Alloy 27，Glass sealing 27 Alloy Forgings，,E FORU

British Specs:，American Specs:，German Specs:

### **Product Introduction: Alloy 27 / Glass Sealing 27 Alloy Forgings** **Premium Forged Components for Critical Glass-to-Metal Sealing Applications** **Alloy 27 Forgings** represent the highest quality manufacturing solution for critical glass-to-metal sealing components requiring superior structural integrity and reliability. Through the controlled forging process, this cobalt-nickel-iron alloy develops enhanced mechanical properties, refined grain structure, and optimal directional strength, making it the preferred choice for high-stress applications in aerospace, defense, and precision instrumentation where component failure is not an option. --- #### **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 Control:** The exact 27% **Cobalt** and 27% **Nickel** balance is meticulously maintained throughout the forging process to ensure consistent thermal expansion matching with borosilicate glasses, while the forging process enhances material purity and structural homogeneity. --- #### **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) | | **Forging Temperature Range** | 1150-1250°C (2100-2280°F) | --- #### **3. Mechanical Properties** | Property | Forged & Annealed | Forged & Heat Treated | | :--- | :--- | :--- | | **Tensile Strength** | 80-100 ksi (552-690 MPa) | 95-115 ksi (655-793 MPa) | | **Yield Strength (0.2% Offset)** | 50-70 ksi (345-483 MPa) | 75-95 ksi (517-655 MPa) | | **Elongation** | 30-40% | 20-30% | | **Reduction of Area** | 50-65% | 40-55% | | **Hardness** | Rb 80-90 | Rb 90-100 | | **Impact Toughness** | 45-65 ft-lb (61-88 J) | 35-55 ft-lb (47-75 J) | --- #### **4. Product Specifications & Applications** **Forging Capabilities:** - **Open Die Forgings:** 1 kg to 500 kg components - **Closed Die Forgings:** Complex geometries and near-net shapes - **Ring Rolled Forgings:** 100 mm to 1500 mm diameters - **Forging Types:** Hammer, press, and upset forgings **Primary Applications:** * **Aerospace & Defense:** - Missile guidance system housings - Radar transmitter components - Satellite communication housings - Avionics enclosure forgings * **Power Generation:** - Nuclear instrument housings - Power semiconductor bases - High-voltage feedthrough forgings - Turbine sensor components * **Medical Technology:** - Radiation therapy equipment - Medical imaging system components - Surgical laser housings - Implantable device encapsulation * **Industrial Equipment:** - High-pressure vessel penetrations - Process control instrument bodies - Analytical equipment housings - Vacuum system components **Forging Advantages:** - Superior grain flow following component contours - Elimination of internal voids and porosity - Enhanced mechanical properties in critical directions - Improved fatigue and stress rupture life --- #### **5. International Standards & Specifications** **Material Standards:** - **ASTM F15:** Standard Specification for Iron-Nickel-Cobalt Sealing Alloys - **ASTM B564:** Standard Specification for Nickel Alloy Forgings - **UNS K94610:** Unified Numbering System - **MIL-DTL-23488:** Military Specification - **AMS 7723:** Aerospace Material Specification - **ISO 13123:** Thermal Expansion Testing - **DIN 1705:** German Industrial Standard **Forging Quality Standards:** - **Dimensional Inspection:** Per customer drawings and specifications - **Non-Destructive Testing:** UT, RT, MT, PT as required - **Metallurgical Testing:** Grain flow verification - **Certification Level:** Grade B, Class 1, 2, 3 available --- #### **6. Processing & Quality Assurance** **Forging Process:** - **Billet Conditioning:** Ultrasonic testing of starting material - **Hot Working:** Controlled temperature and deformation - **Heat Treatment:** Full solution annealing and aging - **Quality Verification:** Multiple inspection stages **Quality Assurance Protocols:** - **Chemical Analysis:** Ladle and check analysis - **Mechanical Testing:** Tensile, impact, hardness - **Macroetch Testing:** Grain flow verification - **Non-Destructive Examination:** Per required specifications - **Dimensional Verification:** First article and in-process inspection **Heat Treatment:** - **Forging Preheat:** 1150-1200°C (2100-2190°F) - **Solution Annealing:** 850-950°C (1560-1740°F) - **Stress Relieving:** 425-540°C (800-1000°F) - **Atmosphere Control:** Hydrogen or vacuum protection **Glass Sealing Performance:** - Maintains perfect thermal expansion match with borosilicate glasses - Compatible with Corning 7052, 7040, and similar glass types - Superior performance in high-stress sealing applications - Excellent thermal cycling resistance in forged condition --- #### **Why Choose Our Alloy 27 Forgings?** * **Premium Quality:** Strict control of forging parameters and heat treatment * **Enhanced Properties:** Superior mechanical characteristics through grain refinement * **Proven Reliability:** Extensive experience in critical application forgings * **Technical Expertise:** Comprehensive engineering support * **Quality Assurance:** Multiple NDT methods and full documentation * **Global Compliance:** Meets international standards and customer specifications **Value-Added Services:** - Custom forging design consultation - Complete machining capabilities - Heat treatment processing - Non-destructive testing services - Comprehensive certification packages **Contact our forging specialists** for technical consultation and quotation. We provide complete solutions for your critical glass-to-metal sealing forging requirements, from initial design through final certification, ensuring the highest levels of quality and performance for your most demanding 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 2751 gallon liquid totes Special package is available on request.