Our 4J44 Precision Alloy Bar is a game-changer for sensor production in high-temperature environments. With 40% nickel, 14% cobalt, and 46% iron, it boasts a low CTE of ~5.0 ppm/°C (20-500°C), keeping components stable under heat. It’s tough, corrosion-resistant, and easy to work with, making it ideal for precision sensors. Whether you’re building for aerospace or automotive systems, our 4J44 bar delivers the reliability you need to keep things running smoothly.
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The sensor market is booming, with a projected CAGR of 6.3% through 2032, driven by advancements in aerospace, automotive, and industrial automation. High-temperature sensors are critical for smart systems, from IoT devices to electric vehicles and aerospace controls. Materials that maintain performance under extreme heat are in high demand, especially for engine monitoring and satellite sensors. Our 4J44 bar is tailored to these trends, offering unmatched thermal stability and durability for next-gen sensor technology.
| 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 4J44 Precision Alloy Bar is a go-to for high-temperature sensor applications. In aerospace, it’s used in control systems and environmental sensors, where precision is critical under extreme conditions. Automotive applications include engine temperature sensors and pressure transducers, ensuring reliable performance in hot, harsh environments. Industrial automation relies on 4J44 for sensors in high-heat manufacturing processes, while electronics use it in precision components like Thermocouple s. Wherever temperature stability is key, our 4J44 bar shines.
Comparison Table: 4J44 Precision Alloy vs. 4J43 Fe-Ni-Co vs. Kovar 4J29
|
Parameter |
4J44 Precision Alloy |
4J43 Fe-Ni-Co |
Kovar 4J29 |
|---|---|---|---|
|
Composition |
40% Ni, 14% Co, 46% Fe |
42% Ni, 15% Co, 43% Fe |
29% Ni, 17% Co, 54% Fe |
|
CTE (ppm/°C, 20-500°C) |
~5.0 |
~5.2 |
~5.0 |
|
Temperature Range |
-50°C to 500°C |
-50°C to 500°C |
-50°C to 400°C |
|
Curie Temperature |
~415°C |
~420°C |
~435°C |
|
Yield Strength (MPa) |
~355 |
~360 |
~345 |
|
Tensile Strength (MPa) |
~550 |
~560 |
~520 |
|
Density (g/cm³) |
8.22 |
8.25 |
8.36 |
|
Applications |
Sensors, pressure transducers |
Aerospace sensors, satellite parts |
Vacuum tubes, microwave components |
|
Oxidation Resistance |
Excellent |
Excellent |
Excellent |
We know there are plenty of alloy options out there, but our 4J44 Precision Alloy Bar stands out for its quality and performance. Our strict quality control guarantees a consistent CTE and robust mechanical properties (yield strength ~355 MPa, tensile strength ~550 MPa). We offer customized bar sizes and forms to fit your exact specs, with faster delivery times than many alternatives. Our efficient production process keeps costs low without skimping on quality, and our alloy’s high-temperature stability gives it an edge in sensor applications. With years of expertise, we’re the partner you can trust for precision alloy solutions.
Why Choose Our 4J44 Precision Alloy Bar?
Our 4J44 Precision Alloy Bar is built for the toughest sensor production challenges. Its low thermal expansion, durability, and corrosion resistance make it perfect for aerospace, automotive, and industrial systems. Whether you’re tackling high-heat environments or pushing for smarter automation, our bar ensures your sensors perform flawlessly. Contact us today to see how 4J44 can power your next project!
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 4J44 Precision Alloy Bar?
It’s a nickel-iron-cobalt alloy bar designed for high-temperature stability, perfect for sensor production requiring reliable performance. -
What are the key properties of 4J44?
It offers a CTE of ~5.0 ppm/°C (20-500°C), excellent corrosion resistance, and high mechanical strength, ideal for precision sensors. -
What industries use 4J44 Alloy Bar?
Aerospace, automotive, industrial automation, and electronics rely on it for thermally stable sensor components. -
What are common applications for 4J44?
It’s used in temperature sensors, pressure transducers, aerospace control systems, and automotive engine monitoring components. -
How does 4J44 compare to other precision alloys?
Its optimized Ni-Co-Fe composition provides better thermal stability and strength at high temperatures than many similar alloys. -
What temperature range is 4J44 effective in?
It performs reliably from -50°C to 500°C, ensuring stability in high-temperature sensor environments. -
Is 4J44 weldable or machinable?
Yes, it’s weldable and machinable with standard techniques, though careful handling is needed to avoid work hardening. -
How does 4J44 align with industry trends?
It supports the demand for high-reliability materials in sensors for aerospace, automotive, and IoT-driven automation.
