Our 4J45 Iron-Nickel Alloy Wire is a top-tier choice for precision instrument manufacturing. With 45% nickel and 55% iron, it delivers a low CTE of ~4.5 ppm/°C (20-300°C), ensuring your components stay dimensionally stable no matter the temperature swings. It’s strong, corrosion-resistant, and easy to work with, making it perfect for crafting high-accuracy parts. From gauges to optical systems, our 4J45 wire is built to keep your instruments performing at their best.
For more details, pls directly contact us.
The precision manufacturing sector is thriving, with a projected CAGR of 5.5% through 2032, fueled by advancements in aerospace, electronics, and automation. As industries push for smaller, more accurate components, low- Expansion Alloy s like 4J45 are in high demand. Aerospace relies on them for optical and navigation systems, while electronics need stable materials for connectors and sensors. The rise of smart manufacturing and IoT is driving the need for precision instruments that can handle tight tolerances. Our 4J45 wire is designed to meet these challenges, offering the stability and reliability modern industries demand.
| 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 |
For more details, pls directly contact us.
Our 4J45 Iron-Nickel Alloy Wire is a workhorse in precision manufacturing. It’s used in high-accuracy gauges and meters, ensuring consistent readings in scientific and industrial settings. Optical instruments, like those in telescopes and microscopes, rely on 4J45 for stable mounts and frames. In electronics, it’s a go-to for temperature regulators and connectors that need to resist thermal distortion. You’ll also find it in aerospace navigation systems, where its low CTE ensures precision under varying conditions. Wherever accuracy is critical, our 4J45 wire delivers.
Comparison Table: 4J45 Iron-Nickel vs. 4J44 Precision Alloy vs. Standard Invar
Parameter | 4J45 Iron-Nickel | 4J44 Precision Alloy | Standard Invar |
|---|---|---|---|
Composition | 45% Ni, 55% Fe | 40% Ni, 14% Co, 46% Fe | 36% Ni, 64% Fe |
CTE (ppm/°C, 20-300°C) | ~4.5 | ~5.0 | ~1.2–1.5 |
Temperature Range | -40°C to 300°C | -50°C to 500°C | -50°C to 230°C |
Curie Temperature | ~400°C | ~415°C | ~279°C |
Yield Strength (MPa) | ~320 | ~355 | ~260–300 |
Tensile Strength (MPa) | ~530 | ~550 | ~450–550 |
Density (g/cm³) | 8.20 | 8.22 | 8.05 |
Applications | Precision gauges, optical instruments | Sensors, pressure transducers | Clocks, precision instruments |
Corrosion Resistance | Good | Excellent | Moderate |
We know the market’s full of alloy options, but our 4J45 Iron-Nickel Alloy Wire stands out for its quality and versatility. Our rigorous quality control ensures a consistent CTE and solid mechanical properties (yield strength ~320 MPa, tensile strength ~530 MPa). We offer customized wire sizes and forms, tailored to your needs, with faster lead times than many alternatives. Our streamlined production process keeps costs down without sacrificing performance, and our alloy’s balanced properties give it an edge in precision applications. With decades of expertise, we’re the partner you can rely on for top-notch alloy solutions.
Why Choose Our 4J45 Iron-Nickel Alloy Wire?
Our 4J45 Iron-Nickel Alloy Wire is engineered for precision instrument manufacturing. Its low thermal expansion, durability, and corrosion resistance make it ideal for gauges, optical systems, and electronics. Whether you’re building for aerospace or advanced manufacturing, our wire ensures your components stay accurate and reliable. Contact us today to see how 4J45 can elevate your precision projects!
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.
Client Visits
Building Stronger Partnerships
We support all kinds of testing:
FAQs
What is 4J45 Iron-Nickel Alloy Wire?
It’s a precision iron-nickel alloy wire with a low coefficient of thermal expansion, designed for high-accuracy components in instrument manufacturing.What are the key properties of 4J45?
It offers a CTE of ~4.5 ppm/°C (20-300°C), excellent dimensional stability, and good corrosion resistance, ideal for precision instruments.What industries use 4J45 Alloy Wire?
Precision manufacturing, aerospace, electronics, and scientific instrumentation rely on it for stable, high-performance components.What are common applications for 4J45?
It’s used in precision gauges, optical instruments, temperature regulators, and electronic connectors requiring minimal thermal expansion.How does 4J45 compare to other precision alloys?
Its 45% nickel content provides a balanced CTE and strength, offering better stability than many similar alloys for precision applications.What temperature range is 4J45 effective in?
It maintains low thermal expansion from -40°C to 300°C, ensuring reliability in moderate temperature environments.Is 4J45 weldable or machinable?
Yes, it’s weldable and machinable with standard techniques, though slow speeds and proper tooling are recommended for optimal results.How does 4J45 align with industry trends?
It supports the demand for high-precision materials in advanced manufacturing, driven by trends in automation, aerospace, and miniaturized electronics.
