Alloy 46,Glass sealing 46 Alloy Forgings,UNS K94600,E FORU

British Specs:，American Specs: ASTM F30，German Specs:

### **Alloy 46 (Glass Sealing 46) - Forgings Product Overview** **Alloy 46** is a precision iron-nickel controlled expansion alloy specifically engineered for creating reliable hermetic seals with soft glass. The **Forgings** form provides superior mechanical properties and structural integrity for critical components requiring high reliability in demanding applications where thermal expansion matching with glass is essential. * **UNS Designation:** **K94600** * **Product Type:** Die Forgings, Open-Die Forgings, Precision Forgings --- #### **1. Chemical Composition** The chemical composition is strictly controlled to ensure consistent thermal and mechanical properties in forged components. | Element | Percentage (%) | Role in the Alloy | |:---|:---|:---| | **Nickel (Ni)** | 45.0 - 47.0 | Controls thermal expansion coefficient and Curie point | | **Iron (Fe)** | Balance | Base element providing structural matrix | | **Manganese (Mn)** | 0.10 - 0.30 | Enhances forgeability and acts as deoxidizer | | **Silicon (Si)** | 0.10 - 0.30 | Improves glass wetting characteristics | | **Carbon (C)** | 0.05 max | Limited to prevent embrittlement | | **Sulfur (S)** | 0.02 max | Controlled impurity | | **Phosphorus (P)** | 0.02 max | Controlled impurity | | **Copper (Cu)** | 0.20 max | Accidental impurity | --- #### **2. Physical Properties** Forged components maintain consistent physical properties critical for glass sealing applications. | Property | Value / Condition | Notes | |:---|:---|:---| | **Density** | 8.18 g/cm³ (0.295 lb/in³) | | | **Melting Point** | ~1427 °C (2600 °F) | | | **Curie Temperature** | ~430 °C (805 °F) | Critical for CTE matching | | **Mean Coefficient of Thermal Expansion** | 20-300°C: 9.2-9.8 μm/m·°C
20-450°C: 10.2-10.8 μm/m·°C | Matches soft glass expansion | | **Thermal Conductivity** | 14.9 W/m·K at 20°C | | | **Specific Heat** | 0.46 J/g·°C at 20°C | | | **Electrical Resistivity** | 0.49 μΩ·m at 20°C | | | **Magnetic Properties** | Ferromagnetic below Curie point | | --- #### **3. Mechanical Properties** Forgings provide enhanced mechanical properties compared to wrought forms. * **Tensile Strength:** 550-620 MPa (80-90 ksi) [Annealed] * **Yield Strength (0.2% Offset):** 300-380 MPa (44-55 ksi) [Annealed] * **Elongation:** 25-35% in 2 inches [Annealed] * **Reduction of Area:** 45-60% [Annealed] * **Impact Strength:** 40-60 J (30-45 ft-lb) [Charpy V-notch] * **Hardness:** 70-85 HRB [Annealed] * **Fatigue Strength:** 280 MPa (41 ksi) at 10⁸ cycles --- #### **4. Product Forms & Specific Applications** **Glass Sealing 46 Alloy Forgings** * **Description:** Alloy 46 forgings are produced through controlled hot forging processes at temperatures between 1100-1250°C (2010-2280°F). Available as closed-die forgings for complex shapes and open-die forgings for larger, simpler forms. Typical weights range from 0.5 kg to 50 kg, with capabilities for larger custom components. * **Primary Applications:** * **Aerospace Structural Components:** Engine mounts, structural brackets, and support frames requiring glass-sealed viewports or feedthroughs * **Power Electronics Housings:** Large enclosures for high-power RF tubes, klystron bodies, and transmitter housings * **Vacuum Chamber Flanges:** Large diameter flanges (up to 600 mm) for scientific instruments and industrial vacuum systems * **Defense System Components:** Radar transmitter housings, missile guidance system packages, and military communication equipment * **Nuclear Instrumentation:** Radiation detector housings and reactor instrumentation components * **Medical Equipment Bases:** MRI component supports, radiation therapy equipment frames * **High-Reliability Connectors:** Large multi-pin hermetic connectors for submarine and aerospace applications --- #### **5. International Standards** Alloy 46 Forgings conform to major international standards for quality and performance. | Standard Type | Standard Number | Title / Specification | |:---|:---|:---| | **ASTM** | **ASTM F15** | Standard Specification for Iron-Nickel Sealing Alloys | | **AMS** | AMS 7721 | Brazing Alloy, Iron-Nickel, 46Ni-54Fe | | **ASME** | ASME SB-166 | Nickel-Chromium-Iron Alloy Sealing Materials | | **IEC** | IEC 60404-8-6 | Metallic Magnetic Materials Specification | | **UNS** | **K94600** | Unified Numbering System Designation | | **DIN** | DIN 1745 | Metallic Materials for Glass-to-Metal Seals | | **MIL-SPEC** | MIL-DTL-23488 | Sealing Alloy Requirements | --- #### **6. Manufacturing & Quality Assurance** * **Forging Process:** Hot forging with controlled grain flow orientation * **Heat Treatment:** Solution annealing at 850-900°C followed by controlled cooling * **Machining Allowance:** Standard 3 mm per surface for finish machining * **Non-Destructive Testing:** Ultrasonic inspection per ASTM A388, dye penetrant inspection per ASTM E165 * **Metallurgical Quality:** Grain size ASTM 5-7, freedom from inclusions per ASTM E45 * **Dimensional Tolerance:** ±1.5% of nominal dimension or ±1.5 mm, whichever is greater --- **Summary** **Alloy 46 (UNS K94600) Forgings** provide the highest level of structural integrity and reliability for critical glass-to-metal sealing applications. The forging process enhances mechanical properties, improves grain structure, and ensures material soundness for components subjected to high stresses and demanding service conditions. Compliance with **ASTM F15** and other international standards guarantees consistent performance in aerospace, defense, power generation, and scientific applications where failure is not an option. The superior fatigue strength, impact resistance, and thermal stability make forged Alloy 46 components the preferred choice for the most challenging sealing 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 2491 gallon liquid totes Special package is available on request.