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70mm x 40mm Large NdFeB Magnet Disc Round N40 Nickel, Wholesales Magnetic Dots, Super Strong Rare Earth Licensed Sintered NdFeB Disk Round Magnet for Toy and Craft, Nickel Coated Neodymium Disc Permanent Magnets China Supplier Exporter
70mm x 40mm Large NdFeB Magnet Disc Round N40 Nickel Technical Specifications:
Material: Neodymium (NdFeB)
Shape: Disk, Round, Disc, Circular, Cylinder
Total Diameter (D): Ø 70 mm
Total Height (H): 40 mm
Tolerance: ±0.05 mm
Magnetisation Direction: Axial / Radial
Residual Magnetic Flux Density (Br): 1250-1280 mT (12.5-12.8 kGs)
Energy Density (BH)max: 302-326 KJ/m³ (38-41 MGOe)
Coercivity Force (Hcb): ≥ 907 kA/m ( ≥ 11.4 kOe)
Intrinsic Coercivity Force (Hcj): ≥ 955 kA/m ( ≥ 12 kOe)
Maximum Operation Temperature: 80 °C
Delivery Time: 14-35 days
Magnets of this volume and power are sometimes called ‘supermagnets’. Get aware of the strength, keep strictly away from children, use gloves. Handle with care and notice that metallic objects like keys or scissors nearby can be abruptly moved by its magnetic pull. Neodymium magnets are made of neodymium, iron and boron and are the strongest raw magnets. For more information please click here: facts about magnetism; safety precautions.
NdFeB Supermagnet Magnetic Grades and Temperature:
The Grade of a magent directly refers to the Maximum Energy Product of the material that composes the magnet. It in no way refers to the physical properties of the magnet. Grade is generally used to describe how “strong” a permanent magnet material is. The energy products is specified in the unites Gauss Oersted.
One MGOe is 1,000,000 Gauss Obersted. A grade forty (N40) would have a Maximum Energy Product of 40 MGOe.The higher the grade the “stronger” the magnet.
Magnetic materials have a wide range of working temperatures. The following chart the various materials and their maximum working temperature. NdFeB material comes in many different heat tolerances but as the heat tolerance increases the maximum available fulx density decreases:
Description Larger Disc Magnet N45 Nickel
Material: NdFeB magnet
Woking Temperature Grade Max.Operating Temperature
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