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Sintered NdFeB

 

Trade Terms :

EXW, FOB Ningbo, Door to door

 

Place of Origin :

Ningbo City, Zhejiang Province, China

 

Certificate :

IATF16949, ISO9001:2015

 

Payment Terms :

T/T

 

Delivery Time:

7-20 working days for making sample, 20 to 50 working days for production it depends on the mass quantities

Sintered NdFeB Magnetic Properties Coating & Physical parameters
Sintered NdFeB

Known as the third Generation of Rare Earth Magnets, Neodymium-Iron-Boron(NdFeB) magnets are the most powerful and advanced commercialized permanent magnets today. NdFeB magnets are introduced in 1980. This material offers the highest Energy Product (BH)max commercially available. Today their typical applications include high performance sensors, various DC motors, linear actuators, MRI, wind energy turbines etc. The highest (BH)max reaches up to 51MGOe. The choice of strip casting and HDDR technology in our factory allow us to make high performance NdFeB over N52 possible. The intrinsic coercive force is over 30000 Oe. Also, magnets are protected with effective surface treatment to prevent corrosion.

 

Why Choose Sintered NdFeB Magnet?

 

*Chemical Composition: Nd2Fe14B

  Neodymium magnets are hard, brittle and easily corrode.

 

*Moderate Temperature Stability

  Neodymium magnets lose -0.09~-0.13% of Br/℃. Their working stability is under 80℃ for low Hcj Neodymium magnets and above 200℃ for high Hcj Neodymium magnets.

 

*Excellent Strength Value

  The highest (BH) max reaches up to 51MGOe.

 

*Advanced Technology

  The choice of Strip casting and HDDR technology in our factory allows us to make high performance NdFeB over N52 possible.

 

*Extremely Resistance to Demagnetization with Hci

  The intrinsic coercive force is over 30,000 Oe.

 

*Effective Surface Treatment to Prevent Corrosion

  Surface treatments have been developed that allow them to be used in most applications. The treatments include gold, nickel, zinc and tin plating and epoxy resin coating.

Magnetic Properties

MAGNETIC CHARACTERISTICS AND PHYSICAL PROPERTIES OF SINTERED Nd-Fe-B

 

        PROPERTIES   


   GRADE

BrmT
(KGs)
Hcb KA/m
(Koe)
Hcj KA/m
(KOe)
(BH)max KJ/m³
(MGOe)
TW ℃
N35 1180-1220
(11.8-12.2)
≥860
(≥10.8)
≥955
(≥12)
263-287
(33-36)
≤80
N38 1230-1250
(12.3-12.5)
≥860
(≥10.8)
≥955
(≥12)
287-311
(36-39)
≤80
N40 1250-1280
(12.5-12.8)
≥860
(≥10.8)
≥955
(≥12)
303-326
(38-41)
≤80
N42 1280-1320
(12.8-13.2)
≥860
(≥10.8)
≥955
(≥12)
318-342
(40-43)
≤80
N45 1330-1370
(13.3-13.7)
≥860
(≥10.8)
≥955
(≥12)
342-366
(43-46)
≤80
N48 1370-1400
(13.7-14.0)
≥836
(≥10.5)
≥955
(≥12)
358-390
(45-49)
≤80
N50 1390-1430
(13.9-14.3)
≥836
(≥10.5)
≥955
(≥12)
374-406
(47-51)
≤60
N52 1420-1450
(14.2-14.5)
≥836
(≥10.5)
≥955
(≥12)
390-422
(49-53)
≤60
N54 1450-1500
(14.5-15.0)
≥836
(≥10.5)
≥955
(≥12)
406-438
(51-55)
≤60
N35M 1180-1220
(11.8-12.2)
≥860
(≥10.8)
≥1114
(≥14)
263-287
(33-36)
≤100
N38M 1230-1250
(12.3-12.5)
≥876
(≥11.0)
≥1114
(≥14)
287-311
(36-39)
≤100
N40M 1250-1280
(12.5-12.8)
≥908
(≥11.4)
≥1114
(≥14)
303-326
(38-41)
≤100
N42M 1280-1320
(12.8-13.2)
≥939
(≥11.8)
≥1114
(≥14)
318-342
(40-43)
≤100
N45M 1330-1370
(13.3-13.7)
≥971
(≥12.2)
≥1114
(≥14)
342-366
(43-46)
≤100
N48M 1370-1400
(13.7-14.0)
≥1011
(≥12.7)
≥1114
(≥14)
358-390
(45-49)
≤100
N50M 1390-1430
(13.9-14.3)
≥1035
(≥13.0)
≥1114
(≥14)
374-406
(47-51)
≤100
N52M 1420-1480
(14.2-14.8)
≥1059
(≥13.3)
≥1114
(≥14)
390-422
(49-53)
≤100
35H 1180-1220
(11.8-12.2)
≥876
(≥11.0)
≥1353
(≥17)
263-287
(33-36)
≤120
38H 1230-1250
(12.3-12.5)
≥908
(≥11.4)
≥1353
(≥17)
287-310
(36-39)
≤120
40H 1250-1280
(12.5-12.8)
≥932
(≥11.7)
≥1353
(≥17)
303-326
(38-41)
≤120
42H 1280-1320
(12.8-13.2)
≥955
(≥12.0)
≥1353
(≥17)
318-342
(40-43)
≤120
45H 1330-1370
(13.3-13.7)
≥995
(≥12.5)
≥1353
(≥17)
342-366
(43-46)
≤120
48H 1370-1400
(13.7-14.0)
≥1019
(≥12.8)
≥1353
(≥17)
358-390
(45-49)
≤120
50H 1400-1440
(14.0-14.4)
≥1051
(≥13.2)
≥1353
(≥17)
374-406
(47-51)
≤120
52H 1420-1460
(14.2-14.6)
≥1066
(≥13.4)
≥1353
(≥17)
382-422
(48-53)
≤120
33SH 1130-1180
(11.3-11.8)
≥836
(≥10.5)
≥1592
(≥20)
247-272
(31-34)
≤150
35SH 1180-1220
(11.8-12.2)
≥876
(≥11.0)
≥1592
(≥20)
263-287
(33-36)
≤150
38SH 1230-1250
(12.3-12.5)
≥884
(≥11.1)
≥1592
(≥20)
287-311
(36-39)
≤150
40SH 1250-1280
(12.5-12.8)
≥916
(≥11.5)
≥1592
(≥20)
302-326
(38-41)
≤150
42SH 1280-1320
(12.8-13.2)
≥939
(≥11.8)
≥1592
(≥20)
318-342
(40-43)
≤150
45SH 1330-1370
(13.3-13.7)
≥939
(≥11.8)
≥1592
(≥20)
342-366
(43-46)
≤150
30UH 1080-1130
(10.8-11.3)
≥756
(≥9.5)
≥1990
(≥25)
223-247
(28-31)
≤180
33UH 1130-1180
(11.3-11.8)
≥820
(≥10.3)
≥1990
(≥25)
247-271
(31-34)
≤180
35UH 1180-1220
(11.8-12.2)
≥844
(≥10.6)
≥1990
(≥25)
263-287
(33-36)
≤180
38UH 1230-1250
(12.3-12.5)
≥884
(≥11.1)
≥1990
(≥25)
287-311
(36-39)
≤180
40UH 1240-1280
(12.4-12.8)
≥912
(≥11.5)
≥1990
(≥25)
302-326
(38-41)
≤180
28EH 1040-1090
(10.4-10.9)
≥756
(≥9.5)
≥2389
(≥30)
207-231
(26-29)
≤200
30EH 1080-1130
(10.8-11.3)
≥756
(≥9.5)
≥2389
(≥30)
223-247
(28-31)
≤200
33EH 1130-1180
(11.3-11.8)
≥820
(≥10.3)
≥2389
(≥30)
247-271
(31-34)
≤200
35EH 1180-1220
(11.7-12.2)
≥844
(≥10.6)
≥2389
(≥30)
263-287
(33-36)
≤200
38EH 1220-1250
(12.2-12.5)
≥899
(≥11.3)
≥2388
(≥30)
287-310
(36-39)
≤200

