Standart Shape NdFeB Magnets

Sintered NdFeB magnet is one of the strongest magnetic materials with high residual induction(Br),high intrinsic coercive force(Hcj) and high Energy Product(BH)m, make it suitable for servo motors, disk brushless motors, stepping motors, It industry, MRI, audio products, magnetic separator, water magnetizer and magnetic lift.
  • Product Details
  • Product Photos
  • Technical Details

Product Information

  • Produced by the powder metallurgical method with chemical composition of Nd2Fe14B
  • Very brittle and hard
  • Poorest corrosion resistance of all commercial magnetic material
  • High resistance to magnetic demagnetization
  • Excellent cost to performance ratio
  • Reasonable temperature stability
  • Not suitable for application which exposed to high temperatures
Typical Magnetic Properties
Grade
Residual Induction Br - kGs
Coercive Force Hc - k Oe
Intrinsic Coercive Hci- kOe
BHmax Energy MGOe
Curie Temp. ⁰F / ⁰C
Max. Operating Temp.⁰F/ ⁰C
Density Lb/in.³/ g/cm³
N35
11.7-12.1
10.5-11.2
≥12
33-35
590/310
≥176/80
0.27/7.4-7.5
N38
12.2-12.6
10.5-11.2
≥ 12
35-38
590/310
≥176/80
0.27/7.4-7.5
N40
12.6-13.0
10.5-11.2
≥ 12
38-40
590/310
≥176/80
0.27/7.4-7.5
N42
13.0-13.3
10.5-11.2
≥12
40-43
590/310
≥176/80
0.27/7.4-7.5
N45
13.3-13.7
10.5-11.2
≥12
42-45
590/310
≥176/80
0.27-7.4-7.5
N48
13.7-14.3
≥10.5
≥11
45-49
590/310
≥176/80
0.27-7.4-7.5
N50
14.0-14.6
10.5-13.0
≥11
47-51
590/310
≥176/80
0.27-7.4-7.5
N52
14.4-15.0
10.5-13.5
≥11
50-54
590/310
≥176/80
0.27/7.4-7.5
N38M
12.2-12.6
10.8-11.5
≥14
35-38
608/320
≥212/100
0.27/7.4-7.5
N40M
12.6-13.0
10.8-11.5
≥14
38-40
608/320
≥212/100
0.27/7.4-7.5
N42M
13.0-13.3
10.8-11.5
≥14
40-42
608/320
≥212/100
0.27/7.4-7.5
N45M
13.3-13.8
10.8-11.5
≥14
42-46
608/320
≥212/100
0.27/7.4-7.5
N48M
13.7-14.3
12.8-14.0
≥14
45-49
608/320
≥212/100
0.27/7.4-7.5
N50M
14.1-14.7
13.1-14.3
≥14
48-52
608/320
≥212/100
0.27/7.4-7.5
N30H
10.8-11.2
10.1-10.6
≥17
28-30
626/330
≥248/120
0.27/7.5-7.6
N33H
11.4-11.7
10.1-10.6
≥17
31-33
626/330
≥248/120
0.27/7.5-7.6
N35H
11.7-12.2
10.5-11.2
≥17
33-35
626/330
≥248/120
0.27/7.5-7.6
N38H
12.1-12.5
≥11.3
≥17
36-39
626/330
≥248/120
0.27/7.5-7.6
N40H
12.4-12.8
≥11.6
≥17
38-41
626/330
≥248/120
0.27/7.5-7.6
N42H
12.8-13.2
10.8-11.5
≥17
40-43
626/330
≥248/120
0.27/7.5-7.6
N45H
13.2-13.6
12.5
≥17
43-47
626/330
≥248/120
0.27/7.5-7.6
N48H
13.6-14.2
12.8-13.8
≥16
45-49
626/330
≥248/120
0.27/7.5-7.6
N30SH
10.8-11.2
10.1-10.6
≥20
28-30
644/340
≥302/150
0.27/7.5-7.6
N33SH
11.3-11.7
≥10.6
≥20
31-34
644/340
≥302/150
0.27/7.5-7.6
N35SH
11.7-12.1
≥11.0
≥20
33-36
644/340
≥302/150
0.27/7.5-7.6
N38SH
12.2-12.6
10.8-11.5
≥20
35-38
644/340
≥302/150
0.27/7.5-7.6
N40SH
12.4-12.8
≥11.8
≥20
38-41
644/340
≥302/150
0.27/7.5-7.6
N42SH
12.9-13.2
≥11.8
≥20
38-42
644/340
≥302/150
0.27/7.5-7.6
N44SH
13.0-13.6
12.2-13.4
≥20
41-45
644/340
≥302/150
0.27/7.57.6
N28UH
10.2-10.8
≥9.6
≥25
26-29
662/350
≥356/180
0.27/7.5-7.6
N30UH
10.8-11.3
≥ 10.2
≥25
28-31
662/350
≥356/180
0.27/7.5-7.6
N33UH
11.3-11.7
≥ 10.7
≥25
31-34
662/350
≥356/180
0.27/7.5-7.6
N35UH
11.7-12.2
10.5-11.2
≥25
33-35
662/350
≥356/180
0.27/7.5-7.6
N38UH
12.2-12.9
11.0-12.5
≥25
36-39
662/350
≥356/180
0.27/7.5-7.6
N40UH
12.5-13.3
11.3-12.8
≥25
38-41
662/350
≥356/180
0.27/7.5-7.6
N28EH
10.4-10.9
≥ 9.8
≥30
26-29
680/360
≥392/200
02.7/7.5-7.6
N30EH
10.8-11.3
≥10.2
≥30
28-31
680/360
≥392/200
0.27/7.5-7.6
N33EH
11.4-11.8
≥10.5
≥30
31-34
680/360
≥392/200
0.27/7.5-7.6
N35EH
11.7-12.4
10.9-12.1
≥30
33-37
680/360
≥392/200
0.27/7.5-7.6
N38EH
12.2-12.9
11.5-12.7
≥30
36-40
680/360
≥392/200
0.27/7.5-7.6
N30AH
10.8-11.5
10.1-11.3
≥35
28-32
698/370
≥428/220
0.27/7.5-7.6
N35AH
11.6-12.4
10.7-11.9
≥35
32-36
698/370
≥428/220
0.27/7.5-7.6

Surface Treatments

Surface Treatments
Type Information
MetallicZinc, Nickel, Nickel+Nickel, Nickel+Tin, Nickel+Copper+Nickel, Gold
OrganicEpoxy, Nickel+Epoxy coating
TemporarySurface Passivation
The most common coating for Neodymium magnets is Nickel + Copper + Nickel (Ni + Cu + Ni). This coating offers the magnet relatively good protection from corrosion and passive applications. If the magnet will be exposed to moisture or liquid then consider the use of an organic coating such as Epoxy. A hard wearing coating, Epoxy is suited to applications where the magnet will come under some friction or knocking.

Dimension Range / Nominal Tolerance

Dimension Range / Nominal Tolerance
Ring Outer Dia. Inner Dia. Thickness Disc Diameter Thickness
Maximum 200mm 180mm 50.00mm Maximum 200mm 50.00mm
Minimum 2.60mm 1.80mm 0.50mm Minimum 1.20mm 0.50mm
Tolerance +/-0.1mm +/-0.1mm +/-0.1mm Tolerance +/-0.1mm +/-0.1mm
Block Length Width Thickness Segment & other irregular shapes
Maximum 200.00mm 80.00mm 50.00mm
Minimum 2.0mm 1.50mm 0.50mm Can be manfacture according to
customer's sample or blue print
Tolerance +/-0.1mm +/-0.1mm +/-0.1mm
Magnets are readily available in Blocks, Discs, Cylinders & Rings. Magpole Technology specializes in the supply of short-run prototype magnets including Arc Segments, various magnetic orientations etc. If you need a magnet size that we don't carry in stock, submit a Design-a-Magnet enquiry for a quote on your custom magnet design.

Typical Physical Properties

Parameter
Curie Temperature 310-370
Maximum Operating Temperature 80-180
Resistivity .cm 160
Hardness Hv 560-580
Density g/cm 7.40
Relative Recoil Permeability rec 1.05
Saturation Field Strength kOe 30-40
kA/m 2,400-3,200
Temperature Coefficient of Br %/ -0.12 ~ -0.10
Temperature Coefficient of iHc %/ -0.6