Free tool

Magnet Material & Grade Selector

Answer four questions to get a first recommendation — NdFeB, SmCo or ferrite, and which grade. No sign-up required.

Maximum working temperature°C

Environment

Dry, indoorHumid / condensationOutdoor, salt spray or chemicals

What matters most

Maximum strengthLowest costTemperature stability / precision

Space is tight (magnet must be small)

Best match

Sintered NdFeB (neodymium)

Suggested grades: 42M · 35M

Highest energy product: smallest magnet for a given force.
Corrodes when bare — must be coated.
Coating: Ni-Cu-Ni
N52 · N48 · N42 (rated 80 °C, 0 °C margin) also cover this temperature, below the 10 °C margin we recommend — a cheaper choice if your working temperature is firm.

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Samarium cobalt (SmCo)

Suggested grades: SMG-32H (Sm₂Co₁₇) · SMG-28H (Sm₂Co₁₇) · SMG-24H (Sm₂Co₁₇)

Smallest change of strength with temperature; resists demagnetisation.
Good corrosion resistance; usually needs no coating.

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Ferrite (ceramic)

Suggested grades: Y40 · Y35 · Y33H

Lowest material cost; ideal for large volumes.
Good corrosion resistance; usually needs no coating.

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A rule-based first pass from catalogue data. Final selection depends on the magnetic circuit, working point and cost — our engineers can check it for free.