Alloy 800,Incoloy 800 ,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

### **Technical Datasheet: Alloy 800 / Incoloy® 800 (UNS N08800)** --- #### **1. Product Overview** **Alloy 800**, commercially known as **Incoloy® 800**, is a nickel-iron-chromium superalloy designed for excellent strength and corrosion resistance at high temperatures. Designated as **UNS N08800**, this austenitic alloy offers outstanding resistance to oxidation, carburization, and other forms of high-temperature degradation, making it suitable for service in temperatures up to **1100°C (2012°F)**. --- #### **2. Chemical Composition** | Element | Content (%) | |---------|-------------| | Nickel (Ni) | 30.0–35.0 | | Chromium (Cr) | 19.0–23.0 | | Iron (Fe) | ≥ 39.5 | | Carbon (C) | ≤ 0.10 | | Manganese (Mn) | ≤ 1.50 | | Silicon (Si) | ≤ 1.00 | | Copper (Cu) | ≤ 0.75 | | Sulfur (S) | ≤ 0.015 | | Aluminum (Al) | 0.15–0.60 | | Titanium (Ti) | 0.15–0.60 | *Note: The combination of Al + Ti is maintained between 0.85–1.20%* --- #### **3. Physical Properties** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | Density | 7.94 g/cm³ | 0.286 lb/in³ | | Melting Point | 1350–1400°C | 2462–2552°F | | Specific Heat (20°C) | 500 J/kg·K | 0.12 Btu/lb·°F | | Thermal Conductivity (20°C) | 11.7 W/m·K | 81.2 Btu·in/hr·ft²·°F | | Mean Coefficient of Thermal Expansion (20–100°C) | 14.0 μm/m·°C | 7.8 × 10⁻⁶ in/in·°F | | Modulus of Elasticity | 200 GPa | 29.0 × 10⁶ psi | | Electrical Resistivity | 0.99 μΩ·m | 601 ohm·cir mil/ft | --- #### **4. Mechanical Properties** **Room Temperature Properties (Annealed Condition):** | Property | Typical Value | |----------|---------------| | Tensile Strength | 520–690 MPa (75–100 ksi) | | Yield Strength (0.2% Offset) | 210–345 MPa (30–50 ksi) | | Elongation | 30–50% | | Hardness (Rockwell B) | 75–95 HRB | **Elevated Temperature Properties:** - Maintains excellent creep rupture strength up to 700°C (1290°F) - Good stress rupture properties at high temperatures --- #### **5. International Standards** | Standard Body | Standard Number | Product Forms | |---------------|-----------------|---------------| | ASTM International | ASTM B409 | Plate, Sheet, and Strip | | ASTM International | ASTM B564 | Forgings | | ASTM International | ASTM B163 | Seamless Tubes | | ASTM International | ASTM B165 | Seamless Pipe | | ASME | SB-409, SB-564 | Pressure Vessel Components | | EN | EN 10095 | X5NiCrAlTi31-20 | | DIN | DIN 2.4858 | Material Designation | --- #### **6. Product Applications** **Heat Treatment Industry:** - Radiant tubes and retorts - Heat treatment baskets and fixtures - Furnace muffles and internals - Carburizing and annealing equipment **Chemical & Petrochemical Processing:** - Ethylene cracking furnace tubes - Steam methane reformer components - High-temperature heat exchangers - Process piping and transfer lines **Power Generation:** - Heat recovery steam generators - Superheater and reheater tubes - Nuclear steam generator tubing - Gas turbine components **Other Applications:** - Industrial heating elements - Thermal processing equipment - Aerospace components - Fasteners and springs for high-temperature service --- #### **7. Key Features & Benefits** - **Excellent oxidation resistance** up to 1100°C - **Good carburization resistance** - **High strength** at elevated temperatures - **Good thermal stability** - **Excellent fabricability** and weldability - **Resistance to sulfur attack** --- #### **8. Corrosion Resistance** - Outstanding resistance to oxidation at high temperatures - Good resistance to carburizing atmospheres - Suitable for use in sulfur-free environments - Resists chloride stress corrosion cracking - Good performance in various corrosive gases --- #### **9. Fabrication Characteristics** - **Weldability**: Excellent using common processes (GTAW, GMAW, SMAW) - **Hot Working**: 950–1200°C (1740–2190°F) - **Cold Working**: Good ductility permits cold forming - **Heat Treatment**: Solution anneal at 1100–1175°C (2010–2150°F) - **Machinability**: Similar to other austenitic alloys --- #### **10. Available Product Forms** - Plate, Sheet, Strip - Bar, Rod, Wire - Seamless and Welded Tubes - Pipe and Fittings - Forgings and Fasteners --- **Disclaimer:** *Incoloy® is a registered trademark of Special Metals Corporation. This information is for reference purposes only. For specific applications, always consult the appropriate material standards and manufacturer's technical data sheets. Performance in actual service conditions should be verified through appropriate testing.*

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 1884 gallon liquid totes Special package is available on request.