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

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

### **Product Introduction: Alloy 702 / INCONEL® 702 Pipe (UNS N07702)** #### **Overview** INCONEL® 702 (UNS N07702) pipe is a high-performance nickel-chromium-aluminum alloy specifically engineered for extreme high-temperature applications requiring exceptional oxidation resistance and structural integrity. This precipitation-hardenable material maintains excellent mechanical properties and corrosion resistance at temperatures up to 1200°C (2200°F), making it ideal for critical piping systems 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 - **Good thermal fatigue resistance** under cycling conditions - **Excellent structural stability** during prolonged high-temperature exposure - **Good weldability** and fabrication characteristics --- ### **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 (Pipe - 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** | B517/B775 | Seamless and Welded Pipe | | **ASME** | SB517/SB775 | Boiler and Pressure Vessel Code | | **UNS** | N07702 | Unified Numbering System | | **DIN** | 2.4665 | German Standard | --- ### **Product Specifications** #### **Pipe Manufacturing Methods** - **Seamless Pipe**: Hot extruded for superior pressure integrity - **Welded Pipe**: Formed and welded with full solution annealing #### **Size Range & Schedules** - **Diameter Range**: 1/8" to 24" NPS - **Wall Thickness**: Schedule 5S to XXS - **Length**: Random lengths (18-24 feet) or cut-to-size - **Pressure Ratings**: 150# to 2500# #### **Surface Conditions** - **Annealed & Pickled**: Standard corrosion-resistant finish - **Bright Annealed**: Superior surface finish for critical applications - **Turned Finish**: Machined surface for dimensional precision --- ### **Heat Treatment** **Standard Heat Treatment for Pipe:** - **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 surface protection --- ### **Product Applications** #### **Industrial Heating & Heat Treatment** - **Radiant Tubes**: Heat treatment furnace applications - **Thermocouple Protection Tubes**: High-temperature sensing systems - **Heat Treatment Furnace Piping**: Atmosphere and vacuum furnaces - **Industrial Oven Ducting**: High-temperature air handling systems #### **Chemical & Petrochemical Processing** - **Reformer Furnace Piping**: Hydrogen production units - **Cracking Furnace Systems**: Ethylene production - **High-Temperature Reactor Piping**: Chemical processing systems - **Waste Heat Recovery Systems**: High-temperature exhaust systems #### **Power Generation** - **Gas Turbine Exhaust Systems**: High-temperature ducting - **Heat Recovery Steam Generators**: High-temperature sections - **Nuclear Applications**: High-temperature instrumentation lines - **Advanced Power Systems**: Supercritical CO₂ systems #### **Aerospace & Defense** - **Rocket Propulsion Systems**: Fuel and oxidizer lines - **Jet Engine Test Facilities**: High-temperature piping systems - **Space Vehicle Systems**: Thermal management piping - **Afterburner Systems**: Military aircraft applications --- ### **Fabrication & Installation** #### **Welding Procedures** - **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 Radii**: Varies with wall thickness and diameter - **Forming Limitations**: Consider work hardening characteristics #### **Installation Best Practices** - **Proper Support Design**: Accommodate thermal expansion - **Gasket Selection**: High-temperature compatible materials - **Bolting Materials**: Matching thermal expansion characteristics - **Alignment**: Minimize installation stresses --- ### **Quality Assurance & Testing** #### **Non-Destructive Examination** - **Hydrostatic Testing**: Pressure testing to applicable standards - **Ultrasonic Testing**: For seamless pipe integrity verification - **Radiographic Testing**: For welded pipe joint quality - **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 pipe 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 Data** #### **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 Pipe?** - **Manufacturing Expertise**: Advanced pipe 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 pipe products. Our engineering team provides comprehensive support from material selection through 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 2979 gallon liquid totes Special package is available on request.