Nickel Iron Alloy 52 Sealing Wire, UNS N14052,W.NR 2.4478; AWS 093,E FORU

**Product Overview: Nickel Iron Alloy 52 Sealing Wire (UNS N14052, W.NR 2.4478, AWS 093)** Nickel Iron Alloy 52 Sealing Wire is a specialized sealing alloy with a nominal composition of 52% nickel and 48% iron, designed specifically for matched sealing applications with certain glass and ceramic materials. Known under designations UNS N14052, W.NR 2.4478, and AWS 093, this alloy features a thermal expansion characteristic that closely matches specific glass types, ensuring reliable hermetic seals in electronic and semiconductor applications. --- ### **Key Characteristics & Advantages** - **Matched Thermal Expansion**: Coefficient of thermal expansion (CTE) tailored for specific glass and ceramic sealing - **Excellent Hermeticity**: Provides reliable gas-tight seals in critical applications - **Good Corrosion Resistance**: Withstands various environmental conditions - **High Strength and Ductility**: Allows for easy fabrication and forming - **Consistent Performance**: Reliable sealing characteristics batch-to-batch --- ### **Chemical Composition (Typical Weight %)** | Element | Content Range (%) | Function Description | |------------------|-------------------|-----------------------| | **Nickel (Ni)** | 51.0–52.5 | Primary element controlling thermal expansion | | **Iron (Fe)** | Balance | Base element providing structural integrity | | **Manganese (Mn)**| 0.2–0.6 | Controls sulfur and improves workability | | **Silicon (Si)** | 0.1–0.3 | Enhances oxidation resistance | | **Carbon (C)** | ≤0.03 | Minimized to prevent carbide formation | | **Cobalt (Co)** | ≤0.5 | Controlled impurity | | **Other Elements**| ≤0.2 | Controlled impurities | --- ### **Physical Properties** | Property | Typical Value | Test Conditions | |---------------------------------|------------------------|--------------------------| | **Density** | 8.25 g/cm³ | At room temperature | | **Melting Point** | 1420–1450°C | Liquidus temperature | | **Thermal Expansion Coefficient**| 9.5–10.5 × 10⁻⁶/°C | 25–500°C range | | **Thermal Conductivity** | 18.5 W/m·K | At 20°C | | **Electrical Resistivity** | 0.44 μΩ·m | At 20°C | | **Curie Temperature** | 450–470°C | Magnetic transition point | --- ### **Mechanical Properties** | Property | Typical Value | Test Conditions | |------------------------|----------------------|----------------------------| | **Tensile Strength** | 520–620 MPa | Annealed condition | | **Yield Strength** | 220–280 MPa | At 0.2% offset | | **Elongation** | 25–35% | In 50 mm | | **Hardness** | 140–180 HV | Annealed condition | | **Modulus of Elasticity** | 155 GPa | At room temperature | --- ### **International Standards & Specifications** Alloy 52 Sealing Wire complies with the following international standards: - **ASTM F30**: Standard for Iron-Nickel Sealing Alloys - **UNS N14052**: Unified Numbering System designation - **W.NR 2.4478**: German Material Number - **AWS 093**: American Welding Society classification - **ISO 6207**: International specification for sealing alloys - **MIL-P-47173**: Military specification for electronic sealing applications --- ### **Applications** 1. **Electronics and Semiconductors**: - Glass-to-metal seals in connectors and headers - Ceramic package sealing - Sensor encapsulation - Microelectronic packaging 2. **Aerospace and Defense**: - Hermetic connectors and feedthroughs - Avionics packaging - Military communications equipment - Satellite components 3. **Medical Devices**: - Implantable medical electronics - Diagnostic equipment seals - Surgical instrument components 4. **Industrial Applications**: - High-reliability electrical components - Power semiconductor devices - Oil and gas instrumentation --- ### **Available Forms & Specifications** - **Wire Diameters**: 0.1 mm to 3.0 mm - **Surface Finish**: Bright annealed or cleaned - **Tolerances**: Standard ±1% or special tolerances available - **Spool Sizes**: 1 kg to 25 kg standard spools - **Special Packaging**: Vacuum sealed for critical applications --- ### **Sealing Compatibility** - **Glass Types**: Compatible with specific borosilicate and aluminosilicate glasses - **Ceramic Materials**: Matched with certain alumina and ceramic formulations - **Sealing Methods**: Suitable for ribbon sealing, butt sealing, and graded seals --- **Disclaimer**: *The information provided is for technical reference only. Actual sealing performance depends on specific glass/ceramic composition, sealing parameters, and surface preparation. Users should conduct compatibility testing and process validation for their specific applications. Always follow manufacturer's recommendations and industry best practices for hermetic sealing processes.*

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 3103 gallon liquid totes Special package is available on request.