Precision 4J42 Kovar Alloy Coil, please note that the above table provides a range of standard thicknesses, widths, and lengths for Precision Alloy.
- Dimensions:
- Thickness: 0.5mm – 50mm
- Width: >600mm
- Certification: ISO, SGS, BV and so on.
- *Customized size needs to be confirmed with us
- Grades: 1J22 soft magnetic alloy, 1J50 soft magnetic alloy, 1J79 Permalloy, 1J85 Permalloy, 4J32(Super-Invar), 4J36, 4J29 Kovar alloy, 4J42Kovar alloy, Cobalt-based elastic alloy 3J21.
Precision 4J42 Kovar Alloy Size And Specifications
Precision 4J42 Kovar® alloy, also known as ASTM F15 alloy, is a controlled-expansion iron-nickel-cobalt alloy specifically engineered for applications requiring a low coefficient of thermal expansion (CTE) and high mechanical strength. This alloy is particularly suited for components that must maintain dimensional stability over a wide temperature range, especially when paired with materials like glass or ceramic. The “Kovar®” designation (a registered trademark of CRS Holdings, Inc.) signifies its compatibility with borosilicate glass, making it ideal for hermetic sealing in electronic devices, aerospace components, and precision instruments. The coil form of this alloy offers flexibility in manufacturing processes, enabling precise shaping and integration into complex assemblies. Huaxiao Metal Manufacturer is the professional and experienced in processing alloy in China.
Huaxiao Metal Supplier provides all sizes of Precision alloy coil for sale. Customized specifications are available upon request. Additionally, the exact chemical composition and mechanical properties may vary slightly within the ranges listed, depending on the specific alloy formulation and production process. Custom sizes are also available upon request. Welcome to inquire, and learn about more details about the alloy coil.
Precision 4J42 Kovar® alloy adheres to stringent industry standards, including:
- ASTM A323: For bars, rods, and shapes
- ASTM A342: For wire
- MIL-PRF-81761: For high-quality metal feedthroughs in vacuum tubes
The alloy is typically supplied in coil form, with diameters ranging from 0.08 mm to 10 mm, and can be customized to meet specific application requirements.
Chemical Composition of Precision 4J42 Kovar Alloy Coil
The precise chemical composition of Precision 4J42 Kovar® alloy is tailored to achieve its unique thermal and mechanical properties. The key elements and their typical ranges are as follows:
| Element | Content (wt.%) |
|---|---|
| Nickel (Ni) | 28.5–29.5% |
| Cobalt (Co) | 16.8–17.8% |
| Iron (Fe) | Balance |
| Manganese (Mn) | ≤0.50% |
| Silicon (Si) | ≤0.30% |
| Carbon (C) | ≤0.03% |
| Phosphorus (P) | ≤0.020% |
| Sulfur (S) | ≤0.020% |
| Copper (Cu) | ≤0.20% |
| Chromium (Cr) | ≤0.20% |
| Molybdenum (Mo) | ≤0.20% |
Physical Properties of Precision 4J42 Kovar Alloy Coil
The physical properties of Precision 4J42 Kovar® alloy are optimized for thermal stability and compatibility with other materials:
| Property | Value | Units |
|---|---|---|
| Density | 8.3 | g/cm³ |
| Melting Point | 1375–1410 | °C |
| Thermal Expansion Coefficient (CTE) | ~5.0 × 10⁻⁶ | /°C (20–300°C) |
| Thermal Conductivity | ~14 | W/m·K (at room temperature) |
| Electrical Resistivity | ~47.0 | μΩ·m (at room temperature) |
Mechanical Properties of Precision 4J42 Kovar Alloy Coil
The mechanical properties of Precision 4J42 Kovar® alloy ensure its suitability for high-stress applications:
| Property | Value | Units |
|---|---|---|
| Tensile Strength | 520 | MPa (annealed) |
| Yield Strength | 340 | MPa (annealed) |
| Elongation | 42 | % (annealed) |
| Hardness | 170–230 | HB |
Please note that the above specifications are typical and may vary slightly based on the manufacturer, production batch, and specific application requirements. For precise specifications and availability, it is recommended to consult with a supplier or manufacturer of Precision alloy coils. Huaxiao Metal Manufacturer also provides other shapes of Precision products, such as bar, sheet&plate, strip, tube&pipe, wire&mesh. The price is affordable and suitable.
What are the 4J42 Kovar Alloy Coil Benefits?
Precision 4J42 Kovar Alloy Coil, also known as Kovar alloy, is a specialized low-expansion iron-nickel-cobalt alloy designed for applications requiring extreme dimensional stability across a wide temperature range. Its unique combination of low thermal expansion, corrosion resistance, and good machinability makes it an ideal choice for various high-precision industries. These benefits make them a suitable choice for a wide range of demanding applications across different industries. Welcome to Huaxiao Metal Manufacturer to request the price, trust you can be satisfied in the alloy products and buy our products quickly, cooperate with us in trading Kovar Alloy coil 4J36 or other products.
Precision 4J42 Kovar Alloy Coil Applications and Uses
Huaxiao Metal Supplier provides all kinds of precision alloy coil in the world. Welcome to inquiry and ask for the price.
- Electronics: Hermetic seals in vacuum tubes, transistors, and sensors.
- Aerospace: Precision components in satellites, rocket engines, and thermal control systems.
- Medical Devices: Encapsulation of implantable sensors and MRI equipment components.
