Do you know that sintered neodymium iron boron magnets are evaluated based on the maximum magnetic energy product. Take a look at our neodymium magnet specifications page and you will find a rule that the maximum value of grade N35 (BH) is 33-36MGOe in the middle. Therefore, higher values indicate stronger magnets, ranging from N35 to N55.

The letter after the number represents the maximum operating temperature (usually in Celsius), ranging from M (100 ℃), H (120 ℃), SH (150 ℃), UH (180 ℃), EH200 ℃) to AH (220 ℃). If there is no letter like N42 after it, the maximum operating temperature is 80 ℃.

What coatings do neodymium iron boron magnets have?

Due to the presence of iron element in sintered neodymium iron boron magnets, the coating is a very important part of neodymium magnets. Although we can offer multiple electroplating options, nickel is still the most common and usually the preferred.

Nickel plated magnets actually consist of three layers of nickel plating, copper plating, and nickel plating. This three-layer electroplating makes our sintered neodymium iron boron magnets more durable than single-layer nickel plated magnets. Other coating options include zinc, tin, and rubber, epoxy resin, silver, and gold.