Alloy 800,Incoloy 800 Strip,N08800,E FORU

British Specs:BS 3072 BS 3073 BS 3074 BS 3075 BS 3076 NA15，American Specs:AMS 5766 Bar and Forgings AMS 5871 Sheet, Strip and Plate ASTM B408 ASTM B564 ASTM A240 ASTM A480，German Specs:WS 1.4876 WS 1.4958 WS 1.4959

### **Alloy 800 / Incoloy 800 / UNS N08800 Strip - Product Introduction** **Overview** Alloy 800 (commonly known by its trade name **Incoloy 800** and UNS designation **N08800**) is a widely used nickel-iron-chromium superalloy known for its excellent resistance to oxidation and carburization at high temperatures. It is designed to retain high strength and resist corrosion under various demanding conditions, particularly in oxidizing, reducing, and nitriding atmospheres. Its stability is derived from a controlled combination of iron, nickel, and chromium, stabilized with titanium. This product datasheet focuses on Alloy 800 in the form of strip, a thin, flat-rolled product used in applications requiring precise dimensions and high surface quality. **Key Characteristics** * **Excellent High-Temperature Strength:** Maintains mechanical properties in long-term service at temperatures up to 1100°F (595°C) and short-term service up to 1500°F (815°C). * **Outstanding Oxidation Resistance:** Forms a protective, adherent chromium oxide scale, providing exceptional resistance to scaling and spalling. * **Resistance to Carburization & Sulfidation:** Highly resistant to damaging atmospheres encountered in petrochemical and heat-treating industries. * **Good Corrosion Resistance:** Performs well in aqueous corrosion environments, including various acids, alkalis, and seawater. * **Stability:** The addition of titanium stabilizes the alloy against sensitization and intergranular corrosion. --- #### **1. Chemical Composition (Weight % - Typical)** The chemical composition is precisely controlled to ensure consistent performance. Key elements include: | Element | Content (%) | Role and Effect | | :--- | :--- | :--- | | **Nickel (Ni)** | 30.0 - 35.0 | Provides austenitic structure, ductility, and resistance to reducing atmospheres. | | **Chromium (Cr)** | 19.0 - 23.0 | Imparts oxidation, sulfidation, and corrosion resistance. | | **Iron (Fe)** | Balance (~39.5%) | Forms the base of the alloy, providing solid solution strength. | | **Carbon (C)** | 0.05 - 0.10 | Contributes to high-temperature strength. | | **Manganese (Mn)**| ≤ 1.5 | Aids in deoxidation during melting. | | **Silicon (Si)** | ≤ 1.0 | Enhances resistance to oxidation and carburization. | | **Sulfur (S)** | ≤ 0.015 | Impurity, kept low to avoid hot shortness. | | **Copper (Cu)** | ≤ 0.75 | - | | **Aluminum (Al)** | 0.15 - 0.60 | Combined with Ti, it provides strengthening through gamma prime formation. | | **Titanium (Ti)** | 0.15 - 0.60 | Stabilizes the alloy against sensitization by forming carbides. | *Note: The ratio of (Ti + Al) to Carbon is critical and is typically controlled to be ≥ 12.* --- #### **2. Physical Properties** The following are typical physical properties for Alloy 800 strip. | Property | Value | | :--- | :--- | | **Density** | 0.29 lb/in³ (8.03 g/cm³) | | **Melting Point** | 2470-2520°F (1355-1385°C) | | **Specific Heat** (68°F / 20°C) | 0.11 Btu/lb·°F (460 J/kg·K) | | **Thermal Conductivity** (68°F / 20°C) | 6.8 Btu·in/hr·ft²·°F (11.5 W/m·K) | | **Mean Coefficient of Thermal Expansion** (70-1000°F / 20-540°C) | 8.9 x 10⁻⁶/°F (16.0 x 10⁻⁶/°C) | | **Electrical Resistivity** (68°F / 20°C) | 39.3 μΩ·in (1.00 μΩ·m) | | **Modulus of Elasticity (Elastic Modulus)** | 29.1 x 10⁶ psi (201 GPa) | --- #### **3. International Standards** Alloy 800 strip and sheet are covered by numerous international standards, which specify requirements for chemical composition, mechanical properties, and dimensions. | Region/Organization | Standard Number | Title / Scope | | :--- | :--- | :--- | | **ASTM (USA)** | ASTM B409 | Standard Specification for Nickel-Iron-Chromium Alloy Plate, Sheet, and Strip | | **ASME (USA)** | ASME SB-409 | Equivalent to ASTM B409 for pressure vessel and boiler applications. | | **UNS** | UNS N08800 | Unified Numbering System designation. | | **DIN (Germany)** | DIN 2.4858 / DIN 17742 | Material Number 1.4876; Strip and foil. | | **EN (Europe)** | EN 10095 | Heat resisting steels and nickel alloys. | | **GOST (Russia)** | GOST EI 695 | - | --- #### **4. Product Applications** Due to its robust combination of properties, Alloy 800 strip is specified for a wide range of demanding applications across various industries: * **Heat Treating Industry:** * Radiant tubes, muffles, retorts, and furnace baskets. * Heat exchanger components. * **Power Generation:** * Superheater and reheater tubing in fossil fuel power plants. * Heat exchangers and tubing for nuclear power systems. * **Chemical & Petrochemical Processing:** * Catalyst support grids in reformer furnaces. * Components for ethylene pyrolysis furnaces. * Equipment handling hot nitric acid and nitrates. * **Industrial Heating:** * Heating element sheathing for electric resistance heaters. * Thermowells and high-temperature thermocouple protection tubes. * **Other Applications:** * Fasteners and springs for high-temperature service. * Architectural and marine applications requiring corrosion resistance. --- **Conclusion** Alloy 800 / Incoloy 800 / N08800 strip is a versatile, high-performance material chosen for its exceptional strength and resistance to oxidation, carburization, and corrosion at elevated temperatures. Its compliance with major international standards makes it a reliable and globally accepted solution for critical components in the power, chemical, and heat processing industries.

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 1891 gallon liquid totes Special package is available on request.