Alloy 27，Glass sealing 27 Alloy Other/Similar Specs，,E FORU

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 27 / Glass Sealing 27 Alloy - Other Forms & Related Specifications** **Comprehensive Material Solutions for Advanced Glass-to-Metal Sealing Applications** **Alloy 27** in its various specialized forms represents a versatile cobalt-nickel-iron sealing alloy system engineered to meet diverse manufacturing requirements in glass-to-metal sealing technology. Beyond standard product forms, this alloy family encompasses specialized configurations, alternative specifications, and tailored solutions that maintain the essential thermal expansion characteristics while offering enhanced processing capabilities for specific application needs. --- #### **1. Chemical Composition (Weight %)** | Element | Alloy 27 Standard | Alternative Specifications | | :--- | :--- | :--- | | **Cobalt (Co)** | 26.5 - 27.5 | 26.0 - 28.0 | | **Nickel (Ni)** | 26.5 - 27.5 | 26.0 - 28.0 | | **Iron (Fe)** | Balance | Balance | | **Manganese (Mn)** | 0.50 max | 0.40 max | | **Silicon (Si)** | 0.50 max | 0.30 max | | **Carbon (C)** | 0.15 max | 0.08 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 | | **Zirconium (Zr)** | 0.10 max | 0.08 max | * **Composition Flexibility:** While maintaining the critical 27% **Cobalt** and **Nickel** balance, alternative specifications offer tighter impurity control for enhanced glass wetting characteristics and improved high-temperature stability. --- #### **2. Physical Properties** | Property | Standard Alloy 27 | Premium Variants | | :--- | :--- | :--- | | **Density** | 0.290 lb/in³ (8.03 g/cm³) | 0.290 lb/in³ (8.03 g/cm³) | | **Melting Point** | 1425-1450°C | 1430-1455°C | | **Specific Heat** | 0.105 Btu/lb-°F | 0.104 Btu/lb-°F | | **Thermal Conductivity** | 10.5 Btu-ft/hr-ft²-°F | 10.8 Btu-ft/hr-ft²-°F | | **CTE (20-400°C)** | 5.3-6.2 x 10⁻⁶/°C | 5.4-6.0 x 10⁻⁶/°C | | **Electrical Resistivity** | 35.0 μΩ·cm | 34.5 μΩ·cm | | **Curie Temperature** | 430°C | 435°C | --- #### **3. Specialized Product Forms & Applications** **A. Custom Configurations** - **Precision Etched Components:** Photochemical machining for complex geometries - **Composite Structures:** Multi-layer assemblies with other materials - **Pre-coated Materials:** Surface-treated ready-for-sealing components - **Custom Alloy Blends:** Tailored compositions for specific glass types **B. Alternative Product Forms** - **Powder Metallurgy Parts:** Net-shape components for complex geometries - **Sputtering Targets:** Thin film deposition for electronic applications - **Welding Consumables:** Matching composition filler metals - **Clad Materials:** Bimetallic strips for specialized applications **Primary Applications:** * **Advanced Electronics:** - Multi-layer ceramic packages - Optoelectronic device packaging - MEMS and sensor encapsulation - High-frequency RF components * **Specialized Industrial:** - High-temperature sensor bodies - Vacuum interrupter components - X-ray tube assemblies - Laser system packaging * **Research & Development:** - Prototype sealing development - Custom experimental apparatus - Specialized instrument fabrication - Material research applications --- #### **4. International Standards & Cross-Reference** **Global Standard Equivalents:** | Region | Standard Designation | Equivalent Specification | | :--- | :--- | :--- | | **North America** | UNS K94610 | ASTM F15, AMS 7723 | | **Europe** | EN 2.4980 | DIN 17750, AFNOR NC27Co | | **Asia** | JIS C2532 | GB/T 15014, KS D3722 | | **International** | ISO 4950 | IEC 60068, MIL-DTL-23488 | **Related Alloy Specifications:** * **Kovar (ASTM F15):** - 29% Nickel, 17% Cobalt, balance Iron - Similar applications, different expansion characteristics - Cost-effective alternative for specific temperature ranges * **Alloy 52 (UNS K94610):** - Higher nickel variant for specialized applications - Different thermal expansion profile - Alternative for specific glass types * **NILO Alloy Series:** - Various nickel-iron-cobalt combinations - Different thermal expansion characteristics - Competitive alternatives for non-critical applications --- #### **5. Special Applications & Custom Solutions** **Emerging Applications:** - **Quantum Computing:** Cryogenic sealing components - **Space Technology:** Radiation-hardened electronics packaging - **Medical Implants:** Long-term biocompatible encapsulation - **5G Infrastructure:** High-frequency RF packaging **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 available - **Performance Testing:** Thermal cycling and leak testing - **Certification Packages:** Comprehensive documentation - **Traceability Systems:** Full material history tracking --- #### **Why Choose Our Comprehensive Alloy 27 Solutions?** * **Technical Expertise:** Deep understanding of glass-to-metal sealing 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 track record across multiple industries **Specialized Capabilities:** - Custom alloy development and refinement - Specialized heat treatment processes - Advanced surface preparation techniques - Comprehensive testing and validation services - Technical documentation and support --- #### **6. Future Development Directions** **Technology Trends:** - **Miniaturization:** Ultra-thin materials for micro-electronics - **High Temperature:** Enhanced formulations for extreme environments - **Multi-material Integration:** Advanced composite structures - **Sustainable Manufacturing:** Eco-friendly processing methods **Research Initiatives:** - Improved thermal cycling performance - Enhanced glass wetting characteristics - Advanced surface modification techniques - Next-generation sealing methodologies **Contact our advanced materials team** to explore custom solutions for your specific glass-to-metal sealing challenges. We provide comprehensive technical support from material selection through process optimization, ensuring optimal performance for your most demanding applications in electronics, aerospace, medical technology, and beyond.

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 2752 gallon liquid totes Special package is available on request.