Our 4J33 Ni-Co alloy plate is a game-changer for high-precision glass-to-metal sealing in electronics. Crafted with a precise mix of 27% nickel, 25% cobalt, and 48% iron, this alloy—often called Ceramvar—boasts a thermal expansion coefficient that syncs perfectly with 95% Al2O3 ceramic and specific glass types. This makes it the go-to choice for creating airtight, durable seals in critical applications. Whether it’s vacuum tubes, sensors, or opto-electronic components, our 4J33 alloy delivers unmatched reliability, even in extreme conditions from -60°C to 600°C. Its excellent weldability, corrosion resistance, and machinability make it a versatile solution for industries demanding precision and longevity.
The electronics industry is booming, driven by the rise of 5G, IoT, and advanced semiconductor technologies. According to recent market trends, the demand for precision alloys like 4J33 is growing at a steady pace, with a projected CAGR of 5.8% through 2030. This growth is fueled by the need for smaller, more reliable components in consumer electronics, aerospace, and automotive sectors. Glass-to-metal sealing remains critical for hermetic packaging, ensuring devices withstand harsh environments without compromising performance. As industries push for miniaturization and sustainability, alloys like 4J33 are in high demand for their ability to maintain structural integrity under thermal stress and corrosive 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 |
For more details, pls directly contact us.
Our 4J33 alloy plate shines in a wide range of applications:
Electronics: Used in vacuum tubes, transistors, and integrated circuit packages for reliable hermetic sealing.
Aerospace: Ensures precision in sensors and instrumentation exposed to extreme temperatures.
Automotive: Powers airbag spark applications and battery connections with durable seals.
Opto-electronics: Supports high-vacuum systems, laser equipment, and X-ray tubes.
Telecommunications: Enhances performance in microwave windows and precision instruments.
Its ability to match the thermal expansion of ceramics and glass makes it ideal for any application requiring a robust, leak-proof seal.
Comparison Table: 4J33 Ni-Co Alloy Plate vs. Other Sealing Alloys
Parameter | 4J33 Ni-Co Alloy Plate | Other Sealing Alloys |
|---|---|---|
Thermal Expansion (CTE) | Matches 95% Al2O3 ceramic (~5 × 10⁻⁶ /K) | Varies, often less precise match |
Temperature Range | -60°C to 600°C | Typically narrower, up to 300–500°C |
Corrosion Resistance | Excellent, resists harsh environments | Moderate, depends on alloy composition |
Weldability | High, supports reliable brazing | Varies, some alloys less weldable |
Machinability | Superior, allows precise fabrication | Moderate, may require specialized tools |
Applications | Electronics, aerospace, opto-electronics | Limited to specific uses, less versatile |
Durability | Long-lasting, resists thermal stress | Varies, may degrade under extreme conditions |
Customization | Highly customizable (size, form, thickness) | Limited customization options |
Compared to other suppliers, our 4J33 alloy plate stands out for several reasons:
Precision Manufacturing: We adhere to strict ASTM F1466 standards, ensuring consistent chemical composition, tensile strength, and thermal expansion properties.
Customization: We offer tailored sizes, thicknesses (0.4–8mm), and forms (plate, sheet, strip) to fit your exact needs.
Superior Quality: Our alloy undergoes rigorous testing for surface finish, grain size, and inclusion content, guaranteeing top performance.
Fast Delivery: With flexible MOQs starting at 100kg and stock availability, we can deliver small or large orders quickly.
Expert Support: Our in-house R&D team provides technical guidance to optimize your application.
Unlike other options, our 4J33 alloy combines exceptional durability with cost-effective production, making it a smart choice for high-stakes projects.
Conclusion
Our 4J33 Ni-Co alloy plate is the ultimate solution for high-precision glass-to-metal sealing in electronics. Its unique thermal expansion properties, robust performance, and versatility make it a trusted choice across industries. As the demand for reliable, compact, and durable components grows, our 4J33 alloy is ready to meet the challenge, backed by our commitment to quality, customization, and fast delivery. Choose our 4J33 alloy plate for your next project and experience the difference in precision and reliability.
Keywords: 4J33 Ni-Co alloy plate, glass-to-metal sealing, precision alloy, electronics, hermetic sealing, thermal expansion, aerospace, automotive, opto-electronics, Ceramvar alloy
For more details, pls directly contact us.
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.
Client Visits
Building Stronger Partnerships
We support all kinds of testing:
FAQs
What is 4J33 Ni-Co alloy plate used for?
It’s primarily used for high-precision glass-to-metal sealing in electronics, ensuring hermetic seals in devices like vacuum tubes, sensors, and opto-electronics.What makes 4J33 alloy ideal for glass-to-metal sealing?
Its thermal expansion coefficient closely matches that of 95% Al2O3 ceramic and certain glasses, preventing cracks during temperature changes.What industries rely on 4J33 alloy plates?
Electronics, aerospace, telecommunications, automotive, and precision engineering industries use it for reliable sealing and durability.How does 4J33 perform under extreme temperatures?
It maintains stability and integrity from -60°C to 600°C, making it suitable for demanding environments.What are the key properties of 4J33 alloy?
It offers low thermal expansion, excellent weldability, corrosion resistance, and machinability for precision applications.Can 4J33 alloy be customized for specific applications?
Yes, it can be tailored in thickness, width, and form (plate, sheet, or strip) to meet project-specific needs.What manufacturing standards does 4J33 meet?
It complies with ASTM F1466 and other industry standards for chemical composition, tensile strength, and thermal expansion.How does 4J33 contribute to product longevity?
Its robust sealing properties and resistance to thermal stress ensure long-lasting performance in electronic components.
