Automotive magnetic components
Powder grade, bonding process and required magnetic properties.
Magnetic Powders — For Bonded Magnets and Beyond
High-quality NdFeB and SmCo powders for bonded magnet manufacturing, injection molding compounds, 3D printing feedstock, and specialty applications. Full particle size distribution and magnetic property certification.
For Procurement
MOQ, lead time, packaging and commercial terms — go straight to a quotation.
Request a Quote →For Engineering
Grades, drawings, process data and design support for your DFM review.
Specifications & CoA Samples →For Quality / SQE
Certificates, inspection planning, traceability and PPAP / FAI support per project.
Certificates & Traceability →Product Range
Magnetic Powder — Product Gallery
Representative product forms for reference. Final geometry, material and finish are agreed for each project.
Why Our Powders?
Consistent powder means consistent bonded magnets — and consistent magnets mean reliable products for your customers.
- ✓Certified magnetic properties — every lot tested for Br, iHc, and (BH)max after standard press-and-sinter or bonded processing
- ✓Controlled particle size — laser diffraction particle size analysis on every lot — D10/D50/D90 certified
- ✓Oxidation protection — passivated and packaged under inert gas for extended shelf life
- ✓Application-matched — powder optimized for compression bonding, injection molding, or 3D printing processes
Applications
| Application | Typical Spec | Why This Material |
|---|---|---|
| Bonded NdFeB Magnets | Isotropic melt-spun powder | Compression or injection bonded magnets for office equipment and automotive |
| Injection Molding Compounds | Powder + PA12/PPS pellets | Complex net-shape magnetized parts |
| Additive Manufacturing | Binder jetting / laser sintering grade | Magnetic 3D printing feedstock |
| Microwave Absorbers | Carbonyl iron + ferrite powders | EMI suppression and radar absorbing materials |
| Magnetic Paints & Coatings | Fine ferrite and NdFeB powder | Specialty coatings with magnetic properties |
Powder Specifications
Full powder datasheet available for download.
| Powder Type | Process | Particle Size (D50) | Bonded (BH)max | Best For | MOQ |
|---|---|---|---|---|---|
| Isotropic NdFeB | Melt-spun + crushed | 50–200μm | 4–8 MGOe | Bonded magnets, general | 50 kg |
| Fine Isotropic NdFeB | Melt-spun + jet milled | 5–20μm | 4–7 MGOe | Injection molding | 50 kg |
| Anisotropic NdFeB | HDDR process | 80–300μm | 10–14 MGOe | High-performance bonded | 100 kg |
| SmCo Powder | Gas atomized + crushed | 50–150μm | 8–12 MGOe | High-temp bonded magnets | 20 kg |
| Ferrite Powder | Solid state reaction | 0.5–5μm | 1–3 MGOe (bonded) | Flexible magnets, injection | 100 kg |
Isotropic vs Anisotropic Powder
The magnetic orientation of individual particles determines what you can do with the powder:
- ✓Isotropic — particles randomly oriented — magnets made from it can be magnetized in any direction; lower energy product (4–8 MGOe); the standard for most bonded applications
- ✓Anisotropic (HDDR) — particles crystallographically aligned — 1.5–2× stronger when magnetized along the alignment axis but requires field-oriented pressing or molding
- ✓Our recommendation — start with isotropic; move to anisotropic only if your application needs the extra performance and can tolerate the process constraints
Handling & Storage
Magnetic powders are reactive — handle and store properly:
- ✓Oxidation — NdFeB powder is pyrophoric — fine powder (<20μm) can ignite spontaneously in air; always handle under inert atmosphere or with passivated powder
- ✓Storage — sealed containers under argon or nitrogen; 6–12 months shelf life for passivated powder
- ✓Safety — wear respiratory protection — NdFeB dust is harmful if inhaled; consult our MSDS before handling
- ✓We can help — if you lack powder-handling infrastructure, we also supply finished bonded magnets from our own powder — one less thing to manage
Complete Technical Data
Full reference tables for Magnetic Powders — migrated from our production specification library. Click any row's PDF to download the grade datasheet.
