Alloy 801,Incoloy 801 Fittings,UNS N08801,E FORU

British Specs:，American Specs: AMS 5552 Sheet, Strip and Plate，German Specs:

### **Product Introduction: Alloy 801 / Incoloy 801 / UNS N08801 Fittings** **Overview** Alloy 801 (Incoloy 801) is a nickel-iron-chromium alloy stabilized with titanium, renowned for its exceptional high-temperature strength and resistance to oxidation and carburization. **Incoloy 801 Fittings** are precision-engineered components designed to connect pipes and tubes in aggressive high-temperature systems. These fittings maintain structural integrity and corrosion resistance in continuous service up to 1100°C (2012°F), making them indispensable for critical applications in the petrochemical, power generation, and heat-treating industries. Common types include elbows, tees, reducers, caps, and stub ends, manufactured to ensure leak-proof and durable connections in demanding environments. **Key Characteristics of Fittings** * **Excellent High-Temperature Strength:** Resists creep and deformation under mechanical loads at elevated temperatures. * **Superior Oxidation & Carburization Resistance:** Withstands scaling in air and prevents carbon absorption in carburizing atmospheres, extending service life. * **Outstanding Intergranular Corrosion Resistance:** The titanium stabilization prevents sensitization of the alloy during welding and high-temperature exposure. * **Good Weldability:** Can be readily welded to matching or similar alloys using common techniques like TIG and MIG, ensuring strong, integral joints. * **Long Service Life:** Provides reliable performance in thermal cycling conditions, reducing maintenance downtime and costs. --- ### **Chemical Composition (Weight %)** The chemical composition of UNS N08801 fittings conforms to strict international standards to ensure consistent performance. | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 30.0 - 34.0 | | **Chromium (Cr)** | 19.0 - 22.0 | | **Iron (Fe)** | Balance | | **Carbon (C)** | 0.05 - 0.10 | | **Titanium (Ti)** | 0.15 - 0.60 | | **Aluminum (Al)** | ≤ 0.30 | | **Manganese (Mn)** | ≤ 1.50 | | **Silicon (Si)** | ≤ 1.00 | | **Copper (Cu)** | ≤ 0.75 | | **Sulfur (S)** | ≤ 0.015 | *The balance is Iron (Fe). Composition is controlled for optimal high-temperature performance and weldability.* --- ### **Physical Properties** The physical properties are fundamental for design and engineering calculations involving thermal expansion and heat transfer. | Property | Value | | :--- | :--- | | **Density** | 7.95 g/cm³ (0.287 lb/in³) | | **Melting Range** | 1350 - 1400 °C (2460 - 2550 °F) | | **Specific Heat (20°C)** | 450 J/kg·K | | **Thermal Conductivity (20°C)** | 11.9 W/m·K | | **Mean Coefficient of Thermal Expansion (20-1000°C)** | 14.7 x 10⁻⁶ /°C | --- ### **Mechanical Properties (Typical for Annealed Material)** The mechanical properties of the fittings are derived from the wrought material from which they are formed. | Property | Value | | :--- | :--- | | **Tensile Strength** | ≥ 520 MPa (75 ksi) | | **Yield Strength (0.2% Offset)** | ≥ 205 MPa (30 ksi) | | **Elongation** | ≥ 30% | --- ### **Product Applications** Incoloy 801 fittings are critical components in high-temperature piping systems across various industries: * **Petrochemical & Chemical Processing:** * Transfer lines for ethylene and steam methane reformer systems. * Fittings in furnace outlet pipes, catalyst transport lines, and reactor feed systems. * Piping systems exposed to carburizing atmospheres. * **Power Generation:** * High-temperature steam lines, boiler tubing, and superheater systems. * Heat exchanger piping in nuclear and fossil fuel plants. * **Industrial Heating & Heat Treating:** * Radiant tube assemblies, recuperator piping, and fan cooling systems. * Piping for carburizing and neutral hardening furnaces. * **Pollution Control:** * Ducting and connector systems in high-temperature flue gas applications. --- ### **International Standards** Incoloy 801 fittings are manufactured to conform to a range of dimensional and material standards to ensure global interoperability and quality. | Standard Type | Standard Number | Title / Specification | | :--- | :--- | :--- | | **Material Standard** | **ASTM B366 / ASME SB-366** | Standard Specification for Factory-Made Wrought Nickel and Nickel Alloy Fitting | | **Material Standard** | **ASTM B163 / ASME SB-163** | Standard Specification for Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes | | **Material Standard** | **ASTM B167 / ASME SB-167** | Standard Specification for Seamless Nickel-Chromium-Iron Alloy Pipe & Tube | | **Dimensional Standard (Butt-Weld)** | **ASME B16.9** | Factory-Made Wrought Buttwelding Fittings | | **Dimensional Standard (Butt-Weld)** | **MSS SP-43** | Wrought Stainless Steel Buttwelding Fittings | | **Dimensional Standard (Socket-Weld)** | **ASME B16.11** | Forged Fittings, Socket-Welding and Threaded | | **UNS Designation** | **N08801** | Unified Numbering System | | **Werkstoff Number** | **1.4875** | German material identification number | **Note:** Fittings are typically supplied to **ASTM B366**, which governs the material and quality of factory-made wrought fittings. The dimensional standards like **ASME B16.9** (for buttweld) and **ASME B16.11** (for socketweld/threaded) define the sizes and tolerances. --- **Disclaimer:** The information provided is for reference purposes. The properties and capabilities of fittings can be influenced by the specific manufacturing process, size, and wall thickness. For critical applications, always consult the manufacturer's data sheets and the complete, latest version of the relevant ASTM, ASME, or other applicable standards.

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 3010 gallon liquid totes Special package is available on request.