Our 4J54 Expansion Alloy Bar is a top performer for precision engineering, delivering low thermal expansion for rock-solid stability. With 54% nickel and 46% iron, it boasts a CTE of ~5.1 ppm/°C (20-400°C), ensuring your components stay steady through temperature changes. It’s tough, corrosion-resistant, and easy to machine, making it perfect for high-accuracy parts. Whether you’re crafting molds or sensors, our 4J54 bar provides the reliability you need to get it right.
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The precision engineering market is growing fast, with a projected CAGR of 5.8% through 2032, driven by advancements in aerospace, electronics, and automation. As industries demand smaller, more reliable components, low-expansion alloys like our 4J54 bar are critical. Aerospace needs stable materials for optical systems and sensors, while electronics rely on them for connectors and miniaturized parts. The rise of smart manufacturing and IoT is fueling the need for alloys that perform under thermal stress. Our 4J54 bar is designed to meet these trends with unmatched precision and durability.
| 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 4J54 Expansion Alloy Bar is a versatile choice for precision engineering. It’s used in precision molds for aerospace and automotive, where dimensional accuracy is a must. Optical systems, like those in telescopes or microscopes, rely on its stability for consistent alignment. In electronics, it’s perfect for temperature sensors and connectors that resist thermal distortion. Scientific instruments, such as precision gauges and spectrometers, also benefit from its low CTE. Wherever high accuracy is required, our 4J54 bar delivers.
Comparison Table: 4J54 Expansion Alloy vs. 4J52 Fe-Ni vs. Invar 4J36
Parameter | 4J54 Expansion Alloy | 4J52 Fe-Ni | Invar 4J36 |
|---|---|---|---|
Composition | 54% Ni, 46% Fe | 52% Ni, 48% Fe | 36% Ni, 64% Fe |
CTE (ppm/°C, 20-400°C) | ~5.1 | ~4.9 | ~1.2–1.5 |
Temperature Range | -40°C to 400°C | -40°C to 400°C | -50°C to 230°C |
Curie Temperature | ~430°C | ~425°C | ~279°C |
Yield Strength (MPa) | ~350 | ~345 | ~260–300 |
Tensile Strength (MPa) | ~560 | ~555 | ~450–550 |
Density (g/cm³) | 8.24 | 8.23 | 8.05 |
Applications | Precision molds, optical systems | Optical mounts, laser systems | Aerospace tooling, composite molds |
Corrosion Resistance | Excellent | Excellent | Moderate |
We know the market offers plenty of alloy options, but our 4J54 Expansion 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 ~560 MPa). We provide customized bar sizes and forms to match your exact needs, with faster delivery than many alternatives. Our efficient production process keeps costs low without sacrificing quality, and our alloy’s excellent corrosion resistance and machinability give it an edge in precision applications. With years of expertise, we’re your trusted partner for high-performance alloy solutions.
Why Choose Our 4J54 Expansion Alloy Bar?
Our 4J54 Expansion Alloy Bar is engineered for precision and reliability. Its low thermal expansion, durability, and corrosion resistance make it ideal for molds, optical systems, and electronics. Whether you’re in aerospace, electronics, or advanced manufacturing, our bar ensures your components perform flawlessly. Contact us today to see how 4J54 can elevate your precision engineering 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 4J54 Expansion Alloy Bar?
It’s a nickel-iron alloy bar designed for robust performance in precision engineering, offering low thermal expansion for stable components.What are the key properties of 4J54?
It has a CTE of ~5.1 ppm/°C (20-400°C), excellent corrosion resistance, and high mechanical strength, ideal for precision applications.What industries use 4J54 Alloy Bar?
Precision engineering, aerospace, electronics, and scientific instrumentation rely on it for thermally stable components.What are common applications for 4J54?
It’s used in precision molds, optical systems, temperature sensors, and electronic connectors requiring dimensional stability.How does 4J54 compare to other expansion alloys?
Its 54% nickel content provides a balanced CTE and superior durability compared to many similar alloys.What temperature range is 4J54 effective in?
It maintains low thermal expansion from -40°C to 400°C, ensuring reliability in varying temperature environments.Is 4J54 weldable or machinable?
Yes, it’s weldable and machinable with standard techniques, offering excellent workability for complex components.How does 4J54 align with industry trends?
It supports the demand for high-precision, thermally stable materials in aerospace, electronics, and automation, driven by miniaturization and smart manufacturing.
