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

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

### **Product Introduction: Alloy 801 / INCOLOY® 801 Tube (UNS N08801)** #### **Overview** INCOLOY® 801 (UNS N08801) tube is a nickel-iron-chromium alloy specifically designed for high-temperature tubular applications requiring exceptional resistance to oxidation, carburization, and thermal cycling. This austenitic alloy maintains excellent mechanical properties and structural integrity at temperatures up to 1150°C (2100°F), making it ideal for critical heat transfer applications in petrochemical processing, heat treatment, and power generation industries. --- ### **Key Features & Advantages** - **Excellent oxidation resistance** up to 1150°C (2100°F) - **Superior resistance to carburization** and sulfidation - **High strength retention** at elevated temperatures - **Excellent thermal fatigue resistance** under cycling conditions - **Good weldability** and fabrication characteristics - **Reliable performance** in aggressive high-temperature environments --- ### **Chemical Composition (Typical % Weight)** | Element | Content (%) | Role in Alloy | |---------|-------------|---------------| | **Nickel (Ni)** | 30.0-35.0 | Provides austenitic structure and high-temperature strength | | **Chromium (Cr)** | 19.0-23.0 | Enhances oxidation and corrosion resistance | | **Iron (Fe)** | Balance | Matrix element providing structural integrity | | **Carbon (C)** | 0.05-0.10 | Improves strength at elevated temperatures | | **Titanium (Ti)** | 0.15-0.60 | Stabilization against sensitization | | **Aluminum (Al)** | 0.15-0.60 | Enhances oxidation resistance | | **Manganese (Mn)** | 1.50 max | - | | **Silicon (Si)** | 1.00 max | Improves high-temperature oxidation resistance | | **Copper (Cu)** | 0.75 max | - | | **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 (Tube - Annealed Condition)** #### **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**: Excellent long-term performance at high temperatures - **Thermal Fatigue Resistance**: Superior performance under thermal cycling - **Pressure Integrity**: Maintains structural stability under high-temperature pressure --- ### **International Standards** | Standard | Specification | Application | |----------|---------------|-------------| | **ASTM** | B163/B407 | Seamless and Welded Tube | | **ASME** | SB163/SB407 | Boiler and Pressure Vessel Code | | **UNS** | N08801 | Unified Numbering System | | **DIN** | 1.4875 | German Standard | | **EN** | NiCr32AlTi | European Standard | --- ### **Product Specifications** #### **Tube Manufacturing Methods** - **Seamless Tube**: Hot extruded or cold pilgered for superior integrity - **Welded Tube**: Formed and welded with full solution annealing #### **Size Range & Dimensions** - **Outside Diameter**: 3mm to 150mm (0.125" to 6") - **Wall Thickness**: 0.5mm to 12mm (0.020" to 0.500") - **Length**: Standard lengths or cut-to-size - **Tolerances**: ASTM E213/ISO 1127 standards #### **Surface Conditions** - **Annealed & Pickled**: Standard corrosion-resistant finish - **Bright Annealed**: Superior surface finish for critical applications - **Cold Drawn**: Smooth surface finish for precision applications --- ### **Heat Treatment** **Standard Heat Treatment for Tube:** - **Annealing Temperature**: 980-1065°C (1800-1950°F) - **Cooling Method**: Rapid cooling (water quenching) - **Soaking Time**: 30 minutes per inch of thickness **Special Considerations:** - Full solution annealing after welding operations - Stress relief annealing for fabricated assemblies - Controlled cooling to prevent carbide precipitation --- ### **Product Applications** #### **Petrochemical Industry** - **Ethylene Cracking Furnaces**: Radiant and convection tubes - **Reformer Furnaces**: Catalyst tubes and reformer bundles - **Hydrogen Plants**: Reformer tubes and heat exchanger tubes - **Heater Systems**: Fired heater tubes and pigtails #### **Heat Treatment Equipment** - **Radiant Tubes**: Carburizing and neutral hardening furnaces - **Retort Systems**: Atmosphere furnace retort tubes - **Heat Exchangers**: Recuperator and heat exchanger tubes - **Muffle Tubes**: Protective atmosphere muffle assemblies #### **Power Generation** - **Heat Recovery Systems**: Waste heat boiler tubes - **Superheaters**: High-temperature steam superheater tubes - **Thermal Oil Systems**: Heat transfer fluid tubes - **Exhaust Systems**: Gas turbine exhaust ducting tubes #### **Industrial Applications** - **Glass Manufacturing**: Regenerator and recuperator tubes - **Steel Processing**: Annealing furnace cooling tubes - **Chemical Processing**: High-temperature reactor tubes - **Incineration Systems**: Waste heat recovery tubes --- ### **Fabrication & Processing** #### **Welding Characteristics** - **Preferred Method**: GTAW (TIG) for optimum quality - **Filler Metals**: INCOLOY 801 or INCONEL 82/182 - **Shielding Gas**: Argon or argon-helium mixtures - **Post-Weld Heat Treatment**: Recommended for optimal properties #### **Forming & Bending** - **Cold Bending**: Possible with proper tooling and procedures - **Hot Bending**: Recommended for tight radii and heavy walls - **Minimum Bend Radii**: 2x OD for thin walls, 3x OD for heavy walls - **Forming Limitations**: Consider work hardening characteristics #### **Machining Operations** - **Tool Selection**: Carbide tools recommended - **Cutting Parameters**: Moderate speeds with positive rake angles - **Coolant Requirements**: Adequate cooling essential - **Chip Control**: Proper chip breakers required --- ### **Quality Assurance & Testing** #### **Non-Destructive Examination** - **Hydrostatic Testing**: Pressure testing to applicable standards - **Ultrasonic Testing**: For seamless tube integrity verification - **Eddy Current Testing**: For quality assurance of tubular products - **Dye Penetrant Testing**: For surface defect detection #### **Destructive Testing** - **Tensile Testing**: Mechanical property verification - **Flattening Test**: For ductility and soundness evaluation - **Reverse Bend Testing**: For welded tube quality assessment - **Hardness Testing**: Uniformity verification #### **Certification & Documentation** - **Mill Test Certificates**: EN 10204 3.1/3.2 - **Material Traceability**: Full heat-to-part tracking - **Process Documentation**: Complete manufacturing records - **Compliance Certificates**: International standard certification --- ### **Performance Characteristics** #### **Oxidation Resistance** - **Continuous Service**: Up to 1150°C (2100°F) - **Cyclic Oxidation**: Excellent resistance to spalling - **Scaling Resistance**: Minimal weight gain at high temperatures - **Surface Stability**: Forms protective, adherent chromium oxide scale #### **Corrosion 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 --- ### **Why Choose Our INCOLOY 801 Tube?** - **Manufacturing Expertise**: Advanced tube production technology - **Quality Assurance**: Comprehensive testing and certification - **Technical Support**: Application engineering expertise - **Global Standards Compliance**: Certified to international specifications - **Proven Performance**: Established track record in critical applications - **Custom Solutions**: Tailored dimensions and processing options **Contact us today for technical specifications and quotation for INCOLOY 801 tube products. Our engineering team provides comprehensive support from material selection through fabrication and installation.** --- *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 3006 gallon liquid totes Special package is available on request.