Alloy 901,Incoloy 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 / Incoloy 901 Sheet / 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 applications requiring exceptional creep resistance and mechanical strength. This datasheet focuses on the **Sheet** product form, characterized by its thin, flat configuration typically supplied in thicknesses up to 6mm. Incoloy 901 Sheet combines excellent high-temperature properties with good formability, making it ideal for aerospace, power generation, and industrial applications where high strength-to-weight ratio and superior performance at temperatures up to 590°C (1100°F) are critical requirements. --- #### **2. Key Characteristics** * **Excellent High-Temperature Strength:** Maintains mechanical properties at temperatures up to 590°C (1100°F) * **Outstanding Creep Resistance:** Superior long-term creep rupture strength under sustained loading * **Excellent Thermal Fatigue Resistance:** Withstands cyclic thermal stresses 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 * **Good Weldability:** Can be welded using proper procedures and techniques --- #### **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 - 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 * **Impact Strength:** 35-50 J (26-37 ft-lb) * **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 * **JIS:** NCF 901 * **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 improved surface finish and dimensional 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 * **BA (Bright Annealed):** Smooth, reflective surface --- #### **8. Applications** **Aerospace Industry:** * Gas turbine engine components and liners * Afterburner liners and seals * Engine cowlings and fairings * High-temperature shroud components * Heat shield and thermal protection systems **Power Generation:** * Gas turbine combustion liners * Heat shield components * Exhaust system components * Thermal protection system panels * Boiler and heat exchanger components **Industrial Applications:** * High-temperature furnace components * Heat treatment fixtures and baskets * Chemical processing equipment liners * Nuclear reactor components * High-temperature ducting systems **Specific Component Applications:** * **Thin-Wall Structures:** Lightweight high-temperature components * **Heat Exchangers:** Plate-type heat exchanger sheets * **Protective Liners:** Corrosion and heat-resistant linings * **Structural Panels:** High-temperature enclosure panels --- #### **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 and aircraft components * **Spinning:** Can be spun to shape with proper tooling * **Press Forming:** Suitable for high-volume production **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 * **Tool Geometry:** Positive rake angles recommended **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) * **Interpass Temperature:** 150-200°C (300-400°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 * **Stress Relieving:** 650-675°C (1200-1250°F) for 1-2 hours --- #### **10. Quality Assurance & Testing** **Material Certification:** * Full traceability from melt to final product * Certified Mill Test Reports (CMTR) * Heat treatment charts and records * Chemical analysis certificates **Non-Destructive Testing:** * **Ultrasonic Testing (UT):** Per ASTM A388 for internal quality * **Liquid Penetrant Testing (PT):** Per ASTM E165 for surface defects * **Eddy Current Testing:** For surface and near-surface defects * **Visual Inspection:** Per ASTM A480 **Destructive Testing:** * **Tensile Testing:** At room and elevated temperatures per ASTM E8 * **Hardness Surveys:** Multiple locations across sheet surface * **Bend Tests:** For formability assessment * **Microstructural Analysis:** Grain size and phase distribution **Dimensional Inspection:** * Thickness verification at multiple points * Flatness and surface quality assessment * Width and length verification * Surface finish measurement --- **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 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 1968 gallon liquid totes Special package is available on request.