NdFeB grade guide
N35, N42, and N52 are often treated like a simple strength ladder. In real sourcing, grade also needs to be checked with size, coating, temperature, magnetization direction, and the way the part is used.
A higher number usually means higher maximum energy product, but it does not automatically mean the best choice. N52 may be unnecessary if N35 or N42 already meets the force target and cost target.
For a first quote, tell CIYI the size, pull force target, use, temperature, coating, and quantity. If you do not know the grade, we can discuss a practical starting point.
Letters such as M, H, SH, UH, and EH usually point to higher temperature resistance. They can change cost and availability, so the working temperature should be discussed before sampling.
Grade reference
This is a sourcing guide, not a final engineering approval sheet. Final grade should be checked against the product design.
| Grade group | Typical sourcing use | What to check |
|---|---|---|
| N35-N42 | General discs, blocks, holders, packaging magnets, and many OEM parts. | Size, coating, pull force target, and cost target. |
| N45-N52 | Compact designs that need stronger force in less space. | Whether the extra force is needed, plus brittleness and handling. |
| M/H/SH/UH/EH series | Higher temperature or more demanding assemblies. | Working temperature, coating, tolerance, and order quantity. |
Quote checklist
Many buyers do not know the grade at the first inquiry. That is workable.
Grade FAQ
These answers keep the first discussion practical.
No. N52 is stronger, but it may not be needed. If N35 or N42 works, it can be easier to source and better for cost.
Send the size, use, and force target. CIYI can discuss a reasonable grade range before sampling.
Coating is a separate choice. Nickel, zinc, epoxy, and other coatings are chosen by surface, corrosion, color, and handling needs.
They usually relate to higher temperature resistance. The exact choice should be checked against working temperature and product design.
Yes. If both cost and force matter, send the target use and quantity. We can review practical options.
