What Are Neodymium Magnets?
Neodymium magnets are permanent magnets made from an alloy of neodymium, iron and boron (Nd₂Fe₁₄B, usually shortened to NdFeB or “neo”). They’re a type of rare earth magnet and the strongest permanent magnets commercially available: a small neodymium disc can hold many times its own weight. Most are nickel plated because the iron-rich alloy rusts easily.
What’s Inside a Neodymium Magnet
Higher-temperature grades replace some neodymium with dysprosium or terbium. Small amounts of cobalt, copper or aluminum fine-tune strength and corrosion resistance.
Key Properties
- Strength (energy product)
- 33 to 56 MGOe
- Common grades
- N35, N42, N48, N52
- Max temperature (standard N grade)
- 80°C (176°F)
- Standard plating
- Nickel-copper-nickel
- Texture
- Hard and brittle, like ceramic
Shapes We Stock
Discs and Cylinders
The most popular shapes. Shop Discs
Blocks and Bars
Rectangular, flat or long. Shop Blocks
Rings and Countersunk
Holes for screws, bolts and pins. Shop Rings
Spheres
Round magnets for building and demos. Shop Spheres
Why Choose Neodymium?
Neodymium magnets pack the most magnetic force into the least space, so you can use a smaller, lighter magnet for the same job. The trade-offs: they need a coating to prevent rust, they’re brittle, and standard grades shouldn’t get hotter than 80°C (176°F). See neodymium vs other magnet types.