In the world of precision electronics, the demand for stable, low-expansion alloys with excellent magnetic performance continues to rise—particularly in electromagnetic control systems, aerospace sensors, and defense applications. At DLX Alloy, we specialize in manufacturing 4J52 Nickel-Iron Alloy Plates with consistently high quality, exceptional stability, and proven reliability. Drawing on years of real production experience, our materials have been supplied to semiconductor equipment manufacturers, sensor developers, and research institutions that require exacting magnetic and mechanical consistency.
4J52 is a nickel-iron controlled expansion alloy, typically containing around 52% nickel and 48% iron. It is engineered for applications requiring precise dimensional control under varying temperatures, while maintaining reliable magnetic properties. The alloy exhibits excellent thermal stability, good magnetic permeability, and low thermal expansion that closely matches that of glass and ceramics.
DLX’s 4J52 plates are produced using vacuum induction melting and refined by hot rolling and precision annealing. Each production batch undergoes magnetic permeability, thermal expansion, and grain structure testing to ensure material uniformity.
|
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 |
- |
|
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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Electromagnetic control systems: Used in precision coils, magnetic amplifiers, and electromagnetic actuators requiring consistent performance under thermal and magnetic stress.
-
Sensors and transducers: Ideal for magnetic sensors, Hall effect components, and current measuring devices.
-
Relays and precision magnetic cores: Offers high magnetic uniformity for sensitive control elements.
-
Defense and aerospace electronics: Suitable for devices requiring dimensional and magnetic stability over wide temperature ranges.
Our clients often select 4J52 when they require an alloy that balances controlled expansion with strong magnetic response—especially in instruments where even micro-level deformation can impact signal accuracy.
As global industries move toward smart automation and energy-efficient control systems, the role of high-stability magnetic alloys has expanded significantly. 4J52’s combination of magnetic consistency and low expansion makes it a preferred material in next-generation actuators, sensor cores, and electromagnetic control components.
The semiconductor and aerospace sectors, in particular, are prioritizing materials that can ensure zero drift in magnetic fields under dynamic temperature conditions. With increased demand for precision motion control in robotics, automotive electrification, and industrial automation, DLX’s 4J52 plates are increasingly being integrated into sensor-driven systems that require uncompromising stability.
Third-party material validation agencies, including SGS and TUV, have confirmed DLX 4J52’s compliance with international standards such as ASTM F30 and GB/T 15002, further enhancing our credibility among global clients.
| Property | 4J52 Alloy Plate (DLX) | 4J50 Alloy Plate | 4J42 Alloy Plate |
|---|---|---|---|
| Nickel Content (%) | 51–53 | 49–51 | 41–43 |
| Density (g/cm³) | 8.2 | 8.15 | 8.12 |
| Coefficient of Thermal Expansion (20–200°C, ×10⁻⁶/°C) | 6.0–7.0 | 8.0–9.0 | 5.0–6.0 |
| Curie Temperature (°C) | ~420 | ~450 | ~360 |
| Magnetic Permeability (μ max) | High | Very High | Medium |
| Electrical Resistivity (μΩ·cm) | 45–55 | 50–60 | 40–50 |
| Thermal Stability | Excellent | Good | Very Good |
| Processing Difficulty | Moderate | Moderate | Easy |
4J52’s balance between controlled expansion and magnetic performance places it between 4J42 (optimized for sealing) and 4J50 (optimized for permeability). This makes it ideal for electromagnetic stability applications where both magnetic uniformity and structural precision matter.
Why DLX Alloy
At DLX Alloy, we emphasize process consistency, traceability, and practical usability. Our engineers have refined 4J52 plate production to achieve tighter control over microstructure and residual stress—factors often overlooked by general manufacturers.
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Vacuum smelting and hydrogen annealing: Ensures purity and grain uniformity for stable magnetic properties.
-
Tight dimensional tolerance (±0.02mm): Critical for precise electromagnetic component assembly.
-
Third-party validation and internal lab certification: Each batch undergoes physical, chemical, and magnetic testing before shipment.
-
Custom annealing and cutting service: Enables customers to directly integrate DLX plates into magnetic core or control assemblies without secondary machining loss.
Many of our customers in precision control industries have confirmed that DLX 4J52 plates significantly reduce magnetic drift and core loss during high-frequency operation, improving the long-term accuracy of their electromagnetic 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.
Client Visits
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We support all kinds of testing:
FAQs:
1. What is the main difference between 4J52 and 4J50?
4J52 offers slightly lower magnetic permeability but better thermal stability and expansion control, making it more suitable for electromagnetic control components.
2. Can 4J52 operate in high-temperature magnetic environments?
Yes. It maintains stable magnetic properties up to around 420°C, which is ideal for most electromagnetic and sensor systems.
3. How does DLX ensure dimensional consistency?
Each batch undergoes precision cold rolling, annealing, and flatness calibration using automatic optical systems.
4. Is 4J52 easy to machine or weld?
Yes. It can be easily machined, stamped, and welded using inert gas protection methods.
5. Does 4J52 require special heat treatment before use?
For most magnetic applications, hydrogen annealing is recommended to restore maximum permeability and stability.
6. Is DLX 4J52 compliant with international material standards?
Yes. DLX 4J52 meets GB/T 15002, ASTM F30, and related controlled expansion alloy standards.
7. Can DLX provide customized thickness and width options?
Absolutely. We support thicknesses from 0.05mm to 10mm and widths up to 1000mm, with customized surface finish options.
8. What industries benefit most from 4J52 plates?
Electromagnetic control systems, aerospace sensors, precision transformers, and magnetic amplifiers are the primary beneficiaries.
Industry Validation
DLX 4J52 plates have been tested and approved by several independent labs for thermal expansion, permeability, and structural reliability. In collaboration with universities and research institutions, our material data aligns closely with real-world system performance, ensuring that what customers receive matches what their engineers design.
We’ve supplied 4J52 for magnetic control modules in intelligent robotics, high-precision optical equipment, and aerospace systems—where consistency under temperature cycles is non-negotiable.
The 4J52 Nickel-Iron Alloy Plate continues to be a critical material in high-precision electromagnetic control and sensing technologies. As automation and aerospace industries evolve, the demand for alloys with balanced magnetic and expansion control grows stronger.
DLX’s long-standing expertise in alloy metallurgy ensures that every 4J52 plate leaving our facility performs with the same stability and reliability our customers have come to expect. With advanced testing, third-party certification, and real-world feedback, DLX remains a trusted partner for industries that cannot compromise on precision.
