Flexible SmFeN Rubber Magnet
Flexible SmFeN Magnet Sheets, Strips and Custom Parts
- Material: Flexible SmFeN Rubber Magnet
- Available Grades: MGT-RS2, MGT-RS3 and MGT-RS4
- Color: Silver or silver gray
- Coating: UV, PVC or PET
- Thickness: 0.1 mm to 10 mm
- Length: 1 mm to 1000 mm or roll form
- Surface Magnetic Flux Density: 500 to 1700 G
- Processing: Cutting, bending and moulding
- Material Options: Isotropic or anisotropic
- Maximum Operating Temperature: 80°C
Flexible SmFeN Magnet Overview
A flexible SmFeN magnet is a high-performance rubber magnet made with samarium-iron-nitrogen magnetic material. It is designed for applications that need more magnetic performance than a conventional ferrite rubber magnet while retaining the flexibility, corrosion resistance and processing advantages of a flexible magnet. Qingdao Magnet supplies Flexible SmFeN in sheets, strips, rolls and custom-cut parts for industrial applications.
Our Flexible SmFeN material is available in three grades: MGT-RS2, MGT-RS3 and MGT-RS4. Depending on grade, remanence (Br) ranges from 3000 ± 500 G to 4300 ± 500 G, and maximum energy product ranges from 2 ± 0.5 MGOe to 4 ± 0.5 MGOe. The current specification lists a maximum operating temperature of 80°C. Final magnetic performance also depends on material grade, product thickness, magnetizing pattern and the customer’s assembly design.
Why Choose a Flexible SmFeN Rubber Magnet?
- Balanced magnetic performance: positioned between standard ferrite flexible magnets and NdFeB flexible magnets for projects that need a practical performance-to-cost balance.
- Flexible processing: available for cutting, bending and moulding into sheets, strips, rings and application-specific shapes.
- Corrosion-resistant material: suitable for designs where the corrosion sensitivity of NdFeB-based flexible material may be a concern.
- Multiple surface options: UV coating, PVC or PET coating can be selected according to the required surface and application.
- Custom magnetic design: isotropic or anisotropic material and application-specific magnetizing options can be discussed with our engineering team.
Flexible SmFeN vs. Other Flexible Magnets
| Material | Relative magnetic performance | Key characteristic | Typical selection reason |
|---|---|---|---|
| Ferrite rubber magnet | Standard | Cost-effective and corrosion resistant | General flexible magnetic sheets, signs and simple holding applications |
| Flexible SmFeN magnet | Higher than ferrite and lower than NdFeB | Balanced performance, flexibility and corrosion resistance | Industrial applications requiring stronger performance than ferrite |
| Flexible NdFeB magnet | Highest of the three | High magnetic output with additional corrosion considerations | Compact designs where maximum magnetic performance is the priority |
The best material cannot be selected by magnetic strength alone. Thickness, working air gap, target surface, operating temperature, coating and magnetizing direction all affect the final result. Send us your drawing, sample or required surface magnetic force so that the appropriate flexible magnet material can be evaluated.
Sizes, Coatings and Processing
Flexible SmFeN can be supplied from thin sheets to thicker custom parts. The current product range covers thicknesses from 0.1 mm to 10 mm, lengths from small cut pieces to 1000 mm or roll form, and widths up to approximately 650 mm subject to the agreed specification. Available processing services include cutting, bending and moulding. UV, PVC and PET surface coatings are available for different handling, appearance and environmental requirements.
The detailed tables below show magnetic grades, physical properties and dimensional tolerances. These values are specification references rather than a guarantee for every geometry. Final tolerances and magnetic values should be confirmed on the drawing or delivery specification.
Typical Applications
This flexible magnetic material is used for outdoor advertising displays, medical equipment, household appliances, toys and other industrial products. It can also be considered for flexible magnetic strips, custom magnetic sheets, position-sensing components and assemblies where a rigid sintered magnet is not suitable. Application suitability should be confirmed using the actual working gap, mating material and operating environment.
Flexible SmFeN Magnet FAQ
What is a Flexible SmFeN magnet?
It is a flexible rubber magnet composite that uses SmFeN magnetic material. It offers higher magnetic performance than a conventional ferrite rubber magnet while remaining flexible and easy to process.
Is Flexible SmFeN a type of rubber magnet?
Yes. Flexible SmFeN belongs to the rubber magnet and flexible magnet family. The SmFeN magnetic material provides a different performance range from ferrite-based and NdFeB-based flexible magnets.
What is the maximum operating temperature?
The current Flexible SmFeN specification lists a maximum operating temperature of 80°C. The usable temperature in a finished assembly should be confirmed for the selected grade, dimensions and operating conditions.
Can the material be supplied in custom shapes?
Yes. Available processing includes cutting, bending and moulding. Sheets, strips, rolls and custom parts can be discussed based on your drawing or sample.
How do I select between ferrite, SmFeN and NdFeB flexible magnets?
Selection depends on the required magnetic force, available space, corrosion environment, operating temperature and target cost. See our rubber magnet range or contact us with your technical requirements for material selection support.
Magnetic Properties by Grade
| Material Type | MGT-RS2 | MGT-RS3 | MGT-RS4 | ||
|---|---|---|---|---|---|
| Br | Gs | 3000±500 | 3300±500 | 4300±500 | |
| mT | 300±50 | 330±50 | 430±50 | ||
| Hcb | Oe | 2000±500 | 2600±500 | 3200±500 | |
| kA/m | 159±40 | 207±40 | 255±40 | ||
| Hcj | Oe | 3000±1000 | 5800±1000 | 7800±1000 | |
| kA/m | 239±80 | 462±80 | 621±80 | ||
| （BH）max | MGOe | 2±0.5 | 3±0.5 | 4±0.5 | |
| kJ/m3 | 16±4 | 24±4 | 32±4 | ||
| Flux Irreversible Loss | % | ＜5 | ＜5 | ＜5 | |
| Temperature Coefficient of Br（αBr） | %/℃ | -0.11 | -0.11 | -0.11 | |
| Max Operating Temp | ℃ | 80 | 80 | 80 | |
Physical Properties of the Rubber Magnet
| Density | g/cm3 | 4-4.8 | 4.5-5 | 4.8-5.3 | |
|---|---|---|---|---|---|
| Hardess | Shore D | 30-70 | 30-70 | 30-70 | |
| Tensile Strength | Mpa | >3.5 | >3.5 | >3.5 | |
| Elongation | % | 20-90 | 20-90 | 20-90 | |
Custom Sizes and Tolerances
| Thickness（mm） | Range | 0.2-0.3 | 0.4-1.0 | 1.1-2.0 | 2.1-3 | ≥3.1 | Remark:This data is only applicable to the general situation, and the specific product is determined according to the delivery specifications | |||||||
| Tolerance | ±0.03 | ±0.05 | ±0.07 | ±0.1 | ±0.15 | |||||||||
| Width （mm） | Range | 1-30 | 31-100 | 101-200 | 201-400 | 401-450 | ||||||||
| Tolerance | ±0.1 | ±0.15 | ±0.3 | ±0.5 | ±1 | |||||||||
| Length （mm） | Range | 1-30 | 31-100 | 101-200 | 201-400 | ≥401 | ||||||||
| Tolerance | ±0.1 | ±0.15 | ±0.3 | ±0.5 | 1-5 | |||||||||
| Technical information can be change without furture notice | ||||||||||||||
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