Alloy 702,Inconel 702 ,UNS N07702,E FORU

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

### **Product Introduction: Alloy 702 / INCONEL® 702 (UNS N07702)** #### **Overview** INCONEL® 702 (Alloy 702) is a high-temperature nickel-chromium alloy specifically designed for outstanding oxidation resistance and strength at elevated temperatures. This precipitation-hardenable alloy offers excellent mechanical properties and structural stability at temperatures up to 1200°C (2200°F), making it particularly suitable for high-temperature industrial heating elements and furnace components. --- ### **Key Features & Advantages** - **Exceptional oxidation resistance** up to 1200°C (2200°F) - **Good high-temperature strength** and structural stability - **Excellent resistance to carburization** and other high-temperature corrosive environments - **Good fabricability** and weldability - **High electrical resistivity** for heating element applications - **Excellent thermal fatigue resistance** --- ### **Chemical Composition (Typical % Weight)** | Element | Content (%) | Role in Alloy | |---------|-------------|---------------| | **Nickel (Ni)** | Balance | Provides oxidation resistance and matrix strength | | **Chromium (Cr)** | 14.0-17.0 | Enhances oxidation resistance | | **Iron (Fe)** | 0.5-2.5 | - | | **Aluminum (Al)** | 2.75-3.75 | Forms protective oxide layer | | **Titanium (Ti)** | 0.25-0.75 | Precipitation hardening element | | **Manganese (Mn)** | 0.50 max | - | | **Silicon (Si)** | 0.50 max | - | | **Copper (Cu)** | 0.50 max | - | | **Carbon (C)** | 0.05 max | - | | **Zirconium (Zr)** | 0.01-0.10 | Improves oxidation resistance | --- ### **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** #### **Room Temperature Properties (Aged Condition)** | Property | Value | |---------|-------| | **Tensile Strength** | 860-1030 MPa (125-150 ksi) | | **Yield Strength (0.2% Offset)** | 550-690 MPa (80-100 ksi) | | **Elongation** | 20-30% | | **Reduction of Area** | 25-40% | | **Hardness** | HRB 95-105 | #### **Elevated Temperature Properties** - **Continuous Service Temperature**: Up to 1200°C (2200°F) - **Stress Rupture Strength**: Excellent at 1000°C (1800°F) - **Creep Strength**: Good resistance to deformation - **Thermal Shock Resistance**: Excellent performance --- ### **International Standards** | Standard | Specification | |----------|---------------| | **UNS** | N07702 | | **ASTM** | B166 (Rod, Bar), B168 (Sheet, Strip) | | **AMS** | AMS 5719 | | **DIN** | 2.4665 | | **EN** | NiCr15Fe7MoTiAl | --- ### **Heat Treatment** **Standard Heat Treatment:** - **Solution Treatment**: 1150-1200°C (2100-2200°F), rapid cooling - **Aging Treatment**: 800-850°C (1470-1560°F) for 16-24 hours **Special Considerations:** - Controlled cooling rates to prevent cracking - Atmosphere control to prevent surface oxidation - Stress relief annealing after fabrication --- ### **Product Applications** #### **Industrial Heating** - **Electrical Heating Elements**: High-temperature furnace elements - **Radiant Tubes**: Heat treatment furnace components - **Heat Treatment Fixtures**: Baskets, trays, and fixtures - **Furnace Components**: Muffles, retorts, and radiant shields #### **Aerospace & Defense** - **Jet Engine Components**: Combustion chamber parts - **Afterburner Components**: High-temperature sections - **Rocket Motor Parts**: Nozzle components - **Exhaust Systems**: High-temperature ducting #### **Industrial Processing** - **Chemical Processing**: High-temperature reactor components - **Glass Manufacturing**: Forming molds and equipment - **Ceramic Processing**: Kiln furniture and components - **Heat Exchangers**: High-temperature sections #### **Specialized Applications** - **Nuclear Reactors**: Core components - **Heat Treating**: Salt pot baskets and fixtures - **Petrochemical**: Reformer furnace components - **Power Generation**: Gas turbine components --- ### **Fabrication Characteristics** #### **Machining** - Can be machined using conventional methods - Carbide tools recommended for optimum results - Adequate cooling and lubrication required - Work hardening requires positive rake angles #### **Welding** - **GTAW (TIG)**: Preferred method - **Matching Filler Metal**: INCONEL Filler Metal 72 - **Pre-heating**: Generally not required - **Post-weld Heat Treatment**: Recommended for optimum properties #### **Forming** - Good hot workability at 1050-1200°C - Cold forming possible in annealed condition - Intermediate annealing may be required for severe forming - Springback consideration important in design --- ### **Oxidation Resistance Performance** #### **High-Temperature Stability** - **Continuous Use**: 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 #### **Comparative Performance** - Superior to most nickel-chromium alloys in oxidation resistance - Better than iron-based alloys in high-temperature applications - Excellent alternative to more expensive cobalt-based alloys --- ### **Available Product Forms** - Rod and bar - Sheet and strip - Wire and filament - Tubing and pipe - Forgings and rings - Custom fabricated components --- ### **Quality Assurance & Testing** #### **Standard Testing** - Chemical analysis verification - Mechanical property testing - Non-destructive examination - Dimensional verification #### **Specialized Testing** - High-temperature oxidation testing - Cyclic thermal testing - Electrical resistivity measurement - Microstructural examination --- ### **Why Choose INCONEL 702?** - **Proven Performance**: Decades of successful high-temperature service - **Reliability**: Consistent quality and properties - **Versatility**: Suitable for various high-temperature applications - **Technical Support**: Comprehensive application engineering - **Global Availability**: Worldwide supply chain support **Contact us today for technical specifications and application guidance for INCONEL 702 alloy products.** --- *Disclaimer: INCONEL® is a registered trademark of Special Metals Corporation. All 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 2976 gallon liquid totes Special package is available on request.