Alloy 901,Incoloy 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 / Incoloy 901 Rod / UNS N09901** --- #### **1. Overview** **Alloy 901** (commercially referred to as **Incoloy® 901**) is a nickel-iron-chromium precipitation-hardening superalloy designed for high-temperature applications requiring exceptional creep resistance and mechanical strength. This datasheet specifically 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. Incoloy 901 Rod offers an optimal balance between high-temperature performance and cost-effectiveness, maintaining excellent mechanical properties at temperatures up to 590°C (1100°F). --- #### **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 mechanical fatigue * **Age-Hardenable:** Achieves high strength through precipitation hardening heat treatment * **Good Machinability:** Can be precision machined in solution-treated condition * **Cost-Effective Performance:** Optimal balance of properties and cost compared to more highly alloyed superalloys * **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 base, provides high-temperature stability | | **Chromium (Cr)** | 11.0 | 14.0 | Provides oxidation and corrosion resistance | | **Iron (Fe)** | Balance | - | Base element, provides cost-effective strengthening | | **Molybdenum (Mo)** | 5.0 | 6.5 | Solid solution strengthener, enhances high-temperature strength | | **Titanium (Ti)** | 2.8 | 3.1 | Primary precipitation hardening element (forms γ' phase) | | **Aluminum (Al)** | - | 0.30 | Secondary hardening element | | **Carbon (C)** | 0.10 | 0.20 | Forms carbides for grain boundary strengthening | | **Boron (B)** | 0.01 | 0.02 | Enhances creep strength and ductility | | **Manganese (Mn)** | - | 0.50 | - | | **Silicon (Si)** | - | 0.40 | - | | **Sulfur (S)** | - | 0.015 | - | | **Copper (Cu)** | - | 0.50 | - | --- #### **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 (20°C)** | 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 (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 * **Impact Strength:** 35-50 J (26-37 ft-lb) * **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 * **ASTM B425:** Nickel-Iron-Chromium-Molybdenum-Copper Alloy Bar and Wire **Dimensional Standards:** * **ASME SB637:** Nuclear and high-temperature service applications * **ASTM B637:** Standard specifications for rod dimensions **International Equivalents:** * **UNS:** N09901 * **EN:** NiCr13Mo6Fe6Ti * **DIN:** 2.4662 * **JIS:** NCF 901 * **GB:** GH2901 (Chinese equivalent) --- #### **7. Product Specifications & Availability** **Rod Specifications:** * **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 * **Straightness:** Typically 1 mm per meter maximum **Available Conditions:** * **Solution Treated:** Optimal for machining (1095-1120°C) * **Solution Treated & Aged:** Ready for service * **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 * Aircraft structural fasteners **Power Generation:** * Gas turbine rotor components * Steam turbine blades and disks * High-temperature bolts and studs * Turbine wheel shafts **Oil & Gas Industry:** * Wellhead components * Downhole tool shafts * High-pressure valve stems * Subsea equipment components **Industrial Applications:** * High-temperature fasteners * Nuclear reactor components * Chemical processing equipment shafts * Heat treatment fixture components **Specific Component Applications:** * **Shafts:** Rotating components in high-temperature environments * **Fasteners:** Bolts, studs, and specialized fasteners * **Valve Components:** Stems, plugs, and trim parts * **Structural Components:** High-temperature supports and brackets --- #### **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) * **Depth of Cut:** 1-3 mm (0.040-0.120 inches) * **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 * **Stress Relieving:** 650-675°C (1200-1250°F) for 2-4 hours **Welding Considerations:** * **Weldability:** Fair - requires special precautions * **Recommended Process:** GTAW (TIG) preferred * **Filler Metal:** AWS A5.14 ERNiFeCr-1 * **Preheat Temperature:** 200-300°C (400-570°F) * **Post-Weld Heat Treatment:** Required to restore properties --- #### **10. Quality Assurance** **Material Certification:** * 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 **Dimensional Inspection:** * Diameter verification at multiple points * Straightness and surface quality assessment * Length and end condition inspection * Compliance with specified tolerances --- **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 rod dimensions.

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 1963 gallon liquid totes Special package is available on request.