45.0 | 40.0-45.0 | | **Chromium (Cr)** | 11.0-14.0 | 11.0-14.0 | 11.0-14.0 | 11.0-14.0 | | **Iron (Fe)** | Balance | Balance | Balance | Balance | | **Molybdenum (Mo)** | 5.0-6.5 | 5.0-6.5 | 5.0-6.5 | 5.0-6.5 | | **Titanium (Ti)** | 2.8-3.1 | 2.8-3.1 | 2.8-3.1 | 2.8-3.1 | | **Aluminum (Al)** | 0.30 max | 0.30 max | 0.30 max | 0.30 max | | **Carbon (C)** | 0.10-0.20 | 0.10-0.20 | 0.10-0.20 | 0.10-0.20 | | **Boron (B)** | 0.01-0.02 | 0.01-0.02 | 0.01-0.02 | 0.01-0.02 | --- #### **4. Physical Properties (Typical)** | Property | Metric Value | Imperial Value | | :--- | :--- | :--- | | **Density** | 8.21 g/cm³ | 0.297 lb/in³ | | **Melting Range** | 1330-1360°C | 2425-2480°F | | **Specific Heat** | 440 J/kg·K | 0.105 BTU/lb·°F | | **Thermal Conductivity** | 12.5 W/m·K | 72.2 BTU·in/hr·ft²·°F | | **Mean Coefficient of Thermal Expansion** | 13.5 μm/m·K | 7.5 μin/in·°F | | **Electrical Resistivity** | 1.18 μΩ·m | 708 ohm·circ mil/ft | | **Modulus of Elasticity** | 214 GPa | 31.0×10⁶ psi | --- #### **5. Mechanical Properties Comparison (Aged Condition)** | Property | AMS 5660 | ASTM B637 | DIN 2.4662 | | :--- | :--- | :--- | :--- | | **Tensile Strength** | 1240 MPa min | 1200 MPa min | 1200-1400 MPa | | **Yield Strength** | 1030 MPa min | 1000 MPa min | 1000-1200 MPa | | **Elongation** | 8% min | 10% min | 10-15% | | **Hardness** | HB 363 min | HB 350 min | HB 350-400 | --- #### **6. International Standards & Cross-References** **North American Standards:** * **UNS:** N09901 * **ASTM:** B637 (Bars, Forgings), B564 (Forgings) * **AMS:** 5660 (Bars, Forgings), 5661 (Rings), 5911 (Sheet, Strip, Plate) * **ASME:** SB637, SB564 * **AWS:** A5.14 ERNiFeCr-1 **European Standards:** * **EN:** NiCr13Mo6Fe6Ti * **DIN:** 2.4662 * **AFNOR:** NC15FeTNbA * **UNI:** X5NiCrTi26-15 * **SS:** 835104 **Other International Standards:** * **JIS:** NCF 901 * **GOST:** ЭИ867 (Russian equivalent) * **GB:** GH2901 (Chinese equivalent) * **ISO:** 6207 (Nickel alloy plate, sheet, strip) --- #### **7. Heat Treatment Specifications** **Solution Treatment:** * **Temperature:** 1095-1120°C (2000-2050°F) * **Cooling:** Rapid cooling (water quench or fast air cool) * **Atmosphere:** Controlled atmosphere recommended **Aging Treatment:** * **Primary Age:** 775-800°C (1425-1475°F) for 4 hours, air cool * **Secondary Age:** 700-730°C (1290-1350°F) for 24 hours, air cool * **Variations:** Some specifications may allow modified aging cycles --- #### **8. Applications by Industry** **Aerospace Industry:** * Gas turbine engine components * Turbine disks and blades * Compressor parts * Jet engine rings and casings **Power Generation:** * Gas turbine components * Steam turbine parts * High-temperature fasteners * Turbine wheels and shafts **Oil & Gas Industry:** * Wellhead components * Downhole tools * Valve components * High-pressure equipment **Industrial Applications:** * High-temperature bolts and studs * Nuclear reactor components * Chemical processing equipment * Heat treatment fixtures --- #### **9. Product Forms & Specifications** **Wrought Products:** * **Bars & Rods:** ASTM B637, AMS 5660 * **Forgings:** ASTM B564, AMS 5660 * **Sheet & Plate:** AMS 5911, ASTM B409 * **Strip & Foil:** AMS 5912 **Semi-Finished Products:** * **Billets:** For forging and re-rolling * **Blooms:** Large cross-sections * **Slabs:** For plate rolling **Finished Components:** * **Rings:** AMS 5661 * **Fasteners:** Special ordering requirements * **Custom Forgings:** To customer specifications --- #### **10. Important Notes on Equivalency** * **Regional Variations:** While chemical compositions are generally similar, minor variations may exist in impurity elements and processing requirements * **Testing Requirements:** Different standards may specify varying testing methods and acceptance criteria * **Heat Treatment:** Some specifications may have slightly different heat treatment parameters * **Certification:** Always verify material certifications against the specific project requirements * **Technical Approval:** Consult with materials engineers when substituting materials between different standards --- #### **11. Quality Assurance Requirements** **Documentation:** * **Certification:** Mill certificates per EN 10204 3.1/3.2 or equivalent * **Traceability:** Full material traceability from melt to final product * **Testing Reports:** Complete mechanical and chemical test data **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 --- **Disclaimer:** This cross-reference information is provided for guidance only. While every effort has been made to ensure accuracy, specifications are subject to change. Always consult the latest edition of the relevant standards and work with qualified materials engineers for critical applications. Actual properties and processing requirements may vary between different standard systems.

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 1959 gallon liquid totes Special package is available on request.