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Sintered Neodymiuminfo-icon has become the mainstay for the magnetinfo-icon world. It is relatively low cost for the amount of holding force it produces. There are no USA producers of Neodymiuminfo-icon Iron Boron. It typically comes from China, Japan, and from some European producers. Applications are many.

Sintered Neodymiuminfo-icon SDS sheet can be found here.

Product Information

Magnetic Characteristics
GradeBr (Residual Induction) Br (Residual Induction) Hcb (Coercive Force) Hcb (Coercive Force) Hcj (Intrinsic Coercive Force) Hcj (Intrinsic Coercive Force) Bhmax (Maximum Energy Product) Bhmax (Maximum Energy Product)
mT KGs KA/m KOe KOe KA/m KJ/m³ MGOe
N30
1070-1110
10.7-11.0
796-865
10.0-11.0
≥ 12
≥ 955
223-247
28-31
N33
1120-1170
11.2-11.7
836-915
10.5-11.5
≥ 12
≥ 955
243-263
31-33
N35
1160-1210
11.6-12.1
860-930
10.8-11.7
≥ 12
≥ 955
263-286
33-36
N38
1220-1280
12.2-12.8
860-930
10.8-11.7
≥ 12
≥ 955
286-310
36-39
N40
1250-1290
12.5-12.9
923-990
11.6-12.5
≥ 12
≥ 955
303-318
38-40
N42
1280-1320
12.8-13.2
860-930
10.8-11.7
≥ 12
≥ 955
318-342
40-43
N45
1320-1360
13.2-13.6
860-930
10.8-11.7
≥ 12
≥ 955
340-372
42-46
N48
1380-1430
13.8-14.3
836-915
10.5-11.5
≥ 12
≥ 955
366-390
46-49
N50
1400-1450
14.0-14.5
836-915
10.5-11.5
≥ 12
≥ 955
376-408
47-51
N52
1420-1480
14.2-14.8
836-915
10.5-11.5
≥ 11
≥ 876
390-422
49-53
N55
1440-1510
14.4-15.1
716-785
9.0-10.0
≥ 11
≥ 876
414-446
52-56
1070-1110
10.7-11.0
812-876
10.2-11.0
≥ 13
≥ 1114
207-223
26-28
1080-1150
10.8-11.5
836-915
10.5-11.5
≥ 13
≥ 1114
223-247
28-31
1120-1170
11.2-11.7
868-938
10.9-11.8
≥ 13
≥ 1114
247-263
31-33
1160-1210
11.6-12.1
899-970
11.3-12.2
≥ 13
≥ 1114
263-286
33-36
1220-1280
12.2-12.8
923-990
11.6-12.5
≥ 13
≥ 1114
286-310
36-39
1250-1290
12.5-12.9
955-1010
12.0-12.9
≥ 13
≥ 1114
302-326
38-41
1280-1320
12.8-13.2
971-1025
12.2-13.1
≥ 13
≥ 1114
318-342
40-43
1320-1360
13.2-13.6
1000-1034
12.5-13.4
≥ 13
≥ 1114
344-376
43-47
1370-1420
13.7-14.2
1011-1055
12.7-13.6
≥ 13
≥ 1114
366-390
46-49
1420-1480
14.2-14.8
1035-1090
13.0-13.9
≥ 13
≥ 1114
376-408
47-51
1070-1110
10.7-11.0
796-865
10.0-10.9
≥ 17
≥ 1353
223-247
28-31
1120-1170
11.2-11.7
836-915
10.5-11.5
≥ 17
≥ 1353
247-263
31-33
1160-1210
11.6-12.1
868-938
10.9-11.8
≥ 17
≥ 1353
263-286
33-36
1220-1280
12.2-12.8
899-970
11.3-11.7
≥ 17
≥ 1353
286-310
36-39
1250-1290
12.5-12.9
923-990
11.6-12.5
≥ 17
≥ 1353
302-326
38-41
1280-1320
12.8-13.2
955-1010
12.0-12.9
≥ 17
≥ 1353
318-342
40-43
1320-1360
13.2-13.6
971-1025
12.2-13.1
≥ 17
≥ 1353
344-376
43-47
1370-1410
13.7-14.1
1011-1055
12.7-13.6
≥ 17
≥ 1353
366-390
46-49
1390-1440
13.9-14.4
1035-1090
13.0-13.9
≥ 16
≥ 1274
376-408
47-51
1080-1130
10.8-11.3
811-880
10.2-11.1
≥ 20
≥ 1592
223-247
28-31
1160-1170
11.2-11.7
844-912
10.6-11.5
≥ 20
≥ 1592
247-263
31-33
1160-1210
11.6-12.1
876-955
11.0-12.0
≥ 20
≥ 1592
263-286
33-36
1220-1280
12.2-12.8
907-975
11.4-11.7
