Our 4J52 Fe-Ni Alloy Bar is a top choice for high-accuracy optical and laser device applications. With 52% nickel and 48% iron, it delivers a low CTE of ~4.9 ppm/°C (20-400°C), ensuring your components stay stable through temperature changes. It’s tough, corrosion-resistant, and easy to machine, making it perfect for precision parts. Whether you’re building laser systems or telescope mounts, our 4J52 bar offers the reliability and accuracy you need.
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The optical and laser device market is booming, with a projected CAGR of 6.2% through 2032, driven by advancements in aerospace, medical technology, and industrial automation. As optical systems get more complex, materials with low thermal expansion are critical for maintaining precision. Aerospace relies on stable alloys for satellite optics, while medical and industrial sectors need them for laser systems and sensors. The push for miniaturization and high-accuracy devices makes our 4J52 bar a perfect fit for these cutting-edge trends.
| 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 4J52 Fe-Ni Alloy Bar is a star performer in optical and laser applications. It’s used in optical mounts for telescopes and microscopes, keeping alignment precise despite temperature shifts. Laser systems, like those in medical devices or industrial cutting, rely on its stability for consistent performance. Precision sensors in aerospace and scientific instruments benefit from its low CTE, ensuring accurate measurements. You’ll also find it in high-end laser optics and interferometers, where dimensional stability is critical.
Comparison Table: 4J52 Fe-Ni vs. 4J50 Nickel Alloy vs. Invar 4J36
Parameter | 4J52 Fe-Ni | 4J50 Nickel Alloy | Invar 4J36 |
|---|---|---|---|
Composition | 52% Ni, 48% Fe | 50% Ni, 50% Fe | 36% Ni, 64% Fe |
CTE (ppm/°C, 20-400°C) | ~4.9 | ~4.8 | ~1.2–1.5 |
Temperature Range | -40°C to 400°C | -40°C to 400°C | -50°C to 230°C |
Curie Temperature | ~425°C | ~420°C | ~279°C |
Yield Strength (MPa) | ~345 | ~340 | ~260–300 |
Tensile Strength (MPa) | ~555 | ~550 | ~450–550 |
Density (g/cm³) | 8.23 | 8.21 | 8.05 |
Applications | Optical mounts, laser systems | Sensors, optical mounts | Aerospace tooling, composite molds |
Corrosion Resistance | Excellent | Excellent | Moderate |
We know the market offers plenty of alloy options, but our 4J52 Fe-Ni Alloy Bar stands out for its quality and precision. Our rigorous quality control ensures a consistent CTE and robust mechanical properties (yield strength ~345 MPa, tensile strength ~555 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 excellent machinability and corrosion resistance give it an edge in optical applications. With years of expertise, we’re your trusted partner for high-performance alloy solutions.
Why Choose Our 4J52 Fe-Ni Alloy Bar?
Our 4J52 Fe-Ni Alloy Bar is built for precision in optical and laser devices. Its low thermal expansion, durability, and corrosion resistance make it ideal for mounts, sensors, and laser systems. Whether you’re in aerospace, medical tech, or advanced manufacturing, our bar ensures your components stay accurate and reliable. Contact us today to see how 4J52 can elevate your optical projects!
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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 4J52 Fe-Ni Alloy Bar?
It’s a nickel-iron alloy bar designed for high-accuracy optical and laser device applications, offering low thermal expansion for precision stability.What are the key properties of 4J52?
It has a CTE of ~4.9 ppm/°C (20-400°C), excellent corrosion resistance, and high mechanical strength, ideal for optical components.What industries use 4J52 Alloy Bar?
Optical engineering, aerospace, electronics, and scientific instrumentation rely on it for thermally stable, high-precision parts.What are common applications for 4J52?
It’s used in optical mounts, laser systems, precision sensors, and telescope components requiring minimal thermal distortion.How does 4J52 compare to other precision alloys?
Its 52% nickel content provides a balanced CTE and superior dimensional stability compared to many alloys.What temperature range is 4J52 effective in?
It maintains low thermal expansion from -40°C to 400°C, ensuring reliability in temperature-sensitive optical environments.Is 4J52 weldable or machinable?
Yes, it’s weldable and machinable with standard techniques, offering excellent workability for intricate components.How does 4J52 align with industry trends?
It supports the growing demand for high-precision materials in laser technology, aerospace optics, and advanced manufacturing.