- Telecommunications: Microwave communication devices and base stations.
- Instrumentation: Optical instruments and precision measurement equipment.
Applications in Various Industries
| Industry | Use Case |
|---|---|
| Electronics | IC packaging, transistor casings |
| Aerospace | Sensor housings, satellite components |
| Medical Devices | MRI components, hermetic seals |
| Energy | Seals in batteries & fuel cells |
Cost-Effectiveness Analysis
While the initial cost of Kovar® alloy may be higher than alternative materials, its long-term benefits outweigh the upfront investment:
- Reduced Maintenance: Thermal stability minimizes failures in sealed components, lowering repair costs.
- Enhanced Performance: Improved reliability in critical applications (e.g., aerospace, medical devices).
- Lifecycle Cost Savings: Extended service life reduces replacement frequency and associated costs.
Manufacturing and Cost Insights
- Processing Costs: Cold drawing and annealing are cost-effective methods for coil production, while machining may incur higher expenses.
- Material Utilization: Coil form minimizes material waste compared to bar stock, reducing overall material costs.
- Scalability: Kovar® alloy production is scalable, with economies of scale reducing unit costs for large orders.
Precision 4J42 Kovar Alloy Coil Advantages
- Thermal Expansion Matching: The CTE of Kovar® alloy closely matches that of borosilicate glass and ceramics, minimizing thermal stress in sealed components.
- High Mechanical Strength: Excellent tensile and yield strengths ensure durability under mechanical loads.
- Good Formability: The alloy can be easily processed into complex shapes using techniques such as cold drawing, rolling, and welding.
- Corrosion Resistance: Resistant to oxidation and corrosion in various environments.
- Magnetic Properties: Retains magnetic properties at high temperatures, suitable for applications requiring magnetic shielding.
Tips for Procurement and Cost-Effectiveness
- Market Analysis: Monitor global metal markets for fluctuations in nickel and cobalt prices, which directly impact Kovar® alloy costs.
- Bulk Purchasing: Buying in larger quantities can reduce unit costs, especially for long-term projects.
- Supplier Partnerships: Establish long-term relationships with reputable suppliers to secure consistent quality and pricing.
- Value-Added Services: Opt for suppliers offering processing services (e.g., slitting, annealing) to reduce in-house labor costs.
Alloy Procurement Considerations
- Certifications: Ensure suppliers comply with ASTM and MIL standards for quality assurance.
- Lead Times: Plan procurement well in advance, as custom sizes and alloys may require longer lead times.
- Quality Testing: Request certificates of analysis (COAs) and perform in-house inspections for dimensional accuracy and chemical composition.
4J42 Kovar Alloy Coil Factory
Huaxiao Metal Supplier provides professional services and reasonable prices, offering customers the best quality products. The Precision Alloy Coil Alloy Factory is a specialized manufacturing facility dedicated to the production of high-quality precision alloy coils. This factory combines advanced technology, rigorous quality control, and experienced personnel to ensure the production of precision alloy coils that meet the highest standards.The factory is equipped with state-of-the-art production equipment and machinery, capable of producing precision alloy coils with precise dimensions and consistent quality. Welcome to require, and ask to the price.
Pricing Insights
- Price Trends: Historical data shows Kovar® alloy prices correlate with nickel and cobalt market trends.
- Premium Factors: Custom sizes, tight tolerances, and specialized heat treatments may incur price premiums.
- Regional Variability: Pricing may vary by region due to transportation costs, tariffs, and local supply-demand dynamics.
Comparison with Competing Alloys:
| Alloy | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|
| 4J42 | 520 | 30 |
| 4J29 | 490 | 25 |
| Stainless Steel 304 | 515 | 40 |
Analysis:
4J42 offers better tensile strength than 4J29, making it more durable in structural applications.
Lower elongation than stainless steel, but sufficient for precision sealing applications
The Precision 4J42 Kovar Alloy Coil is a nickel-iron-cobalt alloy known for its low thermal expansion properties, making it ideal for applications requiring thermal stability in high-temperature environments. This alloy is widely used in electronics, aerospace, and glass-to-metal sealing due to its ability to match the thermal expansion of borosilicate glass and certain ceramics.
Key Features:
Low coefficient of thermal expansion (CTE) (≈5.0 × 10⁻⁶/°C, 20–400°C)
Excellent hermetic sealing with glass and ceramics
High corrosion resistance and mechanical strength
Precision-manufactured for tight tolerances in coil form
In Conclusion
The Precision 4J42 Kovar Alloy Coil is a high-performance, cost-effective alternative to traditional Kovar (4J29), offering excellent thermal expansion control, mechanical strength, and corrosion resistance. Its balanced composition and competitive pricing make it ideal for electronics, aerospace, and sealing applications.
Final Recommendation:
For high-CTE matching needs, 4J42 is superior to Invar (4J36).
For cost-sensitive projects, it outperforms 4J29 Kovar.
For procurement, verify supplier certifications and request material test reports (MTRs) to ensure compliance with ASTM/GB standards.
Precision 4J42 Kovar® alloy coil is a versatile, high-performance material ideal for applications demanding thermal stability, mechanical strength, and dimensional precision. Its unique combination of properties, coupled with cost-effective procurement strategies, makes it a preferred choice across multiple industries. By leveraging its benefits and understanding market dynamics, manufacturers can optimize their use of Kovar® alloy for both technical and economic success.