Alloy 901,Incoloy 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 / Incoloy 901 Bar (Round Bar & Flat Bar) / 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 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, maintaining performance 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 and thermal 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 * **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)** **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 * **ASTM B425:** Nickel-Iron-Chromium-Molybdenum-Copper Alloy Bar and Wire **Product-Specific Standards:** * **Round Bar:** ASTM B637, AMS 5660 * **Flat Bar:** AMS 5911, ASTM B408 **International Equivalents:** * **UNS:** N09901 * **EN:** NiCr13Mo6Fe6Ti * **DIN:** 2.4662 * **JIS:** NCF 901 * **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 * **Straightness:** 1 mm per meter maximum **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 (1095-1120°C) * **Solution Treated & Aged:** Ready for service * **Hot Worked:** As-forged or as-rolled condition * **Cold Finished:** Improved surface finish and tolerance --- #### **8. Applications** **Aerospace Industry:** * Gas turbine engine components * Turbine disks and shafts * Compressor rotors and blades * Engine structural components * Aircraft landing gear components **Power Generation:** * Gas turbine rotor components * Steam turbine blades and disks * High-temperature fasteners and studs * Turbine wheel and shaft components **Oil & Gas Industry:** * Wellhead components * Downhole tool components * High-pressure valve parts * Subsea equipment 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, fasteners, axles * **Flat Bar:** Structural supports, brackets, blades, seals, wear strips --- #### **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:** 0.1-0.3 mm/rev (0.004-0.012 IPR) * **Depth of Cut:** 1-4 mm (0.040-0.160 inches) * **Coolant:** High-pressure coolant essential **Heat Treatment:** * **Solution Treatment:** 1095-1120°C (2000-2050°F), rapid cooling * **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:** * **Round Bar:** Diameter, straightness, surface quality * **Flat Bar:** Thickness, width, flatness, edge condition * **Surface Quality:** Visual and microscopic inspection * **Documentation:** Compliance certificates and test reports --- **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 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 1964 gallon liquid totes Special package is available on request.