The 4J52 nickel-iron alloy plate is a critical soft magnetic material designed for high-performance magnetic amplifiers, precision sensors, and control devices. At DLX Alloy, we focus on producing 4J52 alloy plates that deliver exceptional magnetic stability, consistent permeability, and superior processability. With extensive production experience and third-party verification, our materials have been widely recognized for their quality, reliability, and adaptability to demanding magnetic circuit applications.
4J52 is a soft magnetic alloy composed of approximately 52% nickel and 48% iron, optimized for excellent magnetic permeability and low coercivity. The slightly higher nickel content compared to 4J50 gives it improved magnetic stability and slightly lower magnetostriction, which is especially valuable in precision sensors and control components that require highly stable magnetic properties under variable conditions.
Key Properties of 4J52 Alloy:
-
High initial and maximum permeability (μmax ≥ 90,000) — ideal for sensitive magnetic response.
-
Low coercive force (Hc ≤ 6 A/m) — minimizes energy loss during magnetization and demagnetization cycles.
-
Low magnetostriction — ensures dimensional and magnetic stability under stress or vibration.
-
Excellent thermal and chemical stability — maintains magnetic characteristics under fluctuating temperature environments.
-
Good processability — suitable for rolling, cutting, and forming without property degradation after proper annealing.
At DLX, the alloy is produced under vacuum induction melting to ensure extremely low oxygen and carbon impurities. After multiple cold rolling and hydrogen annealing cycles, the alloy achieves a fine and uniform grain structure that enhances its soft magnetic characteristics.
|
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 |
- |
|
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 |
- |
For more details, pls directly contact us.
4J52 alloy plates are widely used in the fields of magnetic amplification, sensing, and precision magnetic control. Their consistent magnetic performance and low coercivity make them ideal for both low-frequency and high-frequency magnetic circuit applications.
Main Application Areas:
-
Magnetic Amplifiers: Used in voltage regulation, power control, and signal amplification systems.
-
Sensors and Transducers: Ideal for magnetic field, pressure, and position sensors that require accuracy and stability.
-
Magnetic Shields: Protects sensitive components in electronic and measurement systems from electromagnetic interference.
-
Relays and Control Devices: Enhances switching sensitivity and minimizes response delay.
-
Aerospace and Navigation Systems: Provides stable magnetic properties under wide temperature and vibration ranges.
-
Precision Instruments: Used in instruments that require magnetic balance and repeatable measurements.
In advanced industrial applications, 4J52 plates from DLX are often used in precision-engineered components where magnetic consistency and stress control are critical to system performance.
Industry Trends
As modern technology shifts toward high-precision automation, renewable energy systems, and intelligent sensing, materials like 4J52 are gaining increased importance. Its combination of magnetic stability, low hysteresis loss, and controlled permeability supports the miniaturization and energy efficiency required by today’s advanced systems.
The magnetic materials industry has also seen a rise in demand from semiconductor and aerospace sectors, where 4J52 is used in devices that operate in extreme environments. DLX Alloy has partnered with leading third-party testing agencies such as SGS and TUV to validate the stability, chemical composition, and magnetic performance of our 4J52 alloy. Our material fully meets international standards, including ASTM A753 and GB/T 15002, ensuring compatibility with global manufacturing requirements.
Furthermore, with the rise of AI-driven control systems and magnetic feedback circuits, DLX’s precision-controlled 4J52 plates are increasingly being integrated into next-generation sensing technologies.
| Property | DLX 4J52 Alloy Plate | 4J50 Alloy Plate | Standard Iron-Silicon Steel |
|---|---|---|---|
| Nickel Content (%) | 51–53 | 49–51 | — |
| Density (g/cm³) | 8.20 | 8.15 | 7.65 |
| Maximum Permeability (μmax) | ≥90,000 | ≥80,000 | ~10,000 |
| Coercive Force (A/m) | ≤6 | ≤8 | ≤80 |
| Resistivity (μΩ·cm) | 45–55 | 45–55 | 45 |
| Curie Temperature (°C) | 520–560 | 500–550 | 740 |
| Magnetostriction (×10⁻⁶) | ≤2.0 | ≤4.0 | ≥10 |
| Magnetic Loss (W/kg, 1.5T, 50Hz) | ≤0.6 | ≤0.8 | ≤2.0 |
| Thermal Expansion (×10⁻⁶/K) | 8.5–9.0 | 8.5–9.5 | 12–14 |
| Recommended Annealing Temp (°C) | 1100–1200 | 1100–1200 | 800–900 |
This comparison clearly shows that 4J52 offers superior permeability and lower magnetostriction compared to similar materials, making it the preferred choice for highly sensitive magnetic amplifiers and sensors.
DLX Company Advantage
DLX Alloy’s production of 4J52 plates is built on precision metallurgy and strict quality assurance. We employ advanced vacuum melting, fine cold rolling, and hydrogen atmosphere annealing processes to control microstructure and magnetic domain alignment.
Each batch is rigorously inspected using B-H curve analysis, eddy current testing, and magnetic hysteresis characterization to ensure the product meets both domestic and international standards.
Our factory uses high-precision rolling mills and surface polishing lines, achieving dimensional tolerances within ±0.01 mm — essential for micro magnetic circuit applications.
DLX also provides customized material processing, including surface treatment, slotting, and fine cutting services. Our engineering team works directly with clients to tailor permeability, coercivity, and stress-relief parameters according to their specific design needs.
With ongoing cooperation with independent research institutions and laboratories, DLX’s 4J52 products have been tested for long-term magnetic stability, mechanical reliability, and corrosion resistance, offering data-backed confidence for customers in precision electronics, aerospace, and defense industries.
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 4J52 different from other nickel-iron alloys?
Its higher nickel content provides improved magnetic stability and lower magnetostriction, ideal for precision magnetic devices.
2. Can 4J52 be used in high-frequency circuits?
Yes. After hydrogen annealing, it exhibits stable permeability and low loss at both low and medium frequencies.
3. How does DLX ensure magnetic consistency?
Each batch undergoes strict vacuum melting, magnetic domain refinement, and full third-party testing to ensure uniform performance.
4. What are the mechanical characteristics of 4J52?
It has excellent ductility and machinability, allowing it to be rolled or stamped into complex shapes without magnetic degradation.
5. Is 4J52 corrosion resistant?
Yes, its nickel-rich composition offers better oxidation and corrosion resistance than typical iron alloys.
6. What thicknesses are available from DLX?
We offer 4J52 plates from 0.1 mm to 10 mm, with custom dimensions available upon request.
7. Is 4J52 suitable for aerospace or defense applications?
Absolutely. Its stability under varying temperatures and magnetic fields makes it ideal for navigation and control systems.
8. Does DLX provide certification and testing data?
Yes. DLX offers material certificates, SGS and TUV test reports, and full traceability documentation for export and industrial use.
The use of high-precision magnetic materials like 4J52 continues to expand across multiple industries. As automation, aerospace, and semiconductor manufacturing demand tighter performance tolerances, 4J52 has become a go-to material for magnetic amplifiers, precision sensors, and feedback control systems.
At DLX Alloy, our mission is to provide clients with materials that not only meet but exceed technical expectations. Through process refinement, independent testing, and years of practical manufacturing experience, we ensure that every 4J52 plate offers consistent, repeatable magnetic performance.
Our products have been integrated into numerous global production systems, serving customers in electronics, aerospace, and instrumentation sectors — helping them achieve better efficiency and reliability through advanced magnetic material engineering.
