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Home - Frequently Asked Questions - Technical Information - Rare Earth Physical Properties

Rare Earth Physical Properties

This table outlines the typical physical properties of a Neodymium magnet. For product specific information it is best to refer to the product page as this table is a general overview.

The team at AMF are proud to service our customers through our state of the art e-commerce store coupled with outstanding customer service. You can buy magnets online with ease at magnet.com.au and we will ship it to your address without delay. All of our product pages include detailed information specific to that individual product. Our FAQ page is also home to technical and practical information that can assist in choosing the best magnet or product. These articles are also full of handy tips for using magnets to achieve your goals and solving any issues.

Neodymium magnets are the most powerful form of magnet available. They are able to produce a surprisingly strong and reliable magnetic hold and should be handled with care. Due to their superior strength they have now become the most popular and widely used type of magnet. In turn this has meant there is a far more extensive range of Neodymium magnets and neo magnetic products available on the retail market. Rare Earth magnets are so strong that they are even used in micro magnet sizes such as 2mm x 1mm disc magnet and many other similar magnets.

Neodymium magnets are found in a huge range of magnetic products such as the separator bars used by food and material manufacturers to remove contaminants. Knife holders and tool holders were previously ‘powered’ by Ferrite magnets however Neodymium magnets are fantastic if a super strong hold is required.

High temperatures, rough handling and moisture are all Neodymium’s kryptonite however these issues can be overcome with careful magnet selection. There are a number of grades of Neodymium which have now been created to withstand higher operating temperatures. Rare Earth magnets are no longer limited to 80°C, there are now magnet grades on the market with capacity to operate at 230°C. You can find a number of these on our website with grades listed with letters in addition to the standard N grade (M, SH, UH, EH, AH).

Rough handling can lead to a Neodymium magnet shattering and splintering. Although this is not an issue for many applications it is worth considering when choosing the shape and strength of your magnet. Most magnet breaks occur when magnets are allowed to snap together or to a ferrous material with force. It is therefore important to choose a magnet strength which is able to be handled or controlled when in use.

Finally moisture and chemicals can lead a Neodymium magnet to corrode and fail. Rare Earth magnets are not normally the best choice for marine applications unless they are provided a waterproof protective layer. It is also important to note that any layer between a magnet and the ferrous material it is adhering to will diminish the power of the magnetic hold. An exception to this is Fishing magnets which have been designed for short term use in waterways. Magnetic fishing uses Neodymium magnets housed in a steel casing and are designed for short periods of submersion before being thoroughly dried for storage.