Alloy 901,Incoloy 901 Tube,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 Tube / UNS N09901** --- #### **1. Overview** **Alloy 901** (commercially referred to as **Incoloy® 901**) is a nickel-iron-chromium precipitation-hardening superalloy specifically engineered for high-temperature tubular applications requiring exceptional creep resistance and mechanical strength. This datasheet focuses on the **Tube** product form, which is utilized in extreme environments where conventional materials fail. Incoloy 901 Tube offers outstanding performance in temperatures up to 590°C (1100°F), maintaining structural integrity under high pressure and thermal cycling conditions, making it ideal for heat exchangers, boiler tubes, and high-temperature instrumentation. --- #### **2. Key Characteristics** * **Excellent High-Temperature Strength:** Maintains mechanical properties at temperatures up to 590°C (1100°F) * **Superior Creep Resistance:** Exceptional long-term creep rupture strength under sustained load * **Outstanding Thermal Fatigue Resistance:** Excellent resistance to thermal cycling and thermal shock * **Age-Hardenable:** Achieves optimal strength through precipitation hardening treatment * **Good Oxidation Resistance:** Suitable for continuous high-temperature service * **Excellent Heat Transfer Properties:** Ideal for heat exchanger applications * **Good Pressure Resistance:** Maintains integrity under high internal pressure --- #### **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, contributes to solid solution 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 grain boundary cohesion | | **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 - Tube)** * **Tensile Strength:** 1200-1350 MPa (174-196 ksi) * **Yield Strength (0.2% Offset):** 1000-1150 MPa (145-167 ksi) * **Elongation:** 12-20% * **Hardness:** HB 350-410 * **Impact Strength:** 35-50 J (26-37 ft-lb) * **Creep Rupture Strength (540°C/1000°F):** 520 MPa (75 ksi) for 1000 hours * **Collapse Strength:** Varies with diameter-to-thickness ratio --- #### **6. International Standards & Specifications** **Tube Product Standards:** * **ASTM B163:** Standard Specification for Seamless Condenser and Heat-Exchanger Tubes * **ASTM B829:** Standard Specification for Seamless Nickel and Nickel Alloy Pipes and Tubes * **ASME SB163:** Nuclear and high-temperature service applications * **ASTM B751:** General Requirements for Nickel and Nickel Alloy Seamless and Welded Tube **Material Specifications:** * **ASTM B637:** Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock * **AMS 5660:** Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings * **AMS 5580:** Seamless Tubing, Corrosion and Heat-Resistant **Dimensional Standards:** * **ASTM B163:** Covers dimensional requirements for condenser tubes * **ASME B36.19M:** Applicable for dimensional references **International Equivalents:** * **UNS:** N09901 * **EN:** NiCr13Mo6Fe6Ti * **DIN:** 2.4662 * **JIS:** NCF 901 * **ISO:** 6207 (Nickel alloy tubes) --- #### **7. Product Specifications & Availability** **Tube Specifications:** * **Outside Diameter:** 3 mm to 150 mm (0.125" to 6") * **Wall Thickness:** 0.5 mm to 12 mm (0.020" to 0.500") * **Length:** Standard 6-7 meters (20-24 feet), custom lengths available * **Tolerance:** OD ±0.1mm, WT ±10% (standard) **Manufacturing Processes:** * **Seamless Tube:** Hot extruded, cold drawn, or pilgered * **Welded Tube:** Generally not recommended for critical applications * **Finish:** Cold drawn, annealed, or hard **Available Conditions:** * **Solution Annealed:** 1095-1120°C (2000-2050°F) * **Solution Treated & Aged:** Fully heat treated ready for service * **Cold Worked:** For specific applications requiring higher strength --- #### **8. Applications** **Heat Exchanger Applications:** * Shell and tube heat exchangers for corrosive service * Condenser tubes in power generation * Cooler and heater tubes in refinery service * Evaporator and reboller tubes **Aerospace Industry:** * Aircraft engine heat exchanger tubes * Hydraulic and fuel system tubing * Environmental control system components * Thermal management system tubing **Power Generation:** * High-pressure boiler tubes * Steam generator tubes * Feedwater heater tubes * Superheater and reheater tubes **Oil & Gas Industry:** * Downhole instrumentation tubing * Heat exchanger tubing in refineries * Surface condenser tubing * Process heat transfer tubing **Industrial Applications:** * High-temperature furnace tubing * Heat treatment fixture components * Nuclear reactor instrumentation tubes * Chemical processing equipment --- #### **9. Processing & Fabrication** **Tube Installation:** * **Tube Expansion:** Can be roller expanded into tube sheets * **Bending:** Cold bending with mandrel for tight radii * **Flaring/Flanging:** Possible with proper tooling and annealing * **Welding:** Requires specialized procedures **Welding Procedures:** * **Weldability:** Challenging - requires specialized procedures * **Recommended Process:** GTAW (TIG) with pulsed current * **Filler Metal:** AWS A5.14 ERNiFeCr-1 * **Preheat Temperature:** 200-300°C (400-570°F) * **Interpass Temperature:** 150-200°C (300-400°F) **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 --- #### **10. Quality Assurance & Testing** **Certification Requirements:** * Full traceability with mill certifications * Certified Mill Test Reports (CMTR) * Heat treatment records * Chemical analysis certificates **Non-Destructive Testing:** * **Eddy Current Testing:** Per ASTM E309 for surface defects * **Ultrasonic Testing:** Per ASTM A388 for internal defects * **Hydrostatic Testing:** Per applicable codes * **Visual Inspection:** Per ASTM A450 **Destructive Testing:** * **Flattening Tests:** Per ASTM A450 requirements * **Flare Tests:** For ductility assessment * **Hardness Surveys:** Multiple points along tube length * **Microstructural Examination:** Grain size and phase distribution **Dimensional Inspection:** * OD, ID, and wall thickness verification * Ovality and straightness checks * Surface finish evaluation * Length verification --- **Disclaimer:** This technical information is for reference purposes. For critical applications in aerospace, nuclear, or pressure-containing services, always consult the specific material certification and the latest version of applicable standards and codes. Actual properties may vary depending on manufacturing processes, heat treatment, and specific tube 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 1966 gallon liquid totes Special package is available on request.