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

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

### **Alloy 46 (Glass Sealing 46) - Strip Product Overview** **Alloy 46** is a precision iron-nickel controlled expansion alloy specifically formulated for creating reliable hermetic seals with soft glass. The **Strip** form of this material provides a thin, narrow, and dimensionally precise product ideal for high-volume manufacturing of electronic components where consistent thermal expansion matching with glass is critical. * **UNS Designation:** **K94600** * **Common Product Forms:** Strip, Foil, Tape, Precision Rolled Sheet --- #### **1. Chemical Composition** The chemical composition is meticulously controlled to ensure batch-to-batch consistency in thermal expansion properties. | Element | Percentage (%) | Role in the Alloy | |:---|:---|:---| | **Nickel (Ni)** | 45.0 - 47.0 | Determines thermal expansion coefficient and Curie temperature | | **Iron (Fe)** | Balance | Forms the base matrix | | **Manganese (Mn)** | 0.10 - 0.30 | Enhances hot workability and acts as deoxidizer | | **Silicon (Si)** | 0.10 - 0.30 | Improves glass wetting and scale resistance | | **Carbon (C)** | 0.05 max | Minimized to prevent carbide formation | | **Sulfur (S)** | 0.02 max | Controlled impurity | | **Phosphorus (P)** | 0.02 max | Controlled impurity | | **Aluminum (Al)** | 0.10 max | Accidental impurity | --- #### **2. Physical Properties** The physical properties feature a precise thermal expansion profile engineered to match soft glass. | 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 behavior | | **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 Corning 0080, 0120, and similar soft glasses | | **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** Strip is available in various tempers to suit different manufacturing requirements. | Property | Annealed | ¼ Hard | ½ Hard | Full Hard | |:---|:---|:---|:---|:---| | **Tensile Strength (MPa)** | 510-580 | 620-720 | 720-850 | 850-1000 | | **Yield Strength (MPa)** | 270-340 | 550-650 | 650-780 | 780-950 | | **Elongation (%)** | 30-40 | 12-20 | 8-15 | 3-8 | | **Hardness (HV)** | 130-160 | 180-220 | 220-260 | 260-320 | --- #### **4. Product Forms & Specific Applications** **Glass Sealing 46 Alloy Strip** * **Description:** Alloy 46 strip is typically supplied in thicknesses from 0.05 mm (0.002 in) to 2.0 mm (0.079 in), with widths up to 300 mm (12 in). The material is characterized by exceptional dimensional consistency, tight thickness tolerances (typically ±5%), and superior surface finish quality. Available in various edge conditions (slit, sheared, or rolled edges) and surface finishes (matte, bright, or plated). * **Primary Applications:** * **Lead Frame Components:** Precision-stamped lead frames for semiconductor packages and microelectronic assemblies. * **Sealing Ribbons:** Narrow strips used as sealing elements in vacuum tubes and display devices. * **Electronic Package Lids:** Thin, precision lids for hermetic packages in military and aerospace electronics. * **Photomask Frames:** Dimensionally stable frames for semiconductor photomasks. * **Battery Sealing Components:** Critical sealing elements in lithium batteries and other energy storage devices. * **Sensor Elements:** Base material for various sensor components requiring glass insulation. * **Microwave Package Components:** Precise components for RF and microwave packaging. * **Hybrid Circuit Substrates:** Base material for thick-film hybrid circuits. --- #### **5. International Standards** Alloy 46 Strip complies with rigorous international standards for sealing alloys. | Standard Type | Standard Number | Title / Specification | |:---|:---|:---| | **ASTM** | **ASTM F15** | Standard Specification for Iron-Nickel Sealing Alloys | | **ASTM** | ASTM F30 | Specification for Iron-Nickel Alloys in Preoxidized Condition | | **AMS** | AMS 7721 | Brazing Alloy, Iron-Nickel, 46Ni-54Fe | | **IEC** | IEC 60404-8-6 | Metallic Magnetic Materials - Soft Magnetic Metallic Materials | | **UNS** | **K94600** | Unified Numbering System Designation | | **JIS** | H 7541 | Alloys for Glass-to-Metal Seals | | **DIN** | DIN 1745 | Metallic Materials for Glass-to-Metal Seals | --- #### **6. Manufacturing & Processing Characteristics** * **Stamping & Blanking:** Excellent for high-speed progressive die operations with proper tooling clearance (6-8% of material thickness) * **Surface Treatments:** Typically supplied with copper plating (0.5-2.0 μm) or nickel plating for enhanced glass sealing performance * **Heat Treatment:** Continuous annealing capabilities; stress relief at 750-800°C recommended between severe forming operations * **Slitting & Shearing:** Can be precision slit to tight width tolerances (±0.05 mm) with minimal edge burr * **Glass Sealing Performance:** Optimal sealing achieved with controlled oxidation and heating rates of 5-10°C/minute through critical temperature ranges --- **Summary** **Alloy 46 (UNS K94600) Strip** represents the highest precision form of this matched sealing alloy, offering exceptional dimensional control and consistent performance for mass-produced electronic components. Its precisely engineered thermal expansion properties, combined with excellent formability and surface characteristics, make it indispensable for modern electronics manufacturing. Compliance with **ASTM F15** and other international standards ensures the material quality and performance consistency required for automated high-volume production of reliable glass-to-metal seals in critical electronic 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 2489 gallon liquid totes Special package is available on request.