Data table 1
| Grade | Br (mT) | Hcb (kA/m) | Hcj (kA/m) | (BH)max (kJ/m³) | D50 (μm) | Application |
|---|---|---|---|---|---|---|
| SFP-1.5 | 230-250 | 160-180 | 240-280 | 9.5-11.5 | 1.2-1.8 | Injection molding (PA6/PA12 binder) |
| SFP-2.0 | 240-260 | 170-195 | 260-310 | 10.5-12.5 | 1.5-2.2 | Compression bonded (epoxy binder) |
| SFP-3.0 | 250-270 | 185-210 | 280-340 | 12.0-14.5 | 0.8-1.5 | Calendered flexible sheet/strip |
| SFP-A | 225-245 | 155-175 | 220-265 | 9.0-10.5 | 1.0-1.6 | Anisotropic general purpose |
Data table 2
| Grade | Material | Br (mT) | Hcb (kA/m) | Hcj (kA/m) | (BH)max (kJ/m³) | Shrinkage (%) | Coarse Powder (μm) | Fine Powder (μm) |
|---|---|---|---|---|---|---|---|---|
| SFP-W4 | SrFe₁₂O₁₉ | 385-395 | 215-231 | 223-255 | 27.9-31.1 | 12.0-14.0 | 3-6 | 0.80-0.90 |
| SFP-W5 | SrFe₁₂O₁₉ | 400-410 | 223-239 | 223-255 | 30.3-33.5 | 12.0-14.5 | 3-6 | 0.68-0.80 |
| SFP-W6 | SrFe₁₂O₁₉ | 405-415 | 255-271 | 263-295 | 30.3-31.9 | 11.0-13.0 | 2-5 | 0.65-0.75 |
| SFP-W9.1 | SrFe₁₂O₁₉ | 440±10 | 262.5±12 | 286.5±12 | 36.0±1.6 | 11.0±1 | — | 0.6±0.02 |
| SFP-W9.2 | SrFe₁₂O₁₉ | 430±10 | 318.5±12 | 358.3±12 | 35.0±1.6 | 11.0±1 | — | 0.6±0.02 |
| SFP-W9.3 | SrFe₁₂O₁₉ | 420±10 | 318.5±12 | 397.9±12 | 33.5±1.6 | 11.0±1 | — | 0.6±0.02 |
Data table 3
| Grade | Material | Br ∥ / ⊥ (mT) | Hcb ∥ / ⊥ (kA/m) | Hcj ∥ / ⊥ (kA/m) | (BH)max ∥ / ⊥ (kJ/m³) | Shrinkage (%) | Fine Powder (μm) |
|---|---|---|---|---|---|---|---|
| SFP-D1 | BaFe₁₂O₁₉ | 200-230 / 185-205 | 129-137 / 115-125 | 199-231 / 199-231 | 7.6-8.4 / 5.6-6.4 | 14.0-16.0 | 0.8-1.0 |
| SFP-D1R | BaFe₁₂O₁₉ | 210-220 / 220-240 | 127-143 / 132-148 | 246-278 / 246-278 | 6.8-8.4 / 8.4-9.2 | 13.5-15.5 | 0.8-1.0 |
| SFP-D1A | BaFe₁₂O₁₉ | 230-240 / 195-205 | 143-151 / 123-131 | 239-271 / 239-271 | 8.4-9.2 / 5.6-6.4 | 14.0-16.0 | 0.8-1.0 |
Data table 4
| Grade | Material | Br (mT) | Hcb (kA/m) | Hcj (kA/m) | (BH)max (kJ/m³) | Shrinkage (%) | Fine Powder (μm) |
|---|---|---|---|---|---|---|---|
| SFP-D2.4 | SrFe₁₂O₁₉ | 350-370 | 207-239 | 223-255 | 22.4-25.6 | 14.5-16.5 | 0.8-0.9 |
| SFP-D2.6 | SrFe₁₂O₁₉ | ≥372 | ≥227 | ≥235 | ≥24.7 | 13.0-15.0 | 0.75-0.85 |
| SFP-D2.6H | SrFe₁₂O₁₉ | 370-380 | 245-265 | 255-279 | 23.9-25.5 | 13.0-15.0 | 0.75-0.85 |
| SFP-D2.7H | SrFe₁₂O₁₉ | ≥372 | ≥255 | ≥280 | ≥24.7 | 13.0-15.0 | 0.75-0.85 |
Production & Supply Planning
Magnetic Powder: A Defined Route to Repeat Orders
Agree the process, acceptance criteria and shipment plan before production starts. The quotation identifies the producing site and the controls required for your part.
Confirm the manufacturing route
Select the chemistry, powder form, particle distribution and handling conditions for the downstream process.
Approve the inspection plan
Agree magnetic properties, particle-size limits, chemical checks and certificate-of-analysis requirements.
Qualify before repeat supply
Define sample approval, drawing revision and lot identification. Agree how material, process or site changes will be reviewed before implementation.
Plan releases and delivery
Confirm order quantities, capacity allocation, packaging and shipping terms against your forecast. Delivery dates and any buffer-stock arrangement belong in the agreed supply plan.
Application Engineering
Where magnetic powder materials Fit
Typical component uses and the requirements to discuss before quotation. Suitability depends on your design and validation criteria.
Inductors and electronic components
Particle distribution and the electrical or magnetic function of the component.
Industrial motors and automation
Compaction or molding route, density and final magnetization.
Power conversion and energy systems
Material chemistry, temperature and project-specific magnetic loss targets.
Frequently Asked Questions
Can you supply powder or only finished magnets?
Both. Most of our powder production feeds our own bonded magnet lines, but we supply powder directly to qualified customers with appropriate handling capability. Tell us your application — we'll recommend whether powder supply or finished magnets better serve you.
What's the difference between melt-spun and HDDR powder?
Melt-spun (rapidly solidified) powder is isotropic — good for general bonded magnets. HDDR (hydrogenation-disproportionation-desorption-recombination) powder is anisotropic — 1.5–2× stronger but must be magnetized along its alignment axis. HDDR costs 30–50% more and requires field-orientation in your process.
Do you provide MSDS and safety documentation?
Yes — MSDS, transport classifications (UN and IATA where applicable), and handling guidelines accompany every powder shipment. NdFeB powder is classified as flammable solid for fine grades — we ship with appropriate declarations and packaging.
What particle size do I need for injection molding?
Injection molding requires fine powder (D50 5–20μm) to flow through nozzles and fill thin-wall molds without segregating from the polymer carrier. Coarser powder (D50 >50μm) works for compression bonding where the powder is mixed with minimal binder and pressed in a die.
Traceability & Packaging
Lot Traceability & CoA
Certificate of Analysis with every lot — particle size distribution, magnetic properties, oxygen and moisture content measured per the agreed methods.
Packaging
Sealed containers with moisture barrier; inert-gas packing for reactive powders; label includes lot number, production date and storage class.
Handling & Storage Guidance
Storage-life and handling documentation supplied so your process maintains powder quality from dock to press.
Have a Material Specification?
Send your spec — particle size distribution, purity, magnetic properties. CoA with every lot.