≥ 20
≥ 1592
286-310
36-39
1250-1290
12.5-12.9
939-955
11.8-12.0
≥ 20
≥ 1592
302-326
38-41
1300-1350
13.0-13.5
955-1010
12.0-12.9
≥ 20
≥ 1592
312-344
39-43
1320-1360
13.2-13.6
979-1030
12.3-13.2
≥ 20
≥ 1592
344-376
43-47
1370-1410
13.7-14.1
1000-1034
12.5-13.4
≥ 19
≥ 1512
366-390
46-49
970-1050
9.7-10.5
732-812
9.2-10.2
≥ 25
≥ 1990
183-199
23-25
1040-1080
10.4-10.8
764-833
9.6-10.5
≥ 25
≥ 1990
207-223
26-28
1080-1130
10.8-11.3
812-876
10.2-11.0
≥ 25
≥ 1990
223-239
28-30
1130-1170
11.3-11.7
852-923
10.7-11.6
≥ 25
≥ 1990
247-263
31-34
1160-1210
11.6-12.1
860-930
10.8-11.7
≥ 25
≥ 1990
263-286
33-36
1220-1280
12.2-12.8
876-955
11.0-12.0
≥ 25
≥ 1990
286-310
36-39
1250-1290
12.5-12.9
915-980
11.5-11.8
≥ 25
≥ 1990
303-318
38-40
1300-1350
13.0-13.5
955-1010
12.0-12.9
≥ 25
≥ 1990
312-344
39-43
1320-1360
13.2-13.6
1000-1034
12.5-13.4
≥ 24
≥ 1910
344-380
43-47
1050-1090
10.5-10.9
780-850
9.8-10.7
≥ 30
≥ 2388
211-235
26-28
1080-1130
10.8-11.3
812-876
10.2-11.0
≥ 30
≥ 2388
223-247
28-31
1140-1180
11.4-11.8
820-868
10.3-11.2
≥ 30
≥ 2388
247-263
31-34
1160-1220
11.6-12.0
836-915
10.5-11.5
≥ 30
≥ 2388
263-286
33-35
1180-1240
11.8-12.4
899-970
11.3-12.2
≥ 30
≥ 2388
282-306
36-38
1230-1285
12.3-12.8
915-980
11.5-11.8
≥ 30
≥ 2388
301-314
38-40
1300-1350
13.0-13.5
971-1025
12.2-13.1
≥ 29
≥ 2308
306-330
40-42
1040-1080
10.4-10.8
780-850
9.8-10.7
≥ 34
≥ 2706
207-231
26-29
1080-1120
10.8-11.2
812-876
10.2-11.0
≥ 34
≥ 2706
223-247
28-31
1130-1170
11.3-11.7
812-876
10.2-11.0
≥ 34
≥ 2706
239-262
30-33
1150-1220
11.5-11.9
883-956
11.2-11.6
≥ 34
≥ 2706
262-286
33-35
1190-1250
11.9-12.5
923-990
11.6-12.5
≥ 33
≥ 2626
278-302
36-38
1160-1210
11.6-12.1
860-930
10.8-11.7
≥ 12
≥ 955
263-286
33-36
1160-1210
11.6-12.1
868-938
10.9-11.8
≥ 14
≥ 1114
263-286
33-36
1320-1360
13.2-13.6
971-1025
12.2-13.1
≥ 14
≥ 1114
344-376
43-47
1220-1280
12.2-12.8
899-970
11.3-12.2
≥ 17
≥ 1353
286-310
36-39
1250-1290
12.5-12.9
923-990
11.6-12.5
≥ 17
≥ 1353
302-326
38-41
1320-1360
13.2-13.6
971-1025
12.2-13.1
≥ 17
≥ 1353
344-376
43-47
1130-1170
11.3-11.7
844-912
10.6-11.5
≥ 20
≥ 1592
247-263
31-33
1160-1210
11.6-12.1
876-944
11.0-11.9
≥ 20
≥ 1592
263-286
33-36
1220-1280
12.2-12.8
907-975
11.4-12.3
≥ 20
≥ 1592
286-310
36-39
1300-1350
13.0-13.5
955-1010
12.0-12.9
≥ 20
≥ 1592
312-344
39-43
1080-1130
10.8-11.3
804-872
10.1-11.0
≥ 20
≥ 1592
223-247
28-31
1130-1170
11.3-11.7
844-912
10.6-11.5
≥ 20
≥ 1592
247-263
31-33
1160-1210
11.6-12.1
876-944
11.0-11.9
≥ 20
≥ 1592
263-286
33-36
1220-1280
12.2-12.8
907-975
11.4-12.3
≥ 20
≥ 1592
286-310
36-39
1320-1360
13.2-13.6
979-1030
12.3-13.2
≥ 20
≥ 1592
344-376
43-47
1080-1130
10.8-11.3
812-876
10.2-11.0
≥ 25
≥ 1990
223-247
28-31
1130-1170
11.3-11.7
852-920
10.7-11.6
≥ 25
≥ 1990
247-263
31-33
1220-1280
12.2-12.8
876-944
11.0-11.9
≥ 25
≥ 1990
286-310
36-39
1250-1290
12.5-12.9
915-980
11.5-11.8
≥ 25
≥ 1990
303-318
38-40
1080-1130
10.8-11.3
812-876
10.2-11.0
≥ 30
≥ 2388
223-247
28-31
1180-1240
