Our 4J49 Fe-Ni-Cr alloy plate is a powerhouse for high-performance sealing in electronic devices. With a precise blend of iron, nickel, and chromium, this alloy offers a thermal expansion coefficient that syncs perfectly with specific glasses and ceramics, making it ideal for creating airtight seals in sensors, vacuum tubes, and other critical components. Stable from -60°C to 500°C, our 4J49 alloy delivers excellent corrosion resistance, weldability, and machinability, ensuring top-notch performance in demanding electronic applications.
The electronics industry is on a roll, with a projected CAGR of 6.7% for precision alloys like 4J49 through 2030. The surge in 5G, IoT, and electric vehicle technologies is driving demand for materials that can handle thermal stress while maintaining reliable seals. High-performance sealing is critical for compact, durable components in everything from consumer electronics to aerospace systems. As industries push for smaller, more efficient designs, our 4J49 alloy stands out for its ability to deliver consistent performance in harsh conditions.
| Elements | 4J29 | 4J36 | |
| Carbon (C) | Not greater than | 0.03 | 0.05 |
| Sulfur (S) | 0.02 | 0.02 | |
| Phosphorus (P) | 0.02 | 0.02 | |
| Manganese (Mn) | ≤0.50 | 0.20-0.60 | |
| Silicon (Si) | ≤0.30 | ≤0.30 | |
| Nickel (Ni) | 28.5-29.5 | 35.0-37.0 | |
| Chromium (Cr) | - | - | |
| Cobalt (Co) | 16.8-17.8 | - | |
| Iron (Fe) | Rest | Rest | |
| Other Elements |
| Alloy Grade | 20°C-100°C | 20°C-300°C | 20°C-500°C |
| 4J36 Invar Alloy | 1.2×10⁻⁶ /°C | 2.5×10⁻⁶ /°C | - |
| 4J29 Kovar Alloy | 4.6×10⁻⁶ /°C | 5.5×10⁻⁶ /°C | 6.2×10⁻⁶ /°C |
| Alloy Grade | 4J36 Invar Alloy | 4J29 Kovar Alloy |
| Density (g/cm³) | 8.1 | 8.2 |
| Tensile Strength (MPa) | 500-600 | 600-700 |
| Yield Strength (MPa) | 250-350 | 300-400 |
| Hardness (HV) | 150-200 | 200-250 |
| Alloy Grade | 4J36 Invar Alloy | 4J29 Kovar Alloy |
| Electrical Resistivity (10⁻⁶ Ω·cm) | 80 | 50 |
| Thermal Conductivity (W/m·K) | 10-12 | 16-18 |
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Our 4J49 alloy plate is a versatile solution for a range of high-precision applications:
Electronics: Ensures hermetic seals in sensors, connectors, and microelectronic packages.
Aerospace: Supports reliable sealing in avionics and satellite components under extreme conditions.
Automotive: Powers durable seals in EV battery sensors and ADAS systems.
Telecommunications: Enhances performance in microwave tubes and optical systems.
Medical Devices: Used in diagnostic equipment and implants requiring airtight seals.
Its low thermal expansion and robust properties make it perfect for applications where precision and durability are critical.
Comparison Table: 4J49 Fe-Ni-Cr Alloy Plate vs. Other Sealing Alloys
Parameter | 4J49 Fe-Ni-Cr Alloy Plate | Other Sealing Alloys |
|---|---|---|
Thermal Expansion (CTE) | Matches glasses/ceramics (~5.0 × 10⁻⁶ /K) | Varies, often less compatible |
Temperature Range | -60°C to 500°C | Typically limited to 200–450°C |
Corrosion Resistance | Excellent, resists harsh environments | Moderate, depends on alloy composition |
Weldability | High, supports strong hermetic seals | Inconsistent, some alloys less reliable |
Machinability | Superior, enables precision fabrication | Moderate, may need specialized tools |
Applications | Electronics, aerospace, medical devices | Limited to less demanding uses |
Durability | Exceptional, resists thermal fatigue | Varies, may degrade under extremes |
Customization | Highly customizable (size, form, thickness) | Limited flexibility in customization |
Our 4J49 alloy plate sets the standard for quality and performance:
Precision Manufacturing: We meet ASTM F1466 standards, ensuring consistent composition, strength, and thermal properties.
Custom Solutions: Available in tailored sizes, thicknesses (0.3–10mm), and forms to fit your exact specifications.
Superior Quality: Rigorous testing for surface finish, grain size, and inclusions guarantees flawless performance.
Fast Delivery: Flexible MOQs starting at 100kg and in-stock options for quick turnaround.
Expert Support: Our R&D team provides technical guidance to optimize your sealing applications.
Compared to other options, our 4J49 alloy offers unmatched reliability, customization, and cost-effectiveness, making it the go-to choice for high-performance electronic sealing.
Conclusion
Our 4J49 Fe-Ni-Cr alloy plate is the ultimate solution for high-performance sealing in electronic devices. Its precise thermal expansion, durability, and versatility make it a trusted material across electronics, aerospace, and automotive industries. As the demand for reliable, compact components grows, our 4J49 alloy delivers, backed by our commitment to quality, customization, and rapid delivery. Choose our 4J49 alloy plate to power your next project with unmatched precision and performance.
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About Us:
Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications. For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.
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FAQs
What is 4J49 Fe-Ni-Cr alloy plate used for?
It’s used for high-performance sealing in electronic devices, ensuring airtight seals in components like sensors and vacuum tubes.Why is 4J49 ideal for electronic sealing?
Its thermal expansion coefficient matches specific glasses and ceramics, preventing cracks during thermal cycling.Which industries use 4J49 alloy plates?
Electronics, aerospace, telecommunications, automotive, and medical industries rely on it for precision and reliability.How does 4J49 perform in extreme conditions?
It stays stable from -60°C to 500°C, perfect for demanding electronic environments.What are the key properties of 4J49 alloy?
Low thermal expansion, excellent corrosion resistance, high weldability, and machinability for precision sealing.Can 4J49 be customized for specific projects?
Yes, we offer custom thicknesses, widths, and forms (plate, sheet, strip) to meet your project needs.What standards does 4J49 meet?
It complies with ASTM F1466 and other industry standards for composition, strength, and thermal properties.How does 4J49 enhance device reliability?
Its robust sealing and thermal stability ensure long-lasting performance in electronic components.
