Alloy 801,Incoloy 801 ,UNS N08801,E FORU

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

### **Product Introduction: Alloy 801 / INCOLOY® 801 (UNS N08801)** #### **Overview** INCOLOY® 801 (Alloy 801) is a nickel-iron-chromium alloy specifically designed for high-temperature service in oxidizing and carburizing environments. This austenitic alloy offers excellent resistance to oxidation, carburization, and sulfidation, making it particularly suitable for applications in petrochemical processing, heat treatment equipment, and power generation industries. --- ### **Key Features & Advantages** - **Excellent oxidation resistance** up to 1150°C (2100°F) - **Good resistance to carburization** and sulfidation - **High strength** at elevated temperatures - **Good thermal stability** and structural integrity - **Excellent resistance to thermal cycling** - **Good fabricability** and weldability --- ### **Chemical Composition (Typical % Weight)** | Element | Content (%) | Role in Alloy | |---------|-------------|---------------| | **Nickel (Ni)** | 30.0-35.0 | Provides austenitic structure and corrosion resistance | | **Chromium (Cr)** | 19.0-23.0 | Enhances oxidation and corrosion resistance | | **Iron (Fe)** | Balance | Matrix element | | **Carbon (C)** | 0.05-0.10 | Strength at elevated temperatures | | **Manganese (Mn)** | 1.50 max | - | | **Silicon (Si)** | 1.00 max | Improves oxidation resistance | | **Copper (Cu)** | 0.75 max | - | | **Titanium (Ti)** | 0.15-0.60 | Stabilization against sensitization | | **Aluminum (Al)** | 0.15-0.60 | Improves oxidation resistance | | **Sulfur (S)** | 0.015 max | - | --- ### **Physical Properties** | Property | Value | |---------|-------| | **Density** | 7.95 g/cm³ (0.287 lb/in³) | | **Melting Point** | 1380-1425°C (2515-2600°F) | | **Thermal Conductivity** | 12.5 W/m·K at 20°C | | **Thermal Expansion** | 14.4 μm/m·K at 20-100°C | | **Specific Heat** | 460 J/kg·K at 20°C | | **Modulus of Elasticity** | 200 GPa (29 x 10^6 psi) | | **Electrical Resistivity** | 1.02 μΩ·m at 20°C | --- ### **Mechanical Properties** #### **Room Temperature Properties** | Property | Value | |---------|-------| | **Tensile Strength** | 550-690 MPa (80-100 ksi) | | **Yield Strength (0.2% Offset)** | 240-345 MPa (35-50 ksi) | | **Elongation** | 30-45% | | **Hardness** | RB 75-95 | #### **Elevated Temperature Properties** - **Stress Rupture Strength**: 55 MPa (8 ksi) at 815°C (1500°F) for 100 hours - **Creep Strength**: Good long-term performance at high temperatures - **Thermal Fatigue Resistance**: Excellent performance under thermal cycling - **Scaling Resistance**: Minimal weight gain at high temperatures --- ### **International Standards** | Standard | Specification | Application | |----------|---------------|-------------| | **ASTM** | B163, B164, B366 | Tubes, Rods, Fittings | | **ASME** | SB163, SB164 | Boiler and Pressure Vessel Code | | **UNS** | N08801 | Unified Numbering System | | **DIN** | 1.4875 | German Standard | | **EN** | NiCr32AlTi | European Standard | --- ### **Heat Treatment** **Recommended Heat Treatment:** - **Annealing Temperature**: 980-1065°C (1800-1950°F) - **Cooling**: Rapid cooling (water quenching) recommended - **Stress Relieving**: 870-925°C (1600-1700°F) **Special Considerations:** - Solution annealing for optimum corrosion resistance - Stress relief after welding or severe cold working - Controlled cooling to prevent carbide precipitation --- ### **Product Applications** #### **Petrochemical Industry** - **Ethylene Production**: Cracking furnace tubes and pigtails - **Reformer Furnaces**: Catalyst tubes and outlet headers - **Hydrogen Plants**: Reformer tubes and transfer lines - **Chemical Processing**: High-temperature reactor components #### **Heat Treatment Industry** - **Radiant Tubes**: Carburizing and neutral hardening furnaces - **Retorts and Muffles**: Atmosphere furnace components - **Baskets and Trays**: Heat treatment fixtures - **Furnace Rollers**: Continuous annealing lines #### **Power Generation** - **Heat Recovery Systems**: Boiler tubes and components - **Thermal Processing**: High-temperature ducting and headers - **Waste Heat Boilers**: Tube bundles and supports - **Superheater Tubes**: High-pressure steam systems #### **Industrial Applications** - **Glass Manufacturing**: Forming molds and furnace parts - **Ceramic Production**: Kiln furniture and components - **Steel Processing**: Annealing covers and base plates - **Incineration Systems**: Heat exchanger components --- ### **Corrosion Resistance** #### **Oxidation Resistance** - **Continuous Service**: Up to 1150°C (2100°F) - **Cyclic Oxidation**: Excellent resistance to spalling - **Scaling Resistance**: Forms protective, adherent chromium oxide scale #### **Chemical Resistance** - **Carburization Resistance**: Excellent in hydrocarbon environments - **Sulfidation Resistance**: Good in sulfur-containing atmospheres - **Nitriding Resistance**: Moderate in nitrogen atmospheres - **Chloride Attack**: Limited resistance to chloride stress corrosion --- ### **Fabrication Characteristics** #### **Welding** - **Recommended Methods**: GTAW (TIG), GMAW (MIG), SMAW - **Filler Metals**: INCOLOY 801 or INCONEL 82/182 - **Preheat**: Generally not required - **Post-Weld Heat Treatment**: Recommended for optimum properties #### **Machining** - **Tool Materials**: Carbide tools recommended - **Cutting Speed**: Similar to 300 series stainless steels - **Coolant**: Adequate cooling recommended - **Work Hardening**: Moderate tendency #### **Forming** - **Cold Working**: Good formability in annealed condition - **Hot Working**: 1150-1250°C (2100-2280°F) - **Bending**: Good ductility for forming operations --- ### **Available Product Forms** - Sheet and Plate - Bar and Rod - Pipe and Tube - Wire and Strip - Fittings and Flanges - Forged Components --- ### **Quality Assurance & Testing** #### **Standard Testing** - Chemical analysis verification - Mechanical property testing - Non-destructive examination - Microstructural evaluation #### **Certification** - Mill Test Certificates per EN 10204 3.1/3.2 - Material traceability - Compliance with specified standards --- ### **Why Choose INCOLOY 801?** - **Proven Performance**: Decades of successful high-temperature service - **Cost-Effective**: Balanced performance at competitive cost - **Reliable Supply**: Established manufacturing and supply chain - **Technical Support**: Comprehensive engineering support - **Quality Assurance**: Stringent quality control procedures **Contact us today for technical specifications and application guidance for INCOLOY 801 products.** --- *Disclaimer: INCOLOY® is a registered trademark of Special Metals Corporation. The information provided is for technical reference only. Final material selection should be verified through appropriate testing and engineering analysis for specific applications.*

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 3002 gallon liquid totes Special package is available on request.