Epoxy-Coated Iron Powder (Epoxy@Fe)
Epoxy@Fe powder individually insulates iron particles with a thin phosphate/epoxy coating, enabling pressed soft magnetic composite cores with isotropic 3-D magnetic flux paths and low eddy-current loss that laminated steel cannot achieve.
<1 wt% coatingCoating Content
45-212 µmParticle Size Range
Custom Made-to-OrderGrade, Size & Quantity
WorldwideExport Shipping
Epoxy-Coated Iron Powder — Grades & Specifications
Epoxy-Coated Iron Powder (Epoxy@Fe) powder is supplied across a range of grades, particle sizes and coating ratios. The options below are typical; specify your target values in the request form and we will confirm availability, lead time and pricing.
| Material | Epoxy-Coated Iron Powder (Epoxy@Fe) |
|---|---|
| Category | Polymer-Coated Powder |
| Core material | Iron (CAS 7439-89-6) |
| Coating / shell material | Epoxy/phosphate insulation layer |
| Coating content | Thin insulation layer, generally well under 1 wt% total coating — typically a proprietary phosphate base layer with a thin organic (epoxy/phenolic) topcoat |
| Particle size | Base water-atomized iron powder spans roughly 45-212 um; soft magnetic composite grades are offered as large (#40 mesh), medium (#100 mesh) and fine (#200 mesh) cuts |
| Morphology | Irregular/near-spherical water-atomized particles, each individually insulated rather than agglomerated |
| Appearance | Gray-black free-flowing metallic powder |
| Electrical Resistivity | Compacted resistivity of the insulated material ranges roughly 70-700 microOhm-m depending on grade and compaction pressure (up to several thousand on the highest-resistivity grades) versus bare iron, which would be far more electrically conductive and lossy from eddy currents |
| Typical applications | Electric Motor Stator/Rotor Cores, High-Frequency Inductor Cores, EV Traction Motor Components, Solenoid & Actuator Cores |
Applications by Industry
Electric Motor Stator/Rotor CoresEnables 3D magnetic flux paths not possible with laminated steel, reducing losses in compact motors.
High-Frequency Inductor CoresInsulation suppresses eddy currents, allowing use at frequencies laminations can't reach efficiently.
EV Traction Motor ComponentsLightweight, near-net-shape pressed cores reduce weight and machining in automotive drivetrains.
Solenoid & Actuator CoresIsotropic magnetic properties support complex 3D actuator geometries in a single pressed part.
Power Transformer & Choke CoresLow core loss at line and switching frequencies for compact power electronics.
Variable Valve Timing ActuatorsCompressible insulated iron powder used in automotive VVT actuator components.
Particle Size & Mesh Conversion
Reference for converting between US mesh and microns/millimetres. Figures are nominal sieve openings and may vary slightly by standard.
| Mesh (US) | Micron (µm) | mm | Inch | Remarks |
|---|---|---|---|---|
| 3 | 6730 | 6.730 | 0.2650 | |
| 4 | 4760 | 4.760 | 0.1870 | |
| 5 | 4000 | 4.000 | 0.1570 | |
| 6 | 3360 | 3.360 | 0.1320 | |
| 7 | 2830 | 2.830 | 0.1110 | |
| 8 | 2380 | 2.380 | 0.0937 | |
| 10 | 2000 | 2.000 | 0.0787 | |
| 12 | 1680 | 1.680 | 0.0661 | |
| 14 | 1410 | 1.410 | 0.0555 | |
| 16 | 1190 | 1.190 | 0.0469 | |
| 18 | 1000 | 1.000 | 0.0394 | |
| 20 | 841 | 0.841 | 0.0331 | |
| 25 | 707 | 0.707 | 0.0278 | |
| 30 | 595 | 0.595 | 0.0234 | |
| 35 | 500 | 0.500 | 0.0197 | |
| 40 | 420 | 0.420 | 0.0165 | |
| 45 | 354 | 0.354 | 0.0138 | |
| 50 | 297 | 0.297 | 0.0117 | |
| 60 | 250 | 0.250 | 0.0098 | |
| 70 | 210 | 0.210 | 0.0083 | |
| 80 | 177 | 0.177 | 0.0070 | |
| 100 | 149 | 0.149 | 0.0059 | |
| 120 | 125 | 0.125 | 0.0049 | |
| 140 | 105 | 0.105 | 0.0041 | |
| — | 100 | 0.100 | 0.0039 | Sand |
| 170 | 88 | 0.088 | 0.0035 | |
| 200 | 74 | 0.074 | 0.0029 | |
| — | 70 | 0.070 | 0.0027 | |
| 230 | 63 | 0.063 | 0.0024 | Human hair |
| — | 55 | 0.055 | 0.00217 | |
| 270 | 53 | 0.053 | 0.0021 | |
| — | 50 | 0.050 | 0.00197 | |
| 325 | 44 | 0.044 | 0.0017 | |
| — | 40 | 0.040 | 0.00157 | |
| 400 | 37 | 0.037 | 0.0015 | |
| 550 | 25 | 0.025 | 0.00099 | |
| 625 | 20 | 0.020 | 0.00079 | |
| 1200 | 12 | 0.012 | 0.0005 | |
| 1250 | 10 | 0.010 | 0.000394 | |
| — | 7 | 0.007 | 0.000276 | |
| 2500 | 5 | 0.005 | 0.000197 | |
| 4800 | 3 | 0.003 | 0.000118 | |
| 5000 | 2.5 | 0.0025 | 0.000099 | Bacteria (approx.) |
| 12000 | 1 | 0.001 | 0.0000394 |
Information Required for Quotation
- Grade or type
- Particle size (micron or mesh)
- Coating content / core-shell ratio
- Quantity
- Application environment
- Required delivery country
Lead time depends on grade, particle size, quantity and processing requirements. Export availability can be reviewed based on destination country and material type. A Certificate of Analysis can be provided on request.
Request a Quote or Custom Order
Tell us your grade, particle size and quantity. We typically reply within one business day.
Frequently Asked Questions
What is the coating content of Epoxy-Coated Iron Powder?
Thin insulation layer, generally well under 1 wt% total coating — typically a proprietary phosphate base layer with a thin organic (epoxy/phenolic) topcoat Other coating ratios can be reviewed on request depending on your application and quantity.
What particle sizes can you supply?
Base water-atomized iron powder spans roughly 45-212 um; soft magnetic composite grades are offered as large (#40 mesh), medium (#100 mesh) and fine (#200 mesh) cuts Mesh-based requirements are also accepted; a mesh-to-micron conversion reference is provided on the page.
Can Epoxy-Coated Iron Powder be made to custom specifications?
Yes. Epoxy-Coated Iron Powder is produced to order — core/shell ratio, particle size, morphology and packaging can be customized to your specification. Select “Custom Order” in the request form and provide your target values.
What is the minimum order quantity (MOQ)?
Order quantity is flexible and small quantities and prototype requests are welcome. Please state your required quantity in the form for an accurate quotation.
Can you export and ship Epoxy-Coated Iron Powder internationally?
Yes, export inquiries are welcome. Availability and shipping are reviewed based on destination country, grade and quantity.
Do you provide a Certificate of Analysis (COA) or technical data?
A Certificate of Analysis and technical data can be provided on request for supplied lots.
Related Products
Request a Quote for Epoxy-Coated Iron Powder
Send us your grade, particle size, quantity and application. We will review availability, quotation and lead time. Small quantities, prototypes and custom made-to-order specifications are welcome.