About Neodymium Magnets

A side-by-side comparison of neodymium, samarium cobalt, alnico, ferrite and flexible magnets.

Field lines show where a magnet's field points and how strong it is. They run from north to south outside the magnet and never cross.

It depends on the grade. 400-series stainless is magnetic; common 300-series grades like 304 and 316 mostly aren't.

Standard nickel is electroplated. Electroless nickel is deposited chemically for a more uniform, more corrosion-resistant layer.

The poles are equally strong and differ only in the direction of the field. Opposite poles attract and like poles repel.