NdFeB Block Strong Magnets N52 17 x 12 x 5 mm Nickel Coating

NdFeB Block Strong Magnets N52 17 x 12 x 5 mm Nickel Coating, Super Strong Block Neodymium Magnets,  Super Strong Permanent Magnet

Strong Magnets Specification:

Part No.: HSNB-17-12-5-N52Ni
Magnetisation Grade: N52
Material: Sintered Neodymium-Iron-Boron (Rare Earth NdFeB)
Plating / Coating: Nickel (Ni-Cu-Ni)
Magnet Shape: Block, Rectangular, Rectangle, Square
Magnet Size:
Total Length (L): 17 mm
Total Width (W): 12 mm
Total Thickness (T): 5 mm
Magnetisation Direction: Axial
Residual Magnetic Flux Density (Br): 1430-1480 mT (14.3-14.8 kGs)
Energy Density (BH)max: 398-422 KJ/m³ (50-53 MGOe)
Coercivity Force (Hcb): ≥ 796 kA/m ( ≥ 10.0 kOe)
Intrinsic Coercivity Force (Hcj): ≥ 876 kA/m ( ≥ 11 kOe)
Maximum Operation Temperature: 60 °C
Tolerance: ±0.05 mm

Permanent magnets are those objects that are magnetized and will stay magnetized forever. One can make a permanent magnet by taking a hard ferromagnetic substance, like hard iron, lodestone, cobalt, and a number of rare earth metals, and magnetizing it strongly. Soft ferromagnetic substances may gain a temporary magnetic field, but will tend to lose it rather quickly. Electromagnets, on the other hand, consist of coils of wire that gain a magnetic field when electricity is run through it, but lose it immediately when the electricity ceases.

When it comes to magnets bigger doesn’t necessarily always mean stronger. A lot of other factors determine a magnet’s strength, but size and shape should still be considered. For example, if you are making fridge magnets from heavy materials, strong disc shaped magnets that have a similar but slightly smaller surface area as the materials you are using are generally optimal.