Alloy 27，Glass sealing 27 Alloy Strip，,E FORU

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 27 / Glass Sealing 27 Alloy Strip** **Precision Cold-Rolled Strip for Advanced Glass-to-Metal Sealing Applications** **Alloy 27 Strip** is a precision cold-rolled cobalt-nickel-iron alloy specifically engineered for high-volume glass-to-metal sealing applications requiring exceptional dimensional accuracy and consistent material properties. This controlled expansion alloy strip offers superior thermal compatibility with various sealing glasses, making it ideal for automated manufacturing of electronic components, semiconductor devices, and precision instruments where tight tolerances, excellent surface quality, and reliable hermetic sealing are essential. --- #### **1. Chemical Composition (Weight %)** | Element | Content (%) | | :--- | :--- | | **Cobalt (Co)** | 26.5 - 27.5 | | **Nickel (Ni)** | 26.5 - 27.5 | | **Iron (Fe)** | Balance | | **Manganese (Mn)** | 0.50 max | | **Silicon (Si)** | 0.50 max | | **Carbon (C)** | 0.15 max | | **Chromium (Cr)** | 0.20 max | | **Aluminum (Al)** | 0.10 max | | **Copper (Cu)** | 0.20 max | | **Zirconium (Zr)** | 0.10 max | | **Sulfur (S)** | 0.015 max | | **Phosphorus (P)** | 0.015 max | * **Precision Alloy Design:** The exact 27% **Cobalt** and 27% **Nickel** composition ensures perfect thermal expansion matching with borosilicate glasses, while the carefully controlled impurity levels guarantee consistent performance in high-speed stamping and forming operations. --- #### **2. Physical Properties** | Property | Value | | :--- | :--- | | **Density** | 0.290 lb/in³ (8.03 g/cm³) | | **Melting Point** | 1425-1450°C (2600-2640°F) | | **Specific Heat** | 0.105 Btu/lb-°F (440 J/kg-°K) | | **Thermal Conductivity** | 10.5 Btu-ft/hr-ft²-°F (18.1 W/m·K) | | **Mean Coefficient of Thermal Expansion** | 5.3-6.2 x 10⁻⁶/°C (20-400°C) | | **Modulus of Elasticity** | 20 x 10⁶ psi (138 GPa) | | **Electrical Resistivity** | 35.0 μΩ·cm at 20°C | | **Curie Temperature** | 430°C (806°F) | | **Surface Roughness** | 0.10-0.50 μm Ra (controllable) | --- #### **3. Mechanical Properties** | Property | Annealed (Soft) | 1/4 Hard | 1/2 Hard | Full Hard | | :--- | :--- | :--- | :--- | :--- | | **Tensile Strength (ksi)** | 75-85 | 85-100 | 100-120 | 120-140 | | **Yield Strength (ksi)** | 45-55 | 65-80 | 85-100 | 105-125 | | **Elongation (%)** | 35-45 | 25-35 | 15-25 | 5-15 | | **Hardness (HRB)** | 75-82 | 82-88 | 88-95 | 95-102 | | **Vickers Hardness (HV)** | 140-160 | 160-190 | 190-230 | 230-270 | --- #### **4. Product Specifications & Applications** **Strip Specifications:** - **Thickness Range:** 0.001" to 0.060" (0.025mm to 1.52mm) - **Width Range:** 0.125" to 12" (3.17mm to 304.8mm) - **Coil Weight:** 100 lbs to 2000 lbs (45 kg to 900 kg) - **Tolerance:** ±0.0001" thickness, ±0.002" width - **Edge Condition:** Slit edge, round edge, or custom profiles **Primary Applications:** * **Electronic Components:** - IC lead frames and terminals - Semiconductor package components - Connector pins and contacts - Hybrid circuit substrates * **Automotive Electronics:** - Sensor mounting strips - Control module components - Ignition system parts - Electronic housing elements * **Medical Devices:** - Implantable device components - Surgical instrument parts - Diagnostic equipment elements - Medical sensor substrates * **Consumer Electronics:** - Miniature relay components - Switch contact strips - Precision spring contacts - Miniature connector parts **Specialized Strip Applications:** - High-speed stamped sealing components - Precision etched circuit elements - Multi-slide formed parts - Progressive die stamped assemblies - Fine blanked sealing surfaces --- #### **5. International Standards & Specifications** **Material Standards:** - **ASTM F15:** Standard Specification for Iron-Nickel-Cobalt Sealing Alloys - **UNS K94610:** Unified Numbering System - **MIL-DTL-23488:** Military Specification - **AMS 7723:** Aerospace Material Specification - **ISO 13123:** Thermal Expansion Characteristics - **DIN 1705:** German Industrial Standard - **JIS C2531:** Japanese Industrial Standard **Strip Specifications:** - **Dimensional Standards:** ASTM A480 compliant - **Tolerance Grades:** Precision and Ultra-Precision available - **Surface Quality:** No. 1, 2B, BA, or custom finishes - **Flatness Standards:** Standard, Precision, or Ultra-Flat - **Certification:** EN 10204 3.1/3.2 with full traceability --- #### **6. Processing & Fabrication Guidelines** **Stamping & Forming Characteristics:** - Excellent deep drawing capability in annealed condition - Superior blanking and piercing characteristics - Consistent springback control in various tempers - Minimal edge burr formation **Manufacturing Processes:** - **High-Speed Stamping:** Up to 1000 SPM capability - **Progressive Die Forming:** Complex part manufacturing - **Multi-Slide Forming:** Precision 3D components - **Fine Blanking:** Smooth, precise edges - **Photochemical Etching:** Complex geometries **Heat Treatment:** - **Continuous Annealing:** Uniform properties throughout coils - **Batch Annealing:** For specific tempers and applications - **Atmosphere Control:** Hydrogen or vacuum essential - **Temperature Uniformity:** ±5°C critical for consistency **Glass Sealing Performance:** - Perfect thermal expansion match with borosilicate glasses - Compatible with Corning 7052, 7040, and similar glasses - Excellent for high-volume automated sealing processes - Consistent performance in thermal cycling applications --- #### **Why Choose Our Alloy 27 Strip?** * **Precision Manufacturing:** Exceptional thickness control and dimensional stability * **Consistent Quality:** Uniform mechanical properties coil-to-coil * **Superior Surface Quality:** Optimized for stamping and glass sealing * **Technical Expertise:** Comprehensive support for high-volume manufacturing * **Quality Assurance:** Statistical process control with full traceability * **Global Compliance:** Meets international standards and customer specifications **Value-Added Services:** - Precision slitting to custom widths - Custom temper development - Special surface treatments - Protective packaging solutions - Just-in-time delivery programs **Contact our technical team** for specific application requirements and engineering support. We provide complete solutions for your high-volume glass-to-metal sealing strip applications, from material selection to manufacturing process optimization and quality assurance.

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 2749 gallon liquid totes Special package is available on request.