Sintered Radial Neodymium Iron Boron

Sintered radial neodymium info-icon iron boron ring magnets are oriented by radial alignment of powders. It can be straight, skew or unipole magnetized. There are two production methods - sintered powder or hot press (MQ3) method. Compared to traditional arc magnets or IPM (internal permanent magnet) assemblies, radial rings can improve motor performance and increase yields over traditional motor assembly methods. