4J47 is a nickel-iron soft magnetic alloy that stands out for its high magnetic permeability, low coercive force, and stable magnetic performance. Containing approximately 47% nickel and 53% iron, this alloy is engineered to deliver precise magnetic response and minimal energy loss in alternating magnetic fields. It’s widely used in transformer cores, relays, magnetic amplifiers, and precision sensors, where efficient magnetic performance and dimensional stability are essential.
At DLX Alloy, we produce 4J47 wire through advanced vacuum melting, hot rolling, and fine wire drawing processes. This ensures consistent composition, fine grain structure, and superior purity. Our strict quality control and optimized annealing treatments guarantee that the magnetic properties of 4J47 wire remain reliable under long-term industrial operation.
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High Magnetic Permeability – Enables fast magnetic flux response and low magnetizing current.
Low Coercive Force – Reduces magnetic losses during rapid magnetization cycles.
Excellent Thermal Stability – Performs reliably across variable operating temperatures.
Strong Mechanical Strength – Allows consistent wire drawing and forming into fine diameters.
Stable Magnetic Performance – Maintains low hysteresis and precise control in AC and DC circuits.
Customizable Solutions – DLX provides different diameters, heat treatments, and packaging options based on customer application requirements.
Alloy Composition Table
Alloy Grades | C | S | P | Mn | Si | Ni | Cr | Co | Mo | Cu | Al | Nb | Fe | Other Elements |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1J06 | 0.04 | 0.015 | 0.015 | ≤0.10 | ≤0.15 | - | - | - | - | - | 5.5-6.5 | - | Rest | - |
1J12 | 0.03 | 0.015 | 0.015 | ≤0.10 | ≤0.15 | - | - | - | - | - | 11.6-12.4 | - | Rest | - |
1J17 | 0.03 | 0.02 | 0.02 | ≤0.60 | ≤0.20 | - | 15.5-16.5 | - | - | - | - | - | Rest | - |
1J18 | 0.03 | 0.02 | 0.02 | 0.3-0.7 | ≤0.15 | 0.5-0.7 | 17-18.5 | - | - | - | - | - | Rest | Ti: 0.3-0.7 |
0.04 | 0.02 | 0.02 | ≤0.3 | ≤0.3 | ≤0.5 | - | 49-51 | - | ≤0.2 | - | - | Rest | V: 0.8-1.8 | |
1J30 | 0.04 | 0.02 | 0.02 | ≤0.40 | ≤0.30 | 29.5-30.5 | - | - | - | - | - | - | Rest | - |
0.03 | 0.02 | 0.02 | ≤0.60 | ≤0.20 | 35.0-37.0 | - | - | - | - | - | - | Rest | - | |
1J38 | 0.03 | 0.05 | 0.02 | 0.3-0.6 | 0.15-0.3 | 37.5-38.5 | 12.5-13.5 | - | - | - | - | - | Rest | - |
1J46 | 0.03 | 0.02 | 0.02 | 0.6-1.1 | 0.15-0.3 | 45.0-46.5 | - | - | - | ≤0.2 | - | - | Rest | - |
0.03 | 0.02 | 0.02 | 0.3-0.6 | 0.15-0.3 | 49-50.5 | - | - | - | ≤0.2 | - | - | Rest | - | |
1J51 | 0.03 | 0.02 | 0.02 | 0.3-0.6 | 0.15-0.3 | 49-50.5 | - | - | - | ≤0.2 | - | - | Rest | - |
1J54 | 0.03 | 0.02 | 0.02 | 0.3-0.6 | 1.1-1.4 | 49.5-51 | 3.8-4.2 | - | - | ≤0.2 | - | - | Rest | - |
1J76 | 0.03 | 0.02 | 0.02 | 0.3-0.6 | 0.15-0.3 | 75.0-76.5 | 1.8-2.2 | - | - | 4.8-5.2 | - | - | Rest | - |
1J77 | 0.03 | 0.02 | 0.02 | 0.3-0.6 | 0.15-0.3 | 75.5-78 | - | - | 3.9-4.5 | 4.8-6.0 | - | - | Rest | - |
1J79 | 0.03 | 0.02 | 0.02 | 0.6-1.10 | 0.3-0.5 | 78.5-80.0 | - | - | 3.8-4.1 | ≤0.2 | - | - | Rest | - |
1J80 | 0.03 | 0.02 | 0.02 | 0.6-1.10 | 1.1-1.5 | 79.0-81.5 | 2.6-3.0 | - | - | ≤0.2 | - | - | Rest | - |
0.03 | 0.02 | 0.02 | 0.3-0.60 | 0.15-0.3 | 79.0-81.0 | - | - | 4.8-5.2 | ≤0.2 | - | - | Rest | - | |
1J87 | 0.03 | 0.02 | 0.02 | 0.3-0.6 | ≤0.3 | 78.5-80.5 | - | - | 1.6-2.2 | - | - | 6.5-7.5 | Rest | - |
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| Property | 4J47 Alloy | 4J36 Alloy | 1J85 Alloy |
|---|---|---|---|
| Nickel Content (%) | 47 | 36 | 80 |
| Density (g/cm³) | 8.2 | 8.1 | 8.7 |
| Electrical Resistivity (μΩ·m) | 0.60 | 0.80 | 0.45 |
| Saturation Magnetic Induction (T) | 1.55 | 1.45 | 0.75 |
| Coercive Force (A/m) | ≤40 | ≤50 | ≤30 |
| Maximum Permeability (μmax) | ≥80,000 | ≥15,000 | ≥70,000 |
| Curie Temperature (°C) | ~480 | ~230 | ~450 |
| Typical Application | Transformers, Relays | Precision Parts | Magnetic Shields |
This comparison highlights that 4J47 offers a balanced combination of magnetic efficiency and mechanical strength, making it ideal for medium- to high-performance magnetic circuits. While high-nickel alloys may deliver higher permeability, 4J47 achieves similar results at a more economical cost and with better mechanical workability, which is particularly valuable for mass production of transformer and relay components.
Applications
1. Transformer Cores
4J47 wire is widely used in transformer cores and magnetic circuits because of its high permeability and low hysteresis loss. It helps minimize energy loss, improving transformer efficiency, especially in precision control or low-signal transformers.
2. Electromagnetic Relays
Its low coercive force and fast magnetization response make 4J47 wire ideal for relay cores. These characteristics allow for quick actuation, stable operation, and low noise in both AC and DC electromagnetic systems.
3. Magnetic Amplifiers
In amplifiers and control devices, 4J47 provides stable magnetic saturation characteristics, ensuring accurate performance in feedback circuits and automation systems.
4. Precision Instruments
Used in sensors and electromagnetic measurement devices, 4J47 ensures steady performance and minimal signal distortion caused by magnetic interference.
5. Aerospace and Automotive Electronics
In advanced navigation systems, relay control circuits, and sensor components, 4J47 wire helps maintain precision and reliability under varying temperature and magnetic conditions.
Industry Trends
The market demand for soft magnetic alloys such as 4J47 continues to grow as industries focus on energy efficiency, signal precision, and device miniaturization.
Energy Systems: In transformers and relays for renewable energy applications, 4J47 improves conversion efficiency and power stability.
Automation and Robotics: Relays and control coils made from 4J47 enable fast and accurate switching, supporting intelligent automation.
Automotive Electronics: Electric and hybrid vehicles rely on soft magnetic materials for sensors and power conversion systems, where 4J47 provides reliable magnetic sensitivity.
Aerospace & Defense: Used in magnetic control systems where consistent behavior under stress is critical.
As smart grids, EVs, and high-frequency control systems continue to expand, demand for alloys like 4J47 will remain strong due to its cost-performance advantage and stability in medium-frequency magnetic applications.
DLX Alloy Company Advantages
At DLX Alloy, we are committed to delivering premium-grade soft magnetic materials that meet the evolving needs of modern industry. Our 4J47 wire reflects our dedication to precision, consistency, and customization.
1. Advanced Production Technology
We employ vacuum melting and refining, ensuring low impurity levels and stable chemical composition. This results in reliable magnetic behavior across long production runs.
2. Precision Annealing and Control
DLX’s controlled annealing process optimizes grain structure and reduces stress, giving our 4J47 wire superior magnetic softness and repeatability.
3. Custom Specifications
Wire diameters, tensile properties, and packaging can all be customized according to client needs—ideal for both large-scale and specialty transformer or relay production.
4. Comprehensive Testing
Every batch undergoes strict testing for permeability, coercive force, saturation induction, and dimensional accuracy to ensure consistent performance.
5. Global Reach & Reliable Supply
Our supply network covers Asia, North America, and Europe, ensuring stable delivery and technical support for manufacturers worldwide.
Market Analysis
The soft magnetic materials market is expanding alongside developments in electrical control, precision measurement, and power electronics. 4J47 alloy plays a crucial role in these sectors due to its balance of high permeability and mechanical reliability.
Compared with higher-nickel alloys, 4J47 offers:
Excellent cost-effectiveness for medium-sensitivity applications.
Strong machinability during wire drawing and coil forming.
High stability under cyclic magnetic loading.
Lower overall energy loss, improving system efficiency.
In global markets, manufacturers are increasingly choosing 4J47 as a sustainable alternative to more expensive alloys, especially in energy-efficient transformers and precision electromagnetic relays. As manufacturing technologies advance, DLX’s high-quality 4J47 products continue to support this transition toward smarter, more efficient electrical systems.
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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1. What is the composition of 4J47 alloy?
It contains about 47% nickel and 53% iron, providing excellent soft magnetic characteristics.
2. What are the main advantages of 4J47 wire?
High permeability, low coercive force, and stable performance for efficient magnetic circuits.
3. What are typical applications of 4J47 wire?
Used in transformer cores, relays, magnetic amplifiers, and other soft magnetic devices.
4. What makes 4J47 suitable for transformers and relays?
Its magnetic softness allows quick magnetization and demagnetization, improving switching speed and reducing loss.
5. Can DLX customize wire dimensions?
Yes, DLX offers a wide range of diameters and heat treatment options tailored to customer needs.
6. What operating temperatures can 4J47 handle?
It performs well up to about 480°C, maintaining stable magnetic properties.
7. How does DLX ensure consistent quality?
By using vacuum melting, precise annealing, and full property testing for every batch.
8. Is 4J47 cost-effective compared to high-nickel alloys?
Yes, it provides similar performance at a lower cost, ideal for industrial-scale production.
Conclusion
The 4J47 nickel-iron soft magnetic alloy wire offers a reliable and efficient solution for modern transformer and relay applications. With its excellent permeability, low coercive force, and strong thermal stability, it ensures precise magnetic control and low energy loss in demanding electrical systems.
At DLX Alloy, we combine cutting-edge metallurgy with rigorous quality control to deliver consistent 4J47 wire products to customers around the world. Whether used in transformers, relays, or precision control systems, DLX’s 4J47 material enhances performance, durability, and efficiency.
As industries continue moving toward higher energy efficiency and intelligent control systems, DLX remains at the forefront—providing reliable magnetic alloy solutions that power the next generation of electrical innovation.
