Our 4J06 Fe-Ni-Cr Alloy Bar is a rock-solid choice for glass-to-metal sealing in automotive systems. With 42% nickel, 6% chromium, and 52% iron, it delivers a CTE of ~5.9 ppm/°C (20-400°C), perfectly matching glass for durable, airtight seals. It’s tough, corrosion-resistant, and built to handle the harsh conditions of automotive environments. Whether you’re working on sensors or spark plugs, our 4J06 bar ensures your components stay sealed and reliable.
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The automotive industry is speeding ahead, with a projected CAGR of 4.9% through 2032, driven by electric vehicles (EVs), autonomous driving, and advanced sensor technology. Glass-to-metal seals are critical for components like airbag igniters and engine sensors, where reliability under thermal stress is a must. As EVs and hybrids demand lightweight, durable materials, our 4J06 bar meets the challenge, offering the precision and durability needed for next-gen automotive systems.
| 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 Bar is a powerhouse in automotive applications. It’s used in spark plug seals to ensure reliable ignition in engines. Airbag igniters rely on its airtight seals for safety-critical performance. Automotive sensors, like oxygen or pressure sensors, benefit from its thermal stability in harsh conditions. Beyond automotive, it’s a great fit for electronics and aerospace, supporting hermetic seals in vacuum tubes and connectors. Wherever durable sealing is needed, our 4J06 bar delivers.
Comparison Table: 4J06 Fe-Ni-Cr vs. Kovar 4J29 vs. Alloy 42 (4J42)
|
Parameter |
4J06 Fe-Ni-Cr |
Kovar 4J29 |
Alloy 42 (4J42) |
|---|---|---|---|
|
Composition |
42% Ni, 6% Cr, 52% Fe |
29% Ni, 17% Co, 54% Fe |
42% Ni, 58% Fe |
|
CTE (ppm/°C, 20-400°C) |
~5.9 |
~5.0 |
~4.0–4.7 (20-300°C) |
|
Temperature Range |
-40°C to 400°C |
-50°C to 400°C |
-40°C to 300°C |
|
Curie Temperature |
~370°C |
~435°C |
~370°C |
|
Yield Strength (MPa) |
~350 |
~345 |
~310 |
|
Tensile Strength (MPa) |
~550 |
~520 |
~520 |
|
Density (g/cm³) |
8.15 |
8.36 |
8.12 |
|
Applications |
Automotive sensors, spark plug seals |
Vacuum tubes, microwave components |
Semiconductor lead frames, seals |
|
Oxidation Resistance |
Excellent |
Excellent |
Good |
We know the market offers plenty of alloy options, but our 4J06 Fe-Ni-Cr Alloy Bar stands out for its quality and performance. Our strict quality control ensures a consistent CTE and robust mechanical properties (yield strength ~350 MPa, tensile strength ~550 MPa). We provide customized bar sizes and forms to meet your exact specs, with faster delivery than many alternatives. Our efficient production process keeps costs low without sacrificing quality, and our alloy’s superior oxidation resistance gives it an edge in automotive applications. With years of expertise, we’re your trusted partner for high-performance alloy solutions.
Why Choose Our 4J06 Fe-Ni-Cr Alloy Bar?
Our 4J06 Fe-Ni-Cr Alloy Bar is built for durable glass sealing in automotive systems. Its precise thermal expansion, durability, and corrosion resistance make it perfect for spark plug seals, sensors, and airbag igniters. Whether you’re pushing the limits of EVs or advanced automotive systems, our bar ensures your components stay sealed and dependable. Contact us today to see how 4J06 can drive your projects forward!
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.
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FAQs
-
What is 4J06 Fe-Ni-Cr Alloy Bar?
It’s a nickel-iron-chromium alloy bar designed for durable glass-to-metal sealing, perfect for automotive systems needing airtight reliability. -
What are the key properties of 4J06?
It offers a CTE of ~5.9 ppm/°C (20-400°C), excellent corrosion resistance, and high mechanical strength, ideal for automotive sealing. -
What industries use 4J06 Alloy Bar?
Automotive, electronics, aerospace, and telecommunications rely on it for robust glass-to-metal sealing. -
What are common applications for 4J06?
It’s used in automotive sensors, spark plug seals, airbag igniters, and electronic components needing strong seals. -
How does 4J06 compare to other sealing alloys?
Its Fe-Ni-Cr composition provides a balanced CTE match with glass, ensuring better seal durability than many alternatives. -
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. -
How does 4J06 align with industry trends?
It supports the automotive industry’s push for lightweight, durable materials, driven by electric vehicles and advanced sensor technology.
