Alloy 901,Nimonic 901 Bar(Round bar, Flat bar),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 Bar (Round Bar & Flat Bar) / 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 specifically addresses **Round Bar** and **Flat Bar** product forms, which serve as fundamental stock materials for machining high-temperature components in aerospace, power generation, and industrial applications. These product forms offer excellent machinability in the solution-treated condition and develop superior mechanical properties through subsequent aging treatment. --- #### **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:** Achieves high strength 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 | Austenitic matrix former, provides base strength | | **Chromium (Cr)** | 11.0 | 14.0 | Provides oxidation and corrosion 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 (γ' former) | | **Aluminum (Al)** | - | 0.30 | Secondary hardening element | | **Carbon (C)** | 0.10 | 0.20 | Carbide former 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)** **Round Bar Properties:** * **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 **Flat Bar Properties:** * **Tensile Strength:** 1200-1350 MPa (174-196 ksi) * **Yield Strength (0.2% Offset):** 1000-1150 MPa (145-167 ksi) * **Elongation:** 10-18% * **Hardness:** HB 350-410 --- #### **6. International Standards & Specifications** **Primary 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 **Product-Specific Standards:** * **Round Bar:** ASTM B637, AMS 5660 * **Flat Bar:** AMS 5911, ASTM B408 **International Equivalents:** * **UNS:** N09901 * **EN:** NiCr13Mo6Fe6Ti * **DIN:** 2.4662 * **ISO:** 6207 (Nickel alloy bars) --- #### **7. Product Specifications & Availability** **Round Bar:** * **Diameter Range:** 5 mm to 300 mm (0.2" to 12") * **Length:** 3-6 meters (10-20 feet), custom lengths available * **Tolerance:** h9, h11, or per customer requirements * **Surface Finish:** Black, turned, ground, or polished **Flat Bar:** * **Thickness:** 5 mm to 100 mm (0.2" to 4") * **Width:** 20 mm to 300 mm (0.8" to 12") * **Length:** 2-6 meters (6-20 feet) * **Edge Condition:** As-rolled, machined, or ground **Available Conditions:** * **Solution Treated:** Optimal for machining * **Solution Treated & Aged:** Ready for service * **Hot Worked:** As-forged or as-rolled condition --- #### **8. Applications** **Aerospace Industry:** * Gas turbine engine components * Turbine disks and shafts * Compressor rotors and blades * Engine structural components **Power Generation:** * Gas turbine rotor components * Steam turbine blades and disks * High-temperature fasteners and studs * Turbine wheel and shaft components **Industrial Applications:** * High-temperature bolts and fasteners * Nuclear reactor components * Chemical processing equipment * Heat treatment fixtures and tools **Specific Component Applications:** * **Round Bar:** Shafts, rotors, spindles, axles * **Flat Bar:** Structural supports, brackets, blades, seals --- #### **9. Processing & Fabrication** **Machining Guidelines:** * **Condition:** Machine in solution-treated condition * **Tool Material:** Premium carbide tools recommended * **Cutting Speed:** 10-20 m/min (30-65 SFM) * **Feed Rate:** 0.1-0.2 mm/rev (0.004-0.008 IPR) * **Coolant:** High-pressure coolant essential **Heat Treatment:** * **Solution Treatment:** 1095-1120°C (2000-2050°F), rapid cool * **Aging Treatment:** - Primary: 775-800°C (1425-1475°F) for 4 hours, air cool - Secondary: 700-730°C (1290-1350°F) for 24 hours, air cool **Welding Considerations:** * **Weldability:** Fair - requires special precautions * **Recommended Process:** GTAW * **Filler Metal:** AWS A5.14 ERNiFeCr-1 * **Pre/Post Weld Heat Treatment:** Required --- #### **10. Quality Assurance** * **Certification:** Full traceability with material certifications * **Testing:** Tensile, hardness, and impact testing * **Non-Destructive Testing:** UT, PT, MT as specified * **Microstructural Examination:** Grain size and phase distribution * **Chemical Analysis:** Full composition verification per heat/lot * **Dimensional Inspection:** 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 1951 gallon liquid totes Special package is available on request.