11.8-12.4
899-970
11.3-12.2
≥ 30
≥ 2388
282-306
36-38
1080-1120
10.8-11.2
812-876
10.2-11.0
≥ 34
≥ 2706
223-247
28-31
Composition Characteristics
Auxiliary Characteristics
Thermal Characteristics
GradeMax Operating Temp Curie Temp Rev Temp Coeff Rev Temp Coeff
°C %/°C Br (TC a(Br) %/°C) Hcj (Tc a(Hcj) %/°C)
N30
80
310
-0.120
-0.750
N33
80
310
-0.120
-0.750
N35
80
310
-0.120
-0.750
N38
80
310
-0.120
-0.750
N40
80
310
-0.120
-0.750
N42
80
310
-0.120
-0.750
N45
80
310
-0.120
-0.750
N48
80
310
-0.120
-0.750
N50
80
310
-0.120
-0.750
N52
80
310
-0.120
-0.750
N55
80
310
-0.120
-0.750
100
310
-0.120
-0.675
100
310
-0.120
-0.675
100
310
-0.120
-0.675
100
310
-0.120
-0.675
100
310
-0.120
-0.675
100
310
-0.120
-0.675
100
310
-0.120
-0.675
100
310
-0.120
-0.675
100
310
-0.120
-0.675
100
310
-0.120
-0.675
120
310
-0.120
-0.605
120
310
-0.120
-0.605
120
310
-0.120
-0.605
120
310
-0.120
-0.605
120
310
-0.120
-0.605
120
310
-0.120
-0.605
120
310
-0.120
-0.605
120
310
-0.120
-0.605
120
310
-0.120
-0.605
150
320
-0.120
-0.535
150
320
-0.120
-0.535
150
320
-0.120
-0.535
150
320
-0.120
-0.535
150
320
-0.120
-0.535
150
320
-0.120
-0.535
150
320
-0.120
-0.535
150
320
-0.120
-0.535
180
320
-0.120
-0.465
180
320
-0.120
-0.465
180
320
-0.120
-0.465
180
320
-0.120
-0.465
180
320
-0.120
-0.465
180
320
-0.120
-0.465
180
320
-0.120
-0.465
180
320
-0.120
-0.465
180
320
-0.120
-0.465
200
320
-0.120
-0.420
200
320
-0.120
-0.420
200
320
-0.120
-0.420
200
320
-0.120
-0.420
200
320
-0.120
-0.420
200
320
-0.120
-0.420
200
320
-0.120
-0.420
220
320
-0.120
-0.393
220
320
-0.120
-0.393
220
320
-0.120
-0.393
220
320
-0.120
-0.393
220
320
-0.120
-0.393
80
320
-0.110
-0.750
100
320
-0.110
-0.675
100
320
-0.110
-0.675
120
320
-0.110
-0.605
120
320
-0.110
-0.605
120
320
-0.110
-0.605
150
320
-0.110
-0.535
150
320
-0.110
-0.535
150
320
-0.110
-0.535
150
320
-0.110
-0.535
150
320
-0.100
-0.535
150
320
-0.100
-0.535
150
320
-0.100
-0.535
150
320
-0.100
-0.535
150
320
-0.100
-0.535
180
320
-0.100
-0.465
180
320
-0.100
-0.465
180
320
-0.100
-0.465
180
320
-0.100
-0.465
200
320
-0.100
-0.420
200
320
-0.100
-0.420
220
320
-0.100
-0.393
Mechanical/Physical Characteristics
GradeDensity
g/cm3
N30
7.5-7.8
N33
7.5-7.8
N35
7.5-7.8
N38
7.5-7.8
N40
7.5-7.8
N42
7.5-7.8
N45
7.5-7.8
N48
7.5-7.8
N50
7.5-7.8
N52
7.5-7.8
N55
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
7.5-7.8
Chemical Characteristics
Preferred Geometry
Comparison Chart
Grade BH Curves
SDS
Hide Section 1 - Product Name
Product Name: Sintered Neodymium Iron Boron (NdFeB) Permanent Magnet
Hide Section 2 - Hazardous Ingredients
Chemical Name: Sintered Neodymium Iron Boron (NdFeB) Permanent Magnet
Material/Component(s):
Material or ComponentWeight %CAS No.ACGUH TLV (mg/m^3)Notes
Neodymium
33%
7440-00-8
Not Established
Iron
65%
7439-89-6
10 (oxide)
Boron
1.3%
7440-42-8
10
test
Nickel
0.01-0.4%
7440-02-0
1 (dust) / 0.1 (fume)
Plating
Copper
0.01-0.2%
