Alloy 800,Incoloy 800 Forgings,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

### **Product Datasheet: Alloy 800 / Incoloy 800 / UNS N08800 Forgings** #### **1. Overview** **Alloy 800** (commonly known under the trade name **Incoloy 800** and designated **UNS N08800**) is a nickel-iron-chromium superalloy known for its excellent strength and resistance to oxidation, carburization, and corrosion at elevated temperatures. This datasheet focuses on **forgings** manufactured from this alloy. The forging process involves shaping the metal through localized compressive forces, typically using a hammer or press. This results in a superior product with a refined, uniform grain structure, enhanced mechanical properties, and improved structural integrity compared to cast or fabricated alternatives. Incoloy 800 forgings are essential for the most critical high-stress components in demanding industrial applications. **Key Characteristics of Forgings:** * **Superior Mechanical Properties:** The forging process aligns the grain flow to the part's shape, resulting in higher strength, better impact toughness, and improved fatigue resistance. * **Structural Integrity:** Forgings are free from porosity, shrinkage, cavities, and other defects common in castings. * **Excellent High-Temperature Performance:** Maintains high strength and resists creep and rupture in long-term service up to 1100°F (595°C) and short-term service up to 1500°F (815°C). * **Outstanding Oxidation & Carburization Resistance:** The high chromium and nickel content provides a protective scale, making it ideal for furnace applications. * **Good Fabricability:** Forgings can be subsequently machined and welded using standard techniques. --- #### **2. Chemical Composition (Weight % - Typical)** The chemical composition is tightly controlled to ensure consistent performance in the final forged component. | Element | Content (%) | Role and Effect | | :--- | :--- | :--- | | **Nickel (Ni)** | 30.0 - 35.0 | Provides austenitic structure, ductility, and resistance to chloride stress corrosion cracking and reducing atmospheres. | | **Chromium (Cr)** | 19.0 - 23.0 | Imparts primary resistance to oxidation, sulfidation, and hot corrosion. | | **Iron (Fe)** | Balance (~39.5%) | Forms the base of the alloy. | | **Carbon (C)** | 0.05 - 0.10 | Enhances high-temperature strength and creep resistance. | | **Manganese (Mn)**| ≤ 1.5 | Aids in deoxidation during the melting process. | | **Silicon (Si)** | ≤ 1.0 | Enhances resistance to oxidation and carburization. | | **Sulfur (S)** | ≤ 0.015 | An impurity kept at a minimum to avoid hot shortness and ensure forgeability. | | **Aluminum (Al)** | 0.15 - 0.60 | Combined with Ti, it provides strengthening through gamma prime formation. | | **Titanium (Ti)** | 0.15 - 0.60 | **Crucially stabilizes the alloy** by forming stable carbides, preventing sensitization and intergranular corrosion during thermal cycles. | --- #### **3. Physical Properties (Typical for Wrought & Forged Material)** | 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) | | **Modulus of Elasticity (Tension)** | 29.1 x 10⁶ psi (201 GPa) | --- #### **4. International Standards for Forgings** Incoloy 800 forgings are produced to meet stringent international standards that govern their material quality, heat treatment, and testing requirements. | Region/Organization | Standard Number | Title / Scope | | :--- | :--- | :--- | | **ASTM (USA)** | ASTM B564 | Standard Specification for Nickel Alloy Forgings | | **ASME (USA)** | ASME SB-564 | Equivalent to ASTM B564 for pressure vessel and nuclear components. | | **ASTM / ASME** | ASTM B409 / ASME SB-409 | Standard Specification for Nickel-Iron-Chromium Alloy Plate, Sheet, and Strip (for reference of base material) | | **AECMA (Europe)** | PREN 2157 | Forging stock in heat resisting alloys (European aerospace standard) | | **DIN (Germany)** | DIN 2.4858 | Material Number 1.4876 | | **UNS** | UNS N08800 | Unified Numbering System | --- #### **5. Product Applications** Incoloy 800 forgings are specified for high-integrity components that must withstand extreme pressure, temperature, and corrosive environments. * **Petrochemical & Chemical Processing:** * **Large Valves Bodies & Bonnets:** For critical service in reformer furnaces and ethylene plants. * **Pump Casings & Impellers:** Handling hot, corrosive process streams. * **High-Pressure Fittings & Flanges:** For reactor outlet systems and transfer lines. * **Reactors and Autoclave components.** * **Power Generation:** * **Turbine Components:** Blades, disks, and rings for high-temperature service. * **Valve Bodies** for main steam and feedwater systems. * **Fasteners:** Large bolts, studs, and nuts for high-pressure flanged connections. * **Heat Treating Industry:** * **Furnace Rolls, Trays, and Muffles:** For carburizing and annealing furnaces. * **Fixture Components** requiring high strength at temperature. * **Aerospace & Defense:** * **Engine Rings** and other structural components. **Common Forging Types:** * **Rings** (Open Die / Rolled) * **Bars & Billets** * **Blanks** for machining into complex parts * **Near-Net Shape** forgings to minimize material waste and machining. --- **Conclusion** Alloy 800 / Incoloy 800 (UNS N08800) forgings represent the premium product form for applications demanding the highest level of mechanical reliability and resistance to extreme environments. The forging process imparts unmatched strength and structural integrity, making these components indispensable in the critical pathways of the petrochemical, power generation, and thermal processing industries. Compliance with international standards like ASTM B564 ensures consistent quality and performance.

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 1893 gallon liquid totes Special package is available on request.