 

REMARKS:

※ The above-mentioned data of magnetic parameters and physical properties are given at room temperature.

※ The maximum service temperature of magnet is changeable due to the ratio length and diameter and environmental factors.

※ Density: 7.4~7.6g/cm³; αBr: -0.09~-0.13%/℃; αHcj: -0.50~-0.80%/℃ ; Hardness: Hv 600 ;

Coating & Physical parameters
Coating and Corrosive Resistance of Sintered NdFeB
Surface Coating Colour Thickness(μm) Standard Resistance Corrosive Resistance
PCT Test Salt Spray Test
Nickel Nickel Silver 10-20 48hr or 72hr 72hr EXCELLENT
Ni+Cu+Ni
Zinc Blue Zinc Bright Blue 8-20 24hr 24hr GOOD
Colour Zinc Shinny Colour
Epoxy Epoxy Black / Grey 15-25 48hr 96hr EXCELLENT
Ni+Cu+Epoxy
Tin Ni+Cu+Sn Silver 15-20 72hr 72hr SUPERIOR
Parylene Parylene Grey 15-25 96hr 200hr SUPERIOR
Teflon Teflon Grey 10-20 12hr 24hr SUPERIOR
Phosphorization / Grey 1-2 - - TEMPORARY PROETCTION
Passivation / Grey 1-2 - - TEMPORARY PROETCTION

 

※ PCT test(120℃,100%RH,2.0atm);Salt Spray Test(5%NaCl,35℃ continue spray).

 

 

Item Parameters Reference Value
Additional
Magnetic
Properties
Temp.Coeff.of Br (α(Br))/(%/K)  -0.08 ~ -0.12
Temp.Coeff.of Hcj (β(Hcj))/(%/K)  -0.42 ~ -0.70
Curie Temperature (Tc)/K  310 ~ 380
Recoil Permeability (μrec)[-] 1.05
Mechanical
and Physical
Properties
Density (g/cm³)  7.6
Vickers Hardness (Hv)  650
Electrical Resistivity (μΩom)  1.4
Compressive Strength (Mpa)  1050
Tensile Strength (Mpa)  80
Bending Strength (Mpa)  290
Thermal Conductivity (W/(moK))  6 ~ 8
Young's Modulus (Gpa)  160
 Coefficient of Thermal Expansive (C⊥) (10-6/K)  -1.5
 Coefficient of Thermal Expansive (C‖) (10-6/K)  6.5

 

※ Technical specifications and parameters are subjected to change without notice.