70mm x 40mm Large NdFeB Magnet Disc Round N40 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 40mm Large NdFeB Magnet Disc Round N40 Nickel Technical Specifications:
Item: NDN40-7040
Grade: N40
Material: Neodymium (NdFeB)
Plating: Nickel
Shape: Disk, Round, Disc, Circular, Cylinder
Dimension:
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
Item: NDN40-7040
Grade: N40
Material: Neodymium (NdFeB)
Plating: Nickel
Shape: Disk, Round, Disc, Circular, Cylinder
Dimension:
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
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
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
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
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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