Block Magnets

Short Description:

Sintered NdFeB magnet is contemporary the most powerful magnet magnetic, it not only has high remanence, high coercive force, high magnetic energy product and high performance price excellent characteristics, such as size and easy processing into various shapes, especially suitable for high power, high magnetic field and miniaturization, light-duty and upgrading of products.   CHARACTERISTICS Grade Remanence(Br) Coercive Force(bHc) Intrisic Coercive Force(Hcj) Max Energy Product(BH...


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Sintered NdFeB magnet is contemporary the most powerful magnet magnetic, it not only has high remanence, high coercive force, high magnetic energy product and high performance price excellent characteristics, such as size and easy processing into various shapes, especially suitable for high power, high magnetic field and miniaturization, light-duty and upgrading of products.   CHARACTERISTICS

Grade Remanence(Br) Coercive Force(bHc) Intrisic Coercive Force(Hcj) Max Energy Product(BH)max Working Temp(L/D=0.7)
KGS T KOe KA/m KOe KA/m MGOe KJ/m?
N35 11.8-12.4 1.18-1.24 ≥10.5 ≥835 ≥12 ≥955 ≥33 ≥263 ≤80
N38 12.3-12.8 1.23-1.28 ≥10.8 ≥859 ≥12 ≥955 ≥36 ≥286 ≤80
N40 12.6-13.2 1.26-1.32 ≥10.8 ≥859 ≥12 ≥955 38-41 302-326 ≤80
N42 12.8-13.4 1.28-1.34 ≥10.8 ≥859 ≥12 ≥955 40-44 318-350 ≤80
N45 13.2-13.8 1.32-1.38 ≥11.0 ≥875 ≥12 ≥955 43-47 342-374 ≤80
N48 13.6-14.1 1.36-1.41 ≥11.2 ≥891 ≥12 ≥955 45-49 358-390 ≤80
N50 13.9-14.6 1.39-1.46 ≥11.2 ≥891 ≥12 ≥955 47-51 374-405 ≤80
N52 14.2-14.6 1.42-1.46 ≥10.2 ≥812 ≥11 ≥875 48-53 390-422 ≤80
38M 12.3-12.8 1.23-1.28 ≥11.5 ≥915 ≥14 ≥1114 36-38 286-302 ≤100
40M 12.6-13.2 1.26-1.32 ≥11.8 ≥939 ≥14 ≥1114 38-41 302-326 ≤100
42M 12.8-13.4 1.28-1.34 ≥12.0 ≥955 ≥14 ≥1114 40-43 318-342 ≤100
45M 13.2-13.8 1.32-1.38 ≥12.2 ≥971 ≥14 ≥1114 43-46 342-366 ≤100
48M 13.6-14.0 1.36-1.40 ≥12.5 ≥995 ≥14 ≥1114 45-49 358-390 ≤100
50M 13.9-14.3 1.39-1.43 ≥12.5 ≥995 ≥14 ≥1114 47-51 374-405 ≤100
35H 11.7-12.4 1.17-1.24 ≥10.8 ≥859 ≥17 ≥1353 33-37 263-295 ≤120
38H 12.3-12.8 1.23-1.28 ≥11.5 ≥915 ≥17 ≥1353 36-40 286-318 ≤120
40H 12.6-13.2 1.26-1.32 ≥11.8 ≥939 ≥17 ≥1353 38-41 302-326 ≤120
42H 12.8-13.4 1.28-1.34 ≥12.0 ≥955 ≥17 ≥1353 40-43 318-342 ≤120
45H 13.2-13.8 1.32-1.38 ≥12.2 ≥971 ≥17 ≥1353 43-46 342-366 ≤120
48H 13.6-14.2 1.36-1.42 ≥12.8 ≥1019 ≥17 ≥1274 45-48 358-382 ≤120
33SH 11.4-12.0 1.14-1.20 ≥10.5 ≥835 ≥20 ≥1592 ≥31 ≥247 ≤150
35SH 11.7-12.5 1.17-1.25 ≥10.8 ≥859 ≥20 ≥1592 ≥33 ≥263 ≤150
38SH 12.2-12.7 1.22-1.27 ≥11.3 ≥899 ≥20 ≥1592 36-39 286-310 ≤150
40SH 12.4-13.0 1.24-1.30 ≥11.8 ≥939 ≥20 ≥1592 38-41 302-326 ≤150
42SH 12.8-13.6 1.28-1.36 ≥12.0 ≥955 ≥20 ≥1592 39-43 310-342 ≤150
45SH 13.2-13.7 1.32-1.37 ≥12.2 ≥971 ≥20 ≥1592 43-46 342-366 ≤150
48SH 13.6-14.1 1.36-1.41 ≥12.8 ≥1019 ≥20 ≥1592 45-48 358-382 ≤150
30UH 10.8-11.0 1.08-1.10 ≥9.5 ≥756 ≥25 ≥1990 28-31 223-247 ≤180
33UH 11.3-11.7 1.13-1.17 ≥9.8 ≥780 ≥25 ≥1990 31-34 247-270 ≤180
35UH 11.7-12.1 1.17-1.21 ≥10.5 ≥835 ≥25 ≥1990 33-36 263-286 ≤180
38UH 12.2-12.7 1.22-1.27 ≥11.3 ≥899 ≥25 ≥1990 36-39 286-310 ≤180
40UH 12.4-13.0 1.24-1.30 ≥11.8 ≥939 ≥25 ≥1990 38-41 302-326 ≤180
30EH 10.8-11.5 1.08-1.15 ≥10.1 ≥804 ≥30 ≥2388 28-31 223-247 ≤200
32EH 11.3-12.1 1.13-1.21 ≥10.5 ≥835 ≥30 ≥2388 30-33 238-263 ≤200
35EH 11.8-12.5 1.18-1.25 ≥11.0 ≥875 ≥30 ≥2388 33-35 263-278 ≤200
38EH 12.2-12.7 1.22-1.27 ≥11.3 ≥899 ≥30 ≥2388 36-39 286-310 ≤200
40EH 12.4-13.0 1.24-1.30 ≥11.8 ≥939 ≥30 ≥2388 38-41 302-326 ≤200
1T=10kGs,1kOe=79.6kA/m,lMGOe=7.96kJ/m3。 The open flux irreversible loss of the testing sample at this temperature≤5%.   PHYSICAL PROPERTIES & COATING

