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DOMADIA™ Perm 77 (FeNi77CuMo) – The Magnetic Marvel in Precision Electronics
Introduction
What if the key to eliminating signal noise, boosting transformer efficiency, and shielding the world’s most sensitive electronics wasn’t software or circuitry—but a silent, hidden metal known as DOMADIA™ Perm 77 permalloy?
Beneath the casing of MRI scanners, stealth drones, and quantum labs lies a magnetic secret. It isn’t flashy. It doesn’t spark or buzz. Yet, it shapes the reliability of entire industries.
Introducing a soft magnetic nickel-iron alloy enhanced with copper and molybdenum—DOMADIA™ Perm 77 (FeNi77CuMo). This advanced material is engineered with atomic-level precision to control magnetic fields, suppress interference, and maximize signal integrity.
In a world increasingly overwhelmed by electromagnetic chaos, this unsung hero restores order, efficiency, and quiet performance.
Chemical Composition of DOMADIA™ Perm 77 (FeNi77CuMo)
Designed for high magnetic responsiveness, DOMADIA™ Perm 77 features a carefully balanced chemistry:
This composition is specially tailored to offer very high initial and maximum permeability, ideal for low-frequency applications where magnetic responsiveness is critical.
Applications of DOMADIA™ Perm 77
Because of its unique soft magnetic behavior, DOMADIA™ Perm 77 excels across multiple industries. Some of its most common applications include:
- Transformers & Chokes – Reducing eddy current and hysteresis losses.
- Electromagnetic Shields (EMI/RFI) – Providing high attenuation across broad frequency ranges.
- Magnetic Field Sensors & Detectors – Enabling sensitive, low-noise signal detection.
- Telecommunication & Medical Devices – Ensuring signal integrity and safe operation.
- Recording Heads & Magnetometers – For high-resolution, low-distortion data capture.
Moreover, it performs consistently even under temperature or magnetic stress.
Standards & Designations
DOMADIA™ Perm 77 complies with several industry-recognized standards:
- DIN 17745 / DIN 17405 / DIN IEC 740-2
- Material Number: DIN – 2.453
- UNS: Not yet identified – if you know, share it with us in the comments below!
As a result, engineers can trust its quality and consistency for demanding projects.
Magnetic & Physical Properties
| Property | Value |
|---|---|
| Relative Permeability (μr) | Up to 80,000 (annealed) |
| Initial Permeability (μi) | > 20,000 |
| Saturation Induction (Bs) | ~0.8 Tesla |
| Coercivity (Hc) | < 1 A/m (typically 0.5 A/m) |
| Core Loss at 50 Hz | Very Low |
| Curie Temperature | ~450°C |
| Electrical Resistivity | ~0.6 µΩ·m |
| Density | ~8.7 g/cm³ |
| Thermal Expansion Coefficient | ~13 × 10⁻⁶ /°C |
| Melting Point | Approx. 1450°C |
Performance Highlights:
- Extremely low coercivity
- High permeability from initial magnetization
- Excellent magnetic stability across temperatures
- Consistently soft magnetic behavior under stress
Therefore, it’s a go-to material for electromagnetic precision.
Technical Specifications – DOMADIA™ Perm 77 (FeNi77CuMo)
| Parameter | Specification |
|---|---|
| Material Name | DOMADIA™ Perm 77 |
| Alloy Type | Soft Magnetic Alloy |
| Composition | Fe–Ni–Cu–Mo (approx. 77% Ni, 4.5% Cu, 5% Mo) |
| Standard Designations | DIN 17745 / DIN 17405 / DIN IEC 740-2 |
| DIN Material Number | 2.453 |
| UNS Number | Would like to know it from you |
All forms are available in annealed and cold-rolled conditions to ensure optimal magnetic and mechanical properties.
Available Shapes
- Foils – Ideal for ultra-thin shielding layers
- Strips – For winding and lamination stacks
- Plates & Sheets – For structural magnetic components
- Bars & Rods – For machined magnetic assemblies
Conclusion
In the modern world, innovation is loud—but performance is often quiet. That’s why DOMADIA™ Perm 77 (FeNi77CuMo) stands out.
While others amplify noise and complexity, this alloy silently stabilizes, shields, and optimizes. It doesn’t appear in product headlines, but it’s present in every signal that’s clear, every measurement that’s precise, and every machine that performs flawlessly.
So, the next time your application demands absolute magnetic control, remember—sometimes, the most powerful component is engineered in metal, not mentioned in specs.
👉 Connect with DOMADIA Metals to bring the magnetic force of the future into your designs.
Explore our full range of precision alloys and engineering materials at https://domadia.net/
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Talk to: Kairav Domadia | Aadil Domadia | Er.Pankaj Domadia | Pragati Sanap | Pooja N N | Shivani Kanojia