7440-50-8
1 (dust) / 0.2 (fume)
Plating
Dysprosium
0-4%
7429-91-6
Not established
May be used in high-temp grades
Cobalt
0-5%
7440-48-4
0.02
May be used in high-temp grades
Praseodymium
0-5%
74410-10-1
Not Established
N/A
Hide Section 3 - Physical Characteristics
Boiling Point: N/A
Vapor Pressure: (mm Hg.) N/A
Vapor Density: (air = 1) N/A
Specific Gravity: 7.1 - 7.6
Melting Point: Above 1000 Degrees C (1832 Degrees F)
Evaporation Rate: N/A
Odor: No Odor
Solubility in Water: Not Soluble
Appearance: Silver-Gray dark metallic
Hide Section 4 - Fire and Explosion Hazard Data
Flash Point: N/A
FLAMMABLE LIMITS: N/A
LEL: N/A
UEL: N/A
Extinguishing Media: Dry Chemicals without Oxygen Compounds or Sand
Special Fire Fighting Procedures: Do not use Halon agents or water on smoldering, burning powder.
Unusual Fire and Explosion Hazards(s): Dry powders of neodymium magnets will oxidize, smolder, and burn rapidly in the presences of air or oxygen. Maintain powders in water slurry or in inert atmospheres of nitrogen or argon to prevent spontaneous combustion. Magnets may spark on impact. Handle carefully in explosive atmospheres.
Hide Section 5 - Reactivity Data
Stability: Stable
Conditions to Avoid: Avoid exposure of powdered magnet material to air, oxygen or halogenated hydrocarbons, and to elevated temperatures above 150 Degrees Celsius.
Incompatibility (Materials to Avoid): Fine powders are incompatible with air, oxygen, halogentated hydrocarbons with strong oxidizers
Hide Section 6 - Health Hazard Data
Health Hazards (Acute & Chronic): Prolonged skin contact may cause irritation or allergenic dermatitis.
Emergency and First Aid Procedures:
Procedure ForProcedure
Skin
Brush off powders and wash well with soap and water.
Eyes
Flush with water until clear.
Hide Section 7 - Precautions for Safe Handling and Use
Spill Procedure: Sweep up dust and store in water slurry or sealed containers utilizing inert atmosphere such as argon or nitrogen to prevent spontaneous combustion.
Waste Disposal Method: Dispose of in accordance with federal, state and local regulations.
Hide Section 8 Control Measures
Respiratory Protection: Use NIOSH approved respirator when TLV is exceeded.
Eye Protection: Use safety glasses or goggles when handling magnets.
Skin Protection: Potective gloves are recommended when handling magnetized part or parts which may have sharp edges.
Ventilation: Use wet machining/grinding processes and adequate local ventilation to reduce dust levels
Work / Hygienic Practices: Use personal protection equipment when required. Use good personal hygiene practices. Keep magnetized parts away from mechanical/electrical instruments which may be damaged by high magnetic fields.
WARNING: RARE EARTH MAGNETS ARE EXTREMELY POWERFUL! They have very strong magnetic forces which make them attract to other magnets and other ferromagnetic materials such as iron or steel. HANDLE WITH EXTREME CAUTION!