Alloy 702,Inconel 702 Tube,UNS N07702,E FORU

British Specs:，American Specs: AMS 5550 Sheet, Strip and Plate，German Specs:

### **Product Introduction: Alloy 702 / INCONEL® 702 Tube (UNS N07702)** #### **Overview** INCONEL® 702 (UNS N07702) tube is a high-performance nickel-chromium-aluminum alloy specifically designed for extreme high-temperature applications. This precipitation-hardenable material offers exceptional oxidation resistance, excellent high-temperature strength, and superior structural stability at temperatures up to 1200°C (2200°F), making it ideal for critical tubular applications in aggressive thermal environments. --- ### **Key Features & Advantages** - **Exceptional oxidation resistance** up to 1200°C (2200°F) - **Excellent high-temperature strength** and creep rupture properties - **Superior resistance to carburization** and sulfidation - **Outstanding thermal fatigue resistance** under cycling conditions - **Good weldability** and fabrication characteristics - **Excellent structural stability** during prolonged high-temperature exposure --- ### **Chemical Composition (Typical % Weight)** | Element | Content (%) | Role in Alloy | |---------|-------------|---------------| | **Nickel (Ni)** | Balance | Matrix element providing high-temperature strength | | **Chromium (Cr)** | 14.0-17.0 | Primary oxidation resistance | | **Aluminum (Al)** | 2.75-3.75 | Forms protective alumina scale | | **Iron (Fe)** | 0.5-2.5 | - | | **Titanium (Ti)** | 0.25-0.75 | Precipitation hardening element | | **Zirconium (Zr)** | 0.01-0.10 | Enhances oxidation resistance | | **Manganese (Mn)** | 0.50 max | - | | **Silicon (Si)** | 0.50 max | - | | **Copper (Cu)** | 0.50 max | - | | **Carbon (C)** | 0.05 max | - | --- ### **Physical Properties** | Property | Value | |---------|-------| | **Density** | 7.95 g/cm³ (0.287 lb/in³) | | **Melting Point** | 1370-1425°C (2500-2600°F) | | **Thermal Conductivity** | 15.1 W/m·K at 20°C | | **Thermal Expansion** | 14.2 μm/m·K at 20-100°C | | **Specific Heat** | 460 J/kg·K at 20°C | | **Electrical Resistivity** | 1.18 μΩ·m at 20°C | | **Modulus of Elasticity** | 221 GPa (32 x 10^6 psi) | --- ### **Mechanical Properties (Tube - Aged Condition)** #### **Room Temperature Properties** | Property | Value | |---------|-------| | **Tensile Strength** | 830-1000 MPa (120-145 ksi) | | **Yield Strength (0.2% Offset)** | 520-670 MPa (75-97 ksi) | | **Elongation** | 18-28% | | **Hardness** | HRB 90-100 | #### **Elevated Temperature Properties** - **Stress Rupture Strength**: 55 MPa (8 ksi) at 980°C (1800°F) for 100 hours - **Creep Strength**: Excellent long-term performance at high temperatures - **Thermal Fatigue Resistance**: Superior performance under thermal cycling - **Pressure Retention**: Maintains integrity under high-temperature pressure --- ### **International Standards** | Standard | Specification | Application | |----------|---------------|-------------| | **ASTM** | B516/B517 | Seamless and Welded Tube | | **ASME** | SB516/SB517 | Boiler and Pressure Vessel Code | | **UNS** | N07702 | Unified Numbering System | | **DIN** | 2.4665 | German Standard | | **AMS** | AMS 5581 | Seamless Tube | --- ### **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:** - **Solution Treatment**: 1150-1200°C (2100-2200°F), rapid cooling - **Aging Treatment**: 800-850°C (1470-1560°F) for 16-24 hours, air cooling **Special Considerations:** - Full solution annealing after welding operations - Stress relief annealing for fabricated assemblies - Controlled atmosphere heat treatment for optimal surface quality --- ### **Product Applications** #### **Industrial Heating & Heat Treatment** - **Radiant Tubes**: Heat treatment furnace applications - **Thermocouple Protection Tubes**: High-temperature sensing systems - **Heat Treatment Furnace Components**: Atmosphere and vacuum furnaces - **Industrial Heating Elements**: High-temperature electric heating elements #### **Chemical & Petrochemical Processing** - **Reformer Furnace Tubes**: Hydrogen production units - **Cracking Furnace Tubes**: Ethylene production - **High-Temperature Reactor Tubes**: Chemical processing systems - **Heat Exchanger Tubes**: High-temperature service #### **Aerospace & Defense** - **Rocket Engine Components**: Combustion chambers and nozzles - **Jet Engine Components**: Afterburner liners and exhaust systems - **Space Vehicle Systems**: Propellant handling and thermal management - **Military Applications**: High-temperature hydraulic lines #### **Power Generation** - **Nuclear Applications**: Core instrumentation tubes - **Gas Turbine Systems**: Heat exchanger components - **Waste Heat Recovery**: Boiler and heat recovery tubes - **Advanced Energy Systems**: Solar thermal power components #### **Specialized Applications** - **Glass Manufacturing**: Forming and processing equipment - **Semiconductor Processing**: High-temperature diffusion tubes - **Research Equipment**: High-temperature test apparatus - **Medical Equipment**: Sterilization and processing systems --- ### **Fabrication & Processing** #### **Welding Characteristics** - **Preferred Method**: GTAW (TIG) for optimum quality - **Filler Metal**: INCONEL Filler Metal 72 - **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 Radios**: 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 1200°C (2200°F) - **Cyclic Oxidation**: Excellent resistance to spalling - **Scaling Resistance**: Minimal weight gain at high temperatures - **Surface Stability**: Forms protective, adherent oxide layer #### **Corrosion Resistance** - **Carburization Resistance**: Excellent in hydrocarbon environments - **Sulfidation Resistance**: Good performance in sulfur-containing atmospheres - **Chloride Resistance**: Moderate resistance to chloride attack - **Nitriding Resistance**: Good performance in nitrogen atmospheres --- ### **Why Choose Our INCONEL 702 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 INCONEL 702 tube products. Our engineering team provides comprehensive support from material selection through fabrication and installation.** --- *Disclaimer: INCONEL® 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 2980 gallon liquid totes Special package is available on request.