Magnet Grades

Neodymium Grades

The grade of a Neodymium (Rare Earth) magnet, such as for example N42, provides an accurate indicator of its magnetic strength. The general advice is that the higher the grade of the magnet, the stronger the magnetic field. The higher the grade of magnet the more brittle the magnet will be, for this reason most of our stock is N45 for a nice mix of magnetic power and stability.

Higher grade magnets are ideal for use in tight spaces where a larger magnet isn’t feasible or for where an intense magnetic field is required such as in the food industry in order to extract ferrous contamination from product lines. Letters following the grade, such as in N42SH, denote heat tolerance, with the SH variant being effective up to 150°C. The highest heat-tolerant Neodymium magnets, such as N30EH, can withstand temperatures up to 200°C. Magnets Australia offers a variety of Neodymium magnets, ranging from N30 to N52M, with heat tolerances between 80°C and 200°C.

All of our magnetic separation equipment for the food industry is made using powerful N50 grade magnet however we are able to custom make with the strongest magnet available on the market being N52M magnet.

Ceramic (Ferrite) Grades

At Magnets Australia, we stock affordable, lightweight Ceramic magnets made from Y30 material, available in various shapes and sizes. We also carry the Y10 isotropic grade for flexible magnetic media. Ceramic magnets are known for their wide magnetic field, resistance to corrosion and demagnetization, and can operate in temperatures as high as 250°C.

Samarium Grades

We offer a wide range of Samarium Magnets being in discs, cylinders, blocks and rings made from the Sm2Co17 (2-17) grade alloy. This composition enables them to maintain their magnetic properties even at temperatures up to 350°C. Even without a protective coating, they provide superior corrosion resistance compared to other magnet types but are more prone to chipping.

Alnico Grades

Alnico magnets have the highest operating temperature of all Rare Earth magnets, capable of withstanding up to 500°C. Magnets Australia supplies Alnico magnets in blocks, cylinders, discs, pots, and horseshoe shapes. These magnets are produced using a highly conductive compound through either casting or sintering processes. We stock Alnico magnets in grades such as Alnico 5 and Alnico 8.
These magnets do tend to loose their magnetism over time.