70mm x 15mm Disc NdFeB Supermagnet N45 Nickel, Super Strong Rare Earth Licensed Sintered NdFeB Disk Round Magnet for Toy and Craft, Nickel Coated Neodymium Disc Permanent Magnets China Supplier
70mm x 15mm Disc NdFeB Supermagnet N45 Nickel Technical Specifications:
Item: NDN45-7015
Grade: N45
Material: Neodymium (NdFeB)
Plating: Nickel
Shape: Disk, Round, Disc, Circular, Cylinder
Dimension:
Total Diameter (D): Ø 70 mm
Total Height (H): 15 mm
Tolerance: ±0.05 mm
Magnetisation Direction: Axial / Radial
Residual Magnetic Flux Density (Br): 1320-1380 mT (13.2-13.8 kGs)
Energy Density (BH)max: 342-366 KJ/m³ (43-46 MGOe)
Coercivity Force (Hcb): ≥ 923 kA/m ( ≥ 11.6 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 Super Strong Magnet 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 Magnet
Material: NdFeB magnet
Woking Temperature Grade Max.Operating Temperature
N35-N52 80°c
33M-48M 100°c
33H-48H 120°c
30SH-45SH 150°c
30UH-40UH 180°c
28EH-38EH 200°c
28AH-35AH 220°c
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