Physical Properties of Sintered NdFeB Material
Items Parameter Values Unit
Curie Temperature 310~380
Relative Recoil Permeability 1.02~1.05
Reversible Temperature Coefficient of Br (20~100℃) -0.09~-0.13 %/℃
Reversible Temperature Coefficient of Hcj (20~100℃) -0.4~-0.7 %/℃
Density 7.50~7.70 g/cm3
Vickers Hardness 550~700
Bending Strength -0.09~-0.13 MPa
Tensile Strength ≥80 MPa
Compressive Strength 800 ~1050 MPa
Electric Resistivity 150 μΩ·cm
Thermal Conductivity 8~10 W/(M·℃)
Coefficient of Thermal Expansion (Parallel to the orientation) 5 10-6/K
Coefficient of Thermal Expansion (vertical to the orientation) -1.5 10-6/K
Young’s Modulus 150~200 GPa
Specific Heat(20℃~320℃) 3.0~4.6 J/(g·k)
weight loss(low weight loss products) ≤2 mg/cm2
Physical Properties & Application to Environment of the Coating
Coating Material Colour Properties Environment of Application Thickness of Coating layer
Zine Blue, Black and rainbow etc Compact, Stable and Homogeneous With reasonalbe capability of anticorrosion 6um≤∮≤12
Nickel-Copper-Nickel White and black Light and Stable Suitable for higher corrosive environment 15μm≤∮≤30pm
Phosphorization Colorless or light gray uniform thickness short-term anticorrosion -
Epoxy Black and Gray layer with certain luster, insurability Suitable for higher corrosive environment ≥15μm
Parylene transparency uniform thickness, density pinholes-free and insurability Excellent capability of anticorrosion especially for small items 0.1μm≤∮≤100pm
Ni+Cu+Epoxy Black Layer with certain luster insurability and stability Excellent capability of anticorrosion. Suitable for hostile environment salt spray resistance>300hr 10-30μm
Al+Epoxy Black Layer with certain luster insurability and stability Excellent capability of anticorrosion. Suitable for hostile environment salt spray resistance>650hr Widely used in new energy auto magnets 15-35μm
Demagnetization curve
48H                                  40SH
38UH                               35EH
Size and appearance
A.Product Size
1. Dimension tolerance: length, width, thickness, diameter, etc. (tolerance range is generally not less than + 0.05mm).2、Form tolerance: vertical degree (0.8°or less), parallel (0.05 mm or less), ovality (0.05 mm or less), concentricity (0.05 mm or less), etc. If the customer has any requirement, it shall follow the standard confirmed after consultation with the customer.
B.Product Appearance
Appearance cleanliness (such as watermark, color), degree of damage (zinc loss, Angle loss, edge knock, black skin), crack, sand hole, knife lines, etc.
Square products        Cylindrical products
Tile shape products            Ring products
Other characteristics
1. Magnetized method: According to the requirements of customers. 2. Polarity requirements: Mark according to customer requirements. 3. Packaging materials and methods: general use kraft paper, foam board and carton packaging, special cases using vacuum packaging and shielding packaging, each weighing less than 20 kg. If customer has special requirements for packaging according to customer requirements. 4. Attached documents:

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