Neodymium Block Magnets

Name: Neodymium Block Magnets
Brand: Ningbo Beilun Meank Magnetics Co.,Ltd.

The square shaped strong neodymium (NdFeB) magnets are given the name of rare earth neodymium block magnets or rectangular magnets,one strong NdFeB block(rectangular) magnet is expressed by length(L) x width(W) x thickness(T) / height(H).The strongest rare earth magnet blocks are made of neodymium.

Surface Treatment of Rare Earth Ndfeb Magnet Blocks

Surface treatment is crucial for enhancing the performance and durability of rare earth NdFeB magnet blocks. Commonly, a protective coating like nickel, zinc, or epoxy is applied to prevent corrosion and oxidation, ensuring long-term stability. The coating also acts as a barrier against environmental factors, maintaining the magnet's strength and integrity. Additionally, surface treatments can include processes like passivation or phosphating to further improve corrosion resistance. These treatments contribute to the NdFeB block magnet's functionality in various applications, from electronics to renewable energy. Tailoring the surface properties of NdFeB magnets through advanced treatments ensures their optimal performance and extends their service life.

Surface	Coating	Thickness (Microns)	Color	Resistance
Passivation		1	Silver Grey	Temporary Protection
Nickel	Ni+Ni	10-20	Bright Silver	Excellent Against Humidity
	Ni+Cu+Ni			Good Against Salt Spray
Zinc	Zn	8-20	Bright Blue	Excellent Against Salt Spray
	C-Zn		Shinny Color	Superior Against Humidity
Tin	Ni+Cu+Sn	15-20	Silver	Superior Against Humidity
Silver	Ni+Cu+Ag	10-20	Silver	Superior Against Humidity
Gold	Ni+Cu+Au	10-20	Gold	Temporary Protection
Copper	Ni+Cu	10-20	Gold	Excellent Against Humidity&Salt Spray
Epoxy	Epoxy	15-25	Black, Red, Grey	Excellent Against Humidity, Salt Spray, Superior Against Solvents, Gases, Fungi and Bacteria, FDA Approved
	Ni+Cu+Epoxy			Excellent Against Humidity
	Zn+Epoxy
Parylene	Parylene	5-20	Grey	Excellent Against Humidity
Chemical	Ni	10-20	Silver Grey	Excellent Against Humidity

Custom Rare Earth Neodymium Block Magnets

Rare earth Neodymium block magnets, being non-standard items, leverage the favorable machinability of sintered NdFeB material. This allows for the customization of NdFeB block magnets in diverse sizes without the requirement for molds. Strong neodymium rectangular magnets can be tailored to specific dimensions without the need for dedicated molding processes. Whether in small or large quantities, we can produce square shaped neodymium block magnets to meet varying specifications with ease.

How to Order Square Shaped Rare Earth Neodymium Magnet?

1, Choose the correct neodymium magnet grade for the block magnets according to working temperature and the needed magnetic performance.

2, Choose the correct surface treatment according to the application conditions.

3, Clear the magnetization directions for the block neodymium magnets.

We have various square/block rare earth NdFeB magnets for sale, customization is also available. Contact us to know the square magnet price.

The Maximum Working Temperature for Different Grades of Large/tiny Neodymium Block Magnets

Neodymium Material Grade	Maximum-Working Temp.	Curie Temp.
N（N35,N38,N40,N42,N45,N48,N50,N52）	176°F (80°C)	590°F (310°C)
N-M（N35M,N38M,N40M,N42M,N45M,N48M,N50M,N52M）	212°F (100°C)	644°F (340°C)
N-H（N35H,N38H,N40H,N42H,N45H,N48H,N50H）	248°F (120°C)	644°F (340°C)
N-SH（N35SH,N38SH,N40H,N42SH,N45SH,N48SH）	302°F (150°C)	644°F (340°C)
N-UH（N28UH,N30UH,N33UH,N35UH,N38UH,N40UH,N42UH）	356°F (180°C)	662°F (350°C)
N-EH（N28EH,N30EH,N33EH,N35EH,N38EH,N40EH）	392°F (200°C)	662°F (350°C)
N-AH（N28AH,N33AH,N35AH,N38AH）	428°F (230°C)	662°F (350°C)