Alloy 901,Nimonic 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 / Nimonic 901 Tube / UNS N09901** --- #### **1. Overview** **Alloy 901** (commercially known as **Nimonic® 901**) is a nickel-iron-chromium precipitation-hardening superalloy specifically engineered for high-temperature applications demanding exceptional creep resistance and mechanical strength. This datasheet focuses on the **Tube** product form, which is utilized in extreme environments where conventional materials fail. Nimonic 901 Tube offers outstanding performance in temperatures up to 590°C (1100°F), maintaining structural integrity under high pressure and thermal cycling conditions. --- #### **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 shock * **Age-Hardenable:** Achieves optimal strength through precipitation hardening treatment * **Good Oxidation Resistance:** Suitable for continuous high-temperature service * **Excellent Pressure Containment:** Ideal for high-pressure tubular applications --- #### **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 | Confers oxidation and corrosion resistance | | **Iron (Fe)** | Balance | - | Base element, enhances solid solution strengthening | | **Molybdenum (Mo)** | 5.0 | 6.5 | Solid solution strengthener, improves high-temperature strength | | **Titanium (Ti)** | 2.8 | 3.1 | Primary precipitation hardening element (forms γ' phase) | | **Aluminum (Al)** | - | 0.30 | Secondary precipitation hardener | | **Carbon (C)** | 0.10 | 0.20 | Forms carbides for grain boundary stabilization | | **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 | 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 - 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 * **Creep Rupture Strength (540°C/1000°F):** 520 MPa (75 ksi) for 1000 hours * **Burst Pressure:** Varies with diameter and wall thickness --- #### **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 * **AMS 5580:** Seamless Tubing, Corrosion and Heat-Resistant **Material Specifications:** * **ASTM B637:** Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock * **AMS 5660:** Nickel Alloy, Corrosion and Heat-Resistant **Dimensional Standards:** * **ASTM B751:** General Requirements for Nickel and Nickel Alloy Seamless and Welded Tube * **ASME SB163:** Nuclear and high-temperature service applications **International Equivalents:** * **UNS:** N09901 * **EN:** NiCr13Mo6Fe6Ti * **DIN:** 2.4662 * **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, pilgered * **Welded Tube:** Generally not recommended due to welding challenges **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** **Aerospace Industry:** * Gas turbine engine fuel injector tubes * Afterburner fuel lines * Hydraulic and pneumatic system tubing * Thermal management system components **Power Generation:** * High-pressure steam tubes * Heat exchanger tubing * Superheater and reheater tubes * Boiler pressure tubes **Oil & Gas Industry:** * Downhole instrumentation tubing * High-pressure hydraulic lines * Thermal recovery system tubing * Subsea control system tubing **Industrial Applications:** * High-temperature furnace tubing * Heat treatment fixture components * Nuclear reactor instrumentation tubes * Chemical processing equipment --- #### **9. Processing & Fabrication** **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 **Fabrication Notes:** * **Tube Bending:** Cold bending with mandrel for tight radii * **Flaring/Flanging:** Possible with proper tooling and annealing * **Machining:** Use carbide tools with positive rake geometry * **Cleaning:** Avoid chloride-containing agents to prevent stress corrosion --- #### **10. Quality Assurance & Testing** * **Certification:** Full traceability with mill certifications * **Non-Destructive Testing:** - Eddy Current Testing per ASTM E309 - Ultrasonic Testing per ASTM A388 - Liquid Penetrant Testing per ASTM E165 * **Destructive Testing:** - Tensile tests at room and elevated temperatures - Flattening, flare, and flange tests - Hardness surveys and microstructural analysis * **Dimensional Inspection:** - OD, ID, and wall thickness verification - Ovality and straightness checks - Surface finish evaluation --- **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. 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 1953 gallon liquid totes Special package is available on request.