Our 4J06 Fe-Ni-Cr Alloy Wire is a top-tier solution for glass-to-metal sealing, especially in automotive applications. With a composition of 42% nickel, 6% chromium, and 52% iron, it’s engineered to match the thermal expansion of glass, ensuring airtight, durable seals. Its CTE of ~5.9 ppm/°C (20-400°C) makes it perfect for components that face extreme temperature swings. Plus, it’s got excellent corrosion resistance and mechanical strength, so it holds up in the toughest conditions. Whether you’re working on spark plugs or sensors, our 4J06 wire delivers reliability you can trust.
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The automotive industry is evolving fast, with electric vehicles (EVs) and autonomous driving pushing the need for lightweight, reliable materials. Glass-to-metal seals are critical for components like sensors and airbag igniters, where failure isn’t an option. The global market for specialty alloys is growing, with a projected CAGR of 4.8% through 2031, driven by demand for durable, high-performance materials. Miniaturization and increased thermal cycling in EVs and hybrids mean alloys like 4J06 are in high demand for their ability to maintain seal integrity. Our wire is tailored to meet these trends, supporting the shift toward smarter, greener vehicles.
| 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 4J06 Fe-Ni-Cr Alloy Wire is a workhorse in automotive applications. It’s used in spark plug seals, ensuring reliable ignition in internal combustion engines. Airbag igniters rely on it for hermetic sealing, guaranteeing safety in critical moments. You’ll also find it in automotive sensors, like oxygen or pressure sensors, where precise glass-to-metal seals are essential for performance in harsh environments. Beyond automotive, it’s a go-to for electronics and aerospace, where its thermal stability and corrosion resistance shine in components like vacuum tubes and relay seals.
Parameter | 4J06 Fe-Ni-Cr | Standard Fe-Ni (Invar) | Ni-Cr (80/20) |
|---|---|---|---|
Composition | 42% Ni, 6% Cr, 52% Fe | 36% Ni, 64% Fe | 80% Ni, 20% Cr |
CTE (ppm/°C, 20-400°C) | ~5.9 | ~1.2–1.5 | ~13.0 |
Temperature Range | -40°C to 400°C | -50°C to 230°C | Up to 1200°C |
Curie Temperature | ~370°C | ~279°C | ~600°C |
Yield Strength (MPa) | ~350 | ~260–300 | ~300 |
Tensile Strength (MPa) | ~550 | ~450–550 | ~600 |
Density (g/cm³) | 8.15 | 8.05 | 8.40 |
Applications | Glass-to-metal seals, automotive sensors | Precision instruments, thermostats | Heating elements, resistors |
Oxidation Resistance | Excellent | Moderate | Excellent |
We know the market offers plenty of alloy options, but our 4J06 Fe-Ni-Cr Alloy Wire stands out. Its Dilligent quality control ensures consistent CTE and strength, outperforming many alternatives in glass-sealing applications. We provide customized wire diameters and tempers, tailored to your exact needs, without the long lead times you’ll find elsewhere. Our advanced manufacturing skips unnecessary processing steps, reducing costs while maintaining top-notch quality. With a yield strength of ~350 MPa and tensile strength of ~550 MPa, our wire delivers durability that keeps your components reliable. Decades of expertise mean we understand the automotive industry’s demands, giving you a partner that prioritizes your success.
Why Choose Our 4J06 Fe-Ni-Cr Alloy Wire?
Our 4J06 Fe-Ni-Cr Alloy Wire is built for the future of automotive engineering. Its precise thermal expansion matching, robust mechanical properties, and corrosion resistance make it the ideal choice for glass-to-metal sealing in high-stakes applications. From EVs to autonomous vehicles, our wire ensures your components perform flawlessly. Reach out today to see how our 4J06 wire can drive your projects forward!
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 4J06 Fe-Ni-Cr Alloy Wire?
It’s a nickel-iron-chromium alloy wire designed for glass-to-metal sealing, offering excellent thermal expansion compatibility with glass and high corrosion resistance.What are the key properties of 4J06?
It has a coefficient of thermal expansion (CTE) of ~5.9 ppm/°C (20-400°C), good mechanical strength, and excellent oxidation resistance, ideal for automotive sealing applications.What industries use 4J06 Alloy Wire?
Primarily automotive, but also electronics, aerospace, and telecommunications for reliable glass-to-metal seals.What are common applications for 4J06?
It’s used in automotive sensors, spark plug seals, airbag igniters, and electronic components requiring hermetic sealing.How does 4J06 compare to other sealing alloys?
Its balanced Fe-Ni-Cr composition offers superior CTE matching with glass compared to other alloys, ensuring durable seals under thermal cycling.What temperature range is 4J06 effective in?
It performs reliably from -40°C to 400°C, maintaining seal integrity in harsh automotive environments.Is 4J06 weldable or machinable?
Yes, it’s weldable and machinable with standard techniques, though care is needed to avoid work hardening during processing.How does 4J06 align with industry trends?
It meets the automotive industry’s demand for lightweight, durable materials that support miniaturization and enhanced reliability in electric and autonomous vehicles.
