Our 4J33 Ni-Co Alloy Wire is a premium choice for high-precision glass-to-metal sealing in electronics. Made with 35% nickel, 17% cobalt, and 48% iron, it’s designed to match the thermal expansion of specific glasses, with a CTE of ~4.7 ppm/°C (20-450°C). This ensures rock-solid seals that hold up under thermal stress. It’s tough, corrosion-resistant, and easy to work with, making it perfect for intricate electronic components where reliability is everything.
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The electronics industry is booming, with 5G, IoT, and wearable devices driving demand for smaller, more reliable components. Glass-to-metal seals are critical for hermetic packaging in semiconductors, sensors, and microwave systems. The global market for specialty alloys is expected to grow at a CAGR of 5.2% through 2030, fueled by advancements in telecommunications and medical electronics. As devices shrink and performance expectations rise, materials like our 4J33 wire are in high demand for their precision and durability. We’re ready to meet these challenges with a product tailored for next-gen electronics.
| 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 4J33 Ni-Co Alloy Wire is a star performer in electronics. It’s used in vacuum tubes and semiconductor packaging, where airtight seals protect sensitive components. You’ll find it in microwave components like waveguides and filters, ensuring stable performance in telecommunications. Medical devices, such as implantable sensors, rely on 4J33 for biocompatible, durable seals. It’s also a go-to for aerospace electronics, where its thermal stability shines in high-altitude or space environments. Wherever precision sealing is needed, our 4J33 wire delivers.
Parameter | 4J33 Ni-Co | 4J06 Fe-Ni-Cr | Standard Fe-Ni (Invar) |
|---|---|---|---|
Composition | 35% Ni, 17% Co, 48% Fe | 42% Ni, 6% Cr, 52% Fe | 36% Ni, 64% Fe |
CTE (ppm/°C, 20-450°C) | ~4.7 | ~5.9 | ~1.2–1.5 |
Temperature Range | -40°C to 450°C | -40°C to 400°C | -50°C to 230°C |
Curie Temperature | ~430°C | ~370°C | ~279°C |
Yield Strength (MPa) | ~340 | ~350 | ~260–300 |
Tensile Strength (MPa) | ~520 | ~550 | ~450–550 |
Density (g/cm³) | 8.27 | 8.15 | 8.05 |
Applications | Semiconductor packaging, vacuum tubes | Automotive sensors, spark plug seals | Precision instruments, thermostats |
Oxidation Resistance | Excellent | Excellent | Moderate |
Plenty of companies offer sealing alloys, but our 4J33 Ni-Co Alloy Wire sets the bar high. We prioritize precision, with strict quality controls ensuring a consistent CTE and robust mechanical properties (yield strength ~340 MPa, tensile strength ~520 MPa). Unlike others, we offer customized wire sizes and finishes, tailored to your specs, with fast turnaround times. Our streamlined production cuts costs without sacrificing quality, and our alloy’s excellent CTE match with glass outperforms many alternatives. With years of expertise in specialty alloys, we’re your go-to partner for reliable, high-performance solutions in electronics.
Why Choose Our 4J33 Ni-Co Alloy Wire?
Our 4J33 Ni-Co Alloy Wire is built for the demands of modern electronics. Its precise thermal expansion, durability, and corrosion resistance make it ideal for high-stakes applications like semiconductor packaging and medical sensors. Whether you’re pushing the boundaries of 5G or building life-saving devices, our wire ensures your components stay sealed and reliable. Contact us today to see how 4J33 can power your next project!
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 4J33 Ni-Co Alloy Wire?
It’s a nickel-cobalt-iron alloy wire optimized for glass-to-metal sealing, offering a low coefficient of thermal expansion and excellent compatibility with electronic components.What are the key properties of 4J33?
It has a CTE of ~4.7 ppm/°C (20-450°C), high corrosion resistance, and good mechanical strength, ideal for precision electronics.What industries use 4J33 Alloy Wire?
Electronics, telecommunications, aerospace, and medical device industries rely on it for hermetic sealing applications.What are common applications for 4J33?
It’s used in vacuum tubes, semiconductor packaging, microwave components, and medical sensors requiring reliable glass seals.How does 4J33 differ from other sealing alloys?
Its nickel-cobalt composition provides a closer CTE match to specific glasses, offering superior seal integrity compared to standard Fe-Ni alloys.What temperature range is 4J33 effective in?
It maintains performance from -40°C to 450°C, ensuring stability in high-temperature electronic environments.Is 4J33 weldable or machinable?
Yes, it’s weldable and machinable with standard methods, though precise control is needed to avoid work hardening.How does 4J33 align with industry trends?
It supports the growing need for miniaturized, high-reliability components in electronics, driven by advancements in 5G, IoT, and medical technology.
