Alloy 901,Nimonic 901 Sheet,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 Sheet / 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 requiring exceptional creep resistance and mechanical strength. This datasheet focuses on the **Sheet** product form, which is characterized by its thin, flat configuration and is widely used in aerospace, power generation, and industrial applications where high strength-to-weight ratio and excellent high-temperature performance are critical. Nimonic 901 Sheet maintains outstanding mechanical properties at temperatures up to 590°C (1100°F) and offers good formability in the solution-treated condition. --- #### **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 loading * **Outstanding Thermal Fatigue Resistance:** Excellent resistance to thermal cycling and thermal shock * **Age-Hardenable:** Achieves optimal strength through precipitation hardening heat treatment * **Good Formability:** Can be formed and shaped in the solution-treated condition * **Excellent 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 | 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 - Sheet)** * **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 --- #### **6. International Standards & Specifications** **Sheet Product Standards:** * **AMS 5911:** Nickel Alloy, Corrosion and Heat-Resistant, Sheet, Strip, and Plate * **ASTM B906:** General Requirements for Flat-Rolled Nickel and Nickel Alloy Plate, Sheet, and Strip * **ASTM B409:** Nickel-Iron-Chromium Alloy Plate, Sheet, and Strip **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 **Dimensional Standards:** * **ASTM B906:** Covers dimensional tolerances for sheet products * **ASME SB409:** Nuclear and high-temperature service applications **International Equivalents:** * **UNS:** N09901 * **EN:** NiCr13Mo6Fe6Ti * **DIN:** 2.4662 * **ISO:** 6207 (Nickel alloy sheet) --- #### **7. Product Specifications & Availability** **Sheet Specifications:** * **Thickness Range:** 0.5 mm to 6.0 mm (0.020" to 0.250") * **Width Range:** 600 mm to 1500 mm (24" to 60") * **Length Range:** 1000 mm to 3000 mm (40" to 120") * **Tolerance:** Thickness ±0.05mm to ±0.15mm depending on thickness **Available Conditions:** * **Solution Annealed:** 1095-1120°C (2000-2050°F) * **Solution Treated & Aged:** Fully heat treated ready for service * **Cold Rolled:** For specific applications requiring precise thickness control **Surface Finish:** * **No. 1:** Hot rolled, annealed, and pickled * **No. 2D:** Cold rolled, dull finish * **No. 2B:** Cold rolled, bright finish * **Polished:** Special surface finishes available --- #### **8. Applications** **Aerospace Industry:** * Gas turbine engine components * Afterburner liners and seals * Engine cowlings and fairings * High-temperature shroud components **Power Generation:** * Gas turbine combustion liners * Heat shield components * Exhaust system components * Thermal protection systems **Industrial Applications:** * High-temperature furnace components * Heat treatment fixtures and baskets * Chemical processing equipment liners * Nuclear reactor components **Specific Component Applications:** * Turbine engine seals and gaskets * Combustion chamber components * High-temperature ducting systems * Thermal barrier system substrates --- #### **9. Processing & Fabrication** **Forming Operations:** * **Bending:** Minimum bend radius 2-3 times sheet thickness * **Deep Drawing:** Good deep draw characteristics in annealed condition * **Stretch Forming:** Suitable for complex contours * **Spinning:** Can be spun to shape with proper tooling **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 **Welding Procedures:** * **Weldability:** Fair - requires special precautions * **Recommended Process:** GTAW (TIG) with pulsed current * **Filler Metal:** AWS A5.14 ERNiFeCr-1 * **Preheat Temperature:** 200-300°C (400-570°F) * **Post-Weld Heat Treatment:** Required to restore properties **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:** Full traceability with material certifications * **Non-Destructive Testing:** - Ultrasonic Testing per ASTM A388 - Liquid Penetrant Testing per ASTM E165 - Eddy Current Testing for surface defects * **Destructive Testing:** - Tensile tests at room and elevated temperatures - Hardness surveys - Microstructural analysis and grain size measurement * **Dimensional Inspection:** - Thickness verification at multiple points - Flatness and surface quality evaluation - Edge condition inspection --- **Disclaimer:** This technical information is for reference purposes. For critical applications in aerospace, nuclear, or high-temperature structural 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 sheet 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 1955 gallon liquid totes Special package is available on request.