Alloy 39，Low Expansion 39 Alloy Other/Similar Specs，,E FORU

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 39 / Low Expansion 39 Alloy - Other Forms & Related Specifications** **Comprehensive Material Solutions for Advanced Thermal Management Applications** **Alloy 39** represents a specialized category of nickel-iron-cobalt alloys engineered to provide exceptional dimensional stability across various temperature ranges. Beyond standard product forms, this alloy system encompasses specialized configurations, alternative specifications, and tailored solutions that maintain the essential low thermal expansion characteristics while offering enhanced processing capabilities for specific application requirements in precision engineering and thermal management systems. --- #### **1. Chemical Composition (Weight %)** | Element | Standard Alloy 39 | Modified Variants | | :--- | :--- | :--- | | **Nickel (Ni)** | 38.0 - 40.0 | 37.5 - 40.5 | | **Cobalt (Co)** | 14.0 - 16.0 | 13.5 - 16.5 | | **Iron (Fe)** | Balance | Balance | | **Manganese (Mn)** | 0.50 max | 0.40 max | | **Silicon (Si)** | 0.30 max | 0.25 max | | **Carbon (C)** | 0.05 max | 0.03 max | | **Chromium (Cr)** | 0.20 max | 0.15 max | | **Aluminum (Al)** | 0.10 max | 0.08 max | | **Copper (Cu)** | 0.20 max | 0.15 max | * **Composition Flexibility:** While maintaining the critical nickel-cobalt balance for low thermal expansion, modified variants offer enhanced characteristics for specific applications, including improved machinability, better weldability, or enhanced corrosion resistance. --- #### **2. Physical Properties** | Property | Standard Grade | Premium Grade | | :--- | :--- | :--- | | **Density** | 8.17 g/cm³ | 8.17 g/cm³ | | **Melting Point** | 1450°C | 1450°C | | **Thermal Conductivity** | 14.5 W/m·K | 15.0 W/m·K | | **Mean CTE (20-300°C)** | 4.5-5.5 × 10⁻⁶/°C | 4.3-5.2 × 10⁻⁶/°C | | **Electrical Resistivity** | 75 μΩ·cm | 72 μΩ·cm | | **Curie Temperature** | 230°C | 235°C | | **Specific Heat Capacity** | 460 J/kg·K | 465 J/kg·K | --- #### **3. Specialized Product Forms & Applications** **A. Custom Configurations** - **Precision Cast Components:** Investment casting for complex geometries - **Powder Metallurgy Parts:** Net-shape components with controlled porosity - **Clad Materials:** Multi-layer composites for specific thermal requirements - **Surface Modified Components:** Special coatings and treatments **B. Alternative Product Forms** - **Sputtering Targets:** High-purity targets for thin film deposition - **Welding Consumables:** Matching composition filler metals and electrodes - **Thermal Spray Powders:** For surface coating applications - **Metal Injection Molded Parts:** Complex small components **Primary Applications:** * **Advanced Electronics:** - Multi-layer ceramic packages - RF and microwave components - Optoelectronic device packaging - MEMS and sensor encapsulation * **Specialized Industrial:** - Precision mold tools - Laser system components - Measuring equipment structures - Optical instrument frames * **Research & Development:** - Custom experimental apparatus - Specialized research equipment - Prototype development - Material testing components --- #### **4. International Standards & Cross-Reference** **Global Standard Equivalents:** | Region | Standard Designation | Equivalent Specification | | :--- | :--- | :--- | | **North America** | UNS K94670 | ASTM F30, AMS 7725 | | **Europe** | EN 1.3917 | DIN 17470, AFNOR FeNi39Co16 | | **Asia** | JIS C2532 | GB/T 15015, KS D3723 | | **International** | ISO 4950 | IEC 60068, MIL-DTL-23488 | **Related Alloy Specifications:** * **Kovar (ASTM F15):** - 29% Nickel, 17% Cobalt, balance Iron - Different thermal expansion characteristics - Alternative for specific temperature ranges * **Invar 36 (UNS K93600):** - 36% Nickel, balance Iron - Lower thermal expansion coefficient - Different mechanical properties * **Super Invar (UNS K94600):** - 31% Nickel, 5% Cobalt, balance Iron - Ultra-low thermal expansion - Specialized applications --- #### **5. Special Applications & Custom Solutions** **Emerging Applications:** - **Quantum Computing:** Cryogenic system components - **Space Technology:** Satellite thermal management - **Additive Manufacturing:** 3D printed components - **Medical Imaging:** MRI and CT scanner components **Custom Engineering Services:** - **Material Development:** Tailored alloy compositions - **Process Optimization:** Custom heat treatment cycles - **Application Testing:** Performance validation services - **Technical Consulting:** Design and manufacturing support **Quality Assurance Protocols:** - **Advanced Characterization:** SEM/EDS analysis - **Performance Testing:** Thermal cycling and mechanical testing - **Certification Packages:** Comprehensive documentation - **Traceability Systems:** Full material history tracking --- #### **6. Technical Advantages & Future Development** **Key Performance Benefits:** - **Exceptional Thermal Stability:** Maintains dimensional accuracy across temperature ranges - **Proven Reliability:** Extensive track record in critical applications - **Manufacturing Versatility:** Suitable for various processing methods - **Consistent Performance:** Repeatable material properties **Future Development Directions:** - **Enhanced Formulations:** Improved thermal and mechanical properties - **Advanced Processing:** New manufacturing techniques - **Specialized Variants:** Application-specific alloy modifications - **Sustainable Solutions:** Environmentally friendly processing methods **Research Initiatives:** - Improved thermal cycling performance - Enhanced manufacturing characteristics - Advanced joining technologies - Next-generation alloy development --- #### **Why Choose Our Comprehensive Alloy 39 Solutions?** * **Technical Expertise:** Deep understanding of low expansion alloy technology * **Manufacturing Flexibility:** Multiple product forms and custom capabilities * **Quality Leadership:** Stringent quality control and certification * **Innovation Focus:** Continuous development of new solutions * **Global Support:** Worldwide technical service and supply chain * **Proven Performance:** Extensive application experience across industries **Specialized Capabilities:** - Custom alloy development and refinement - Specialized heat treatment processes - Advanced manufacturing techniques - Comprehensive testing and validation - Technical documentation support **Contact our advanced materials team** to explore custom solutions for your specific low expansion alloy requirements. We provide comprehensive technical support from material selection through process optimization, ensuring optimal performance for your most demanding applications in aerospace, electronics, scientific research, and precision engineering.

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 2765 gallon liquid totes Special package is available on request.