4J47 is a nickel-iron soft magnetic alloy known for its high permeability, low coercive force, and excellent magnetic shielding properties. With approximately 47% nickel and 53% iron composition, 4J47 provides a stable and reliable magnetic response across a wide frequency range. It’s widely used in environments where it’s necessary to protect sensitive electronic components or precision instruments from external magnetic interference.
At DLX Alloy, we produce 4J47 alloy wire with advanced vacuum melting and precision drawing technology, ensuring high purity, tight dimensional tolerances, and consistent soft magnetic performance. Our 4J47 wire is engineered to meet the needs of applications in telecommunications, medical electronics, aerospace, and industrial control systems where magnetic stability and shielding effectiveness are critical.
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High Magnetic Permeability – Ensures efficient magnetic flux capture and excellent shielding performance.
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Low Coercive Force – Reduces magnetic loss, improving energy efficiency and stability.
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Excellent Magnetic Shielding – Blocks low-frequency magnetic fields effectively, protecting precision circuits.
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Stable Magnetic Properties – Maintains performance under different temperatures and magnetic field conditions.
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Customizable Forms – DLX provides wire, strip, or custom-shaped materials for various industrial applications.
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 |
|
1J22 |
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 |
- |
|
1J36 |
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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Technical Comparison Table
| Property | 4J47 Alloy | 4J36 Alloy | 4J50 Alloy |
|---|---|---|---|
| Nickel Content (%) | 47 | 36 | 50 |
| Density (g/cm³) | 8.2 | 8.1 | 8.3 |
| Electrical Resistivity (μΩ·m) | 0.60 | 0.80 | 0.70 |
| Saturation Magnetic Induction (T) | 1.55 | 1.45 | 1.50 |
| Coercive Force (A/m) | ≤40 | ≤50 | ≤30 |
| Maximum Permeability (μmax) | ≥80000 | ≥15000 | ≥100000 |
| Curie Temperature (°C) | ~480 | ~230 | ~500 |
| Primary Application | Magnetic Shielding | Precision Components | Electromagnetic Devices |
This comparison highlights that 4J47 achieves an excellent balance between high permeability and mechanical strength, making it one of the most reliable materials for magnetic shielding and sensitive magnetic circuits.
Applications
1. Magnetic Shielding Covers
4J47 alloy wire is widely used to manufacture shielding enclosures and sleeves that prevent electromagnetic interference (EMI) from affecting sensors, amplifiers, or communication modules.
2. Precision Measuring Instruments
Its high permeability enables accurate control of magnetic fields, making it ideal for precision instruments, magnetic balance systems, and laboratory devices.
3. Aerospace and Defense Systems
In aircraft navigation and communication systems, 4J47 material helps ensure stable operation under complex magnetic environments.
4. Medical Electronics
Used in MRI systems, ECG devices, and other sensitive diagnostic instruments to reduce interference and maintain signal accuracy.
5. Audio and Telecommunication Equipment
Improves sound quality and communication stability by isolating internal circuits from surrounding electromagnetic noise.
Industry Trends
The demand for magnetic shielding materials is increasing due to the rapid development of high-frequency electronics, precision sensors, and smart devices. As modern systems become smaller and more integrated, their sensitivity to external magnetic interference grows—creating a strong need for reliable shielding alloys like 4J47.
In the fields of medical technology, automotive electronics, and aerospace systems, the role of magnetic shielding has become crucial. 4J47 stands out because of its consistent performance, mechanical durability, and compatibility with thin-wall or flexible shielding components.
The ongoing shift toward smart manufacturing and electromagnetic compatibility (EMC) design means materials such as 4J47 will continue to be essential for ensuring safety, accuracy, and performance stability across industries.
DLX Alloy Company Advantages
1. Advanced Manufacturing Process
DLX Alloy applies vacuum melting and precise thermal control to maintain uniform microstructure and purity. This ensures superior magnetic softness and reproducibility across every batch of 4J47 wire.
2. Strict Quality Control
Each batch undergoes full property testing, including permeability, coercive force, and magnetic loss assessment, to guarantee reliable shielding capability.
3. Customization & Flexibility
We offer 4J47 in various diameters, mechanical states, and annealed conditions. Whether customers require ultra-fine wires for medical electronics or thicker forms for shielding covers, DLX provides tailored solutions.
4. Global Distribution & Support
With a well-established global logistics system, DLX delivers stable supply and consistent quality assurance to clients in Asia, Europe, and North America.
5. Expertise in Magnetic Materials
Our technical team provides professional advice on alloy selection, heat treatment, and shielding structure optimization, helping customers achieve the best magnetic control results in their applications.
The global market for magnetic shielding alloys is expanding rapidly, driven by advancements in electric vehicles, 5G communication, renewable energy systems, and medical imaging technologies. 4J47 alloy, known for its high permeability and reliable performance, has become a key material for electromagnetic interference management.
Compared to alternative materials, 4J47 offers:
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High shielding efficiency across a wide magnetic frequency range.
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Excellent mechanical stability, reducing deformation risk during manufacturing.
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Strong resistance to thermal and mechanical stress, ensuring consistent shielding even in complex environments.
As demand for low-noise, high-precision, and energy-efficient equipment grows, 4J47 continues to play an indispensable role in achieving magnetic isolation and signal stability.
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:
1. What is the composition of 4J47 alloy?
It’s composed of approximately 47% nickel and 53% iron, offering excellent magnetic softness and shielding properties.
2. What are the main uses of 4J47 wire?
It’s mainly used in magnetic shielding components, sensor protection, and precision electronic circuits.
3. Why is 4J47 suitable for magnetic shielding?
Because of its high magnetic permeability, it absorbs and redirects magnetic fields efficiently, protecting sensitive devices.
4. What is the Curie temperature of 4J47?
Around 480°C, meaning it retains magnetic characteristics at moderate operating temperatures.
5. Does DLX provide customized wire sizes?
Yes, DLX offers customized diameters, lengths, and surface conditions based on application requirements.
6. Can 4J47 wire be used in medical equipment?
Yes, it’s ideal for medical electronics like MRI systems and signal detection devices where shielding precision is vital.
7. How does DLX ensure consistent performance?
Through strict process control, vacuum melting, and comprehensive magnetic property testing for each batch.
8. What makes 4J47 better than other soft magnetic alloys?
It combines high permeability, mechanical strength, and cost efficiency, making it versatile for both industrial and precision applications.
Conclusion
4J47 nickel-iron soft magnetic alloy wire is one of the most reliable materials for magnetic shielding applications. Its balance of high permeability, low coercive force, and stable magnetic properties ensures excellent performance in environments requiring electromagnetic protection and signal precision.
DLX Alloy continues to lead in producing premium-grade 4J47 wire with superior consistency and customizable specifications. Backed by advanced manufacturing technology and a global support network, DLX provides materials that empower innovation in aerospace, medical electronics, telecommunications, and precision industries.
As the demand for efficient electromagnetic shielding grows, DLX remains committed to offering material solutions that enhance performance, reduce interference, and support next-generation electronic advancements.
