Alloy 702,Inconel 702 Other/Similar Specs,UNS N07702,E FORU

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

### **Product Introduction: Alloy 702 / INCONEL® 702 & Related Specifications (UNS N07702)** #### **Overview** INCONEL® 702 (UNS N07702) is a high-performance nickel-chromium-aluminum alloy specifically designed for extreme high-temperature applications. This comprehensive guide covers the standard specifications along with comparable and alternative alloys to assist in material selection and cross-referencing for critical applications requiring exceptional oxidation resistance and high-temperature strength. --- ### **Standard Specification: INCONEL® 702 (UNS N07702)** #### **Key Characteristics** - Precipitation-hardenable nickel-chromium-aluminum alloy - Maximum service temperature: 1200°C (2200°F) - Exceptional oxidation resistance and high-temperature strength - Excellent resistance to carburization and sulfidation - Good thermal stability and fatigue resistance #### **Chemical Composition (Typical % Weight)** | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | Balance | | **Chromium (Cr)** | 14.0-17.0 | | **Aluminum (Al)** | 2.75-3.75 | | **Iron (Fe)** | 0.5-2.5 | | **Titanium (Ti)** | 0.25-0.75 | | **Zirconium (Zr)** | 0.01-0.10 | | **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) | --- ### **International Standard Designations** #### **Primary Specifications** | Standard | Designation | |----------|-------------| | **UNS** | N07702 | | **ASTM** | B168 (Sheet/Plate), B166 (Bar), B517 (Tube) | | **AMS** | 5548 (Sheet/Strip), 5703 (Forgings) | | **EN** | NiCr15Fe7AlTi | | **DIN** | 2.4665 | #### **Industry-Specific Specifications** - **Aerospace:** AMS 5548, AMS 5703 - **Nuclear:** ASME Section III - **Military:** MIL-N-894 - **Pressure Vessel:** ASME SB-168 --- ### **Similar & Alternative Alloys** #### **Direct Competitors** **INCONEL 601 (UNS N06601)** - **Comparison:** Better general oxidation resistance, lower cost - **Limitation:** Lower maximum service temperature (1175°C) - **Applications:** Heat treatment fixtures, radiant tubes **INCONEL 617 (UNS N06617)** - **Comparison:** Higher temperature capability (up to 1100°C) - **Advantage:** Better creep strength and thermal stability - **Applications:** Gas turbine components, heat exchangers **INCONEL 625 (UNS N06625)** - **Comparison:** Superior corrosion resistance, non-age-hardenable - **Advantage:** Excellent weldability and fabrication properties - **Applications:** Chemical processing, marine applications #### **Alternative Materials by Application** **For Higher Temperature Service:** - **HAYNES 230** (up to 1175°C) - **INCONEL 740H** (ultra-supercritical applications) - **NIMONIC 263** (better creep resistance) **For Better Corrosion Resistance:** - **HASTELLOY C-276** (excellent reducing corrosion resistance) - **INCONEL 686** (superior pitting and crevice corrosion resistance) **For Improved Fabricability:** - **INCONEL 600** (good general purpose, non-age-hardenable) - **INCONEL 690** (better corrosion resistance in specific environments) --- ### **Comparative Analysis** #### **Mechanical Properties Comparison** | Alloy | Tensile Strength (MPa) | Yield Strength (MPa) | Max Service Temp (°C) | |-------|------------------------|----------------------|----------------------| | **INCONEL 702** | 830-1000 | 520-670 | 1200 | | **INCONEL 601** | 655-895 | 275-620 | 1175 | | **INCONEL 617** | 685-895 | 275-620 | 1100 | | **INCONEL 625** | 830-1030 | 415-690 | 1095 | #### **Cost-Performance Analysis** | Alloy | Relative Cost | Key Advantage | Best Application | |-------|---------------|---------------|------------------| | **INCONEL 702** | High | Oxidation resistance at extreme temperatures | Heating elements | | **INCONEL 601** | Medium | Balanced properties and cost | General furnace parts | | **INCONEL 617** | High | Creep strength and thermal stability | Gas turbine components | | **INCONEL 625** | Medium-High | Corrosion resistance and fabricability | Chemical processing | --- ### **Specialized Variants & Modifications** #### **Proprietary Modifications** - **INCONEL 702A**: Enhanced version with improved thermal stability - **INCONEL 702 Plus**: Modified chemistry for specific high-temperature applications #### **Industry-Specific Grades** - **Aerospace Grade**: Enhanced cleanliness and property consistency - **Nuclear Grade**: Controlled cobalt and boron content - **Commercial Grade**: Standard industrial specifications - **Electrical Grade**: Optimized for heating element applications --- ### **Global Equivalents & Cross-References** | Country/Region | Equivalent Designation | |----------------|------------------------| | **United States** | UNS N07702, AMS 5548 | | **Europe** | EN NiCr15Fe7AlTi | | **Germany** | DIN 2.4665, W.Nr. 2.4665 | | **Japan** | JIS NCF 80A | | **China** | GB GH80A | | **France** | NC15Fe7MoTiAl | --- ### **Selection Guidelines** #### **Choose INCONEL 702 When:** - Operating temperatures exceed 1100°C (2000°F) - Maximum oxidation resistance is required - Heating element applications are primary - Component will see severe thermal cycling conditions - Carburization resistance is critical #### **Consider Alternatives When:** - **Cost is primary concern**: INCONEL 601 - **Weldability is critical**: INCONEL 625 - **Higher creep strength needed**: INCONEL 617 - **Better general corrosion resistance required**: INCONEL 625 or HASTELLOY C-276 - **Intermediate temperature service**: INCONEL 600 or 601 --- ### **Emerging Alternatives & Future Developments** #### **New Generation Alloys** - **INCONEL 740H**: For ultra-supercritical power plants - **HAYNES 282**: Improved creep strength and fabricability - **VDM 780 Premium**: Advanced nickel-based superalloy #### **Development Trends** - Improved temperature capability beyond 1200°C - Enhanced environmental resistance - Better fabricability and reduced cost - Improved recyclability and sustainability --- ### **Regulatory & Compliance Information** #### **Industry Certifications** - **Aerospace**: NADCAP accredited processing - **Nuclear**: NPT compliance for nuclear applications - **Medical**: ISO 13485 for medical applications - **Quality**: ISO 9001, AS9100 certification #### **Environmental Compliance** - **RoHS**: Compliant - **REACH**: Registered - **Conflict Minerals**: DRC conflict-free - **Sustainability**: Recyclable material --- ### **Technical Support & Resources** #### **Available Services** - Material selection assistance - Technical data sheets and specifications - Fabrication process recommendations - Failure analysis and troubleshooting - Application engineering support #### **Documentation** - Certified Material Test Reports - Material Safety Data Sheets - Process specification compliance certificates - Origin and traceability documentation - Quality assurance certificates --- ### **Why Consider INCONEL 702 & Alternatives?** - **Proven Performance**: Decades of successful application history - **Comprehensive Support**: Complete technical documentation - **Quality Assurance**: Multiple certification options - **Global Availability**: Worldwide supply chain - **Technical Expertise**: Access to application engineering - **Custom Solutions**: Tailored material options **Contact our technical team for assistance in selecting the optimal high-temperature alloy for your specific application requirements. We provide comprehensive support from material selection through final application.** --- *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. Specifications are subject to change without notice.*

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 2986 gallon liquid totes Special package is available on request.