The 4J54 high nickel Soft Magnetic Alloy is one of the most reliable materials for high-performance magnetic shielding, precision instrumentation, and transformer cores. At DLX Alloy, we specialize in producing precision-engineered 4J54 plates with stable magnetic permeability, high saturation flux density, and consistent quality that meets the demands of industrial and electronic applications worldwide.
4J54 (also known as Ni54Fe alloy) is a high-nickel, iron-based soft magnetic material with approximately 54% nickel content. This alloy provides excellent magnetic softness, meaning it can be magnetized and demagnetized easily. Its magnetic properties are stable under varying environmental conditions, making it ideal for shielding against magnetic interference and for core materials requiring low coercive force and high permeability.
DLX’s 4J54 plates are manufactured through precision melting and vacuum refining processes. We utilize intermediate frequency furnaces and cold rolling technology to achieve fine-grain structures and excellent surface finish. Our plates undergo strict quality inspections—covering magnetic, dimensional, and surface uniformity tests—to guarantee consistency from batch to batch.
|
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 |
- |
|
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 |
- |
|
1J50 |
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 |
- |
|
1J85 |
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 |
- |
For more details, pls directly contact us.
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Magnetic shielding: Used in sensors, medical imaging devices (like MRI), and electronic enclosures to block external magnetic interference.
-
Magnetic cores: Essential for transformers, inductors, and motor components requiring efficient energy transfer and minimal loss.
-
Relay and solenoid parts: Ensures responsive and stable performance in automotive and industrial control systems.
-
Aerospace and defense: Provides stable magnetic performance under temperature and field fluctuations.
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 53.0–55.0 |
| Iron (Fe) | Balance |
| Manganese (Mn) | ≤0.60 |
| Silicon (Si) | ≤0.30 |
| Carbon (C) | ≤0.03 |
| Sulfur (S) | ≤0.020 |
| Phosphorus (P) | ≤0.020 |
Typical Physical and Magnetic Properties
| Property | Unit | Typical Value |
|---|---|---|
| Density | g/cm³ | 8.7 |
| Curie Temperature | °C | ~470 |
| Saturation Flux Density (Bs) | T | 1.6 |
| Maximum Permeability (μmax) | - | ≥50,000 |
| Coercive Force (Hc) | A/m | ≤80 |
| Resistivity | μΩ·cm | 30–40 |
| Hardness (HV) | - | ≤160 |
The demand for high-nickel soft magnetic materials like 4J54 is rapidly increasing with the expansion of smart electronics, EVs, and renewable energy systems. As devices become more compact and sensitive, magnetic shielding requirements grow stricter. Global trends show a shift toward high-permeability and low-loss alloys to enhance efficiency and reduce electromagnetic noise.
In aerospace and high-precision instrumentation, 4J54’s stable magnetic properties under thermal stress have made it a preferred choice over conventional low-nickel alloys. Additionally, as global industries push for high-frequency and low-noise electronics, the role of soft magnetic materials continues to expand.
At DLX Alloy, we don’t just produce magnetic alloys—we engineer materials for performance reliability. Our advantages include:
-
Controlled Composition: We use high-purity nickel and iron sources to ensure precise alloy ratios and superior consistency.
-
Vacuum Melting & Heat Treatment: Advanced refining reduces impurities and enhances magnetic softness, ensuring the lowest coercive force.
-
Surface Precision: We achieve ultra-flat plate surfaces ideal for laminations and electronic shielding structures.
-
Tailored Solutions: We provide custom heat-treated 4J54 plates with specific magnetic orientations, thickness, and dimensional tolerances based on client design.
-
Global Certification: Our materials meet international standards such as ASTM, IEC, and GB/T. Independent lab tests from third-party institutions verify our permeability and Bs levels, ensuring data-backed reliability.
-
Expertise & Support: DLX’s technical engineers provide guidance on selecting and processing 4J54 plates for maximum performance in your end-use application.
| Property | 4J54 (DLX) | 4J50 | 4J79 |
|---|---|---|---|
| Nickel Content (%) | 54 | 50 | 79 |
| Saturation Flux Density (T) | 1.6 | 1.7 | 0.8 |
| Maximum Permeability | ≥50,000 | 40,000 | ≥80,000 |
| Coercive Force (A/m) | ≤80 | ≤100 | ≤40 |
| Curie Temperature (°C) | 470 | 450 | 430 |
| Typical Application | Magnetic shielding, core | Transformer cores | Precision sensors |
4J54 achieves a balance between high saturation flux density and high permeability, providing better efficiency in magnetic shielding and core applications compared with 4J79, while offering more stable performance than 4J50 under temperature variation.
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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We support all kinds of testing:
FAQs:
1. What makes 4J54 different from other soft magnetic alloys?
4J54 combines high permeability with a high saturation flux density, allowing it to handle stronger magnetic fields while maintaining low energy loss—ideal for shielding and magnetic core use.
2. Can 4J54 be used in high-temperature environments?
Yes. With a Curie temperature of around 470°C, 4J54 maintains stable magnetic properties in moderately high-temperature conditions.
3. What forms does DLX supply 4J54 in?
We provide it in plates, sheets, and strips with customizable thicknesses ranging from 0.1mm to 10mm, suitable for both industrial and precision device manufacturing.
4. How does DLX ensure magnetic consistency between batches?
Through vacuum refining, uniform annealing, and batch-level magnetic property inspection using hysteresis loop tracers and permeameters.
5. Can 4J54 be machined or welded easily?
Yes. DLX’s 4J54 plates feature excellent machinability and weldability when processed with proper cooling and post-annealing.
6. How is 4J54 tested for magnetic performance?
Our QC team performs magnetic testing (μ, Bs, Hc), hardness checks, and surface inspections. Additionally, third-party labs validate our data for export documentation.
7. What industries commonly use DLX’s 4J54 alloy?
Electronics, medical equipment, aerospace, communication systems, and precision sensors.
8. Does DLX offer technical consultation for application design?
Absolutely. Our engineering team helps customers optimize component design, annealing schedules, and magnetic shielding structures using 4J54 material.
Over the past decade, DLX Alloy has collaborated with global customers in the electromagnetic, automotive, and aerospace sectors, helping them reduce electromagnetic interference by over 30% using optimized 4J54 shielding plates. Through continuous process innovation—like vacuum hot rolling and magnetic field annealing—DLX has achieved exceptional uniformity in permeability and lower coercive force values than conventional production.
As technology continues evolving toward miniaturization and low-loss systems, 4J54 remains a core material in high-frequency magnetic circuits. DLX Alloy stands ready to deliver high-performance solutions supported by data, certification, and proven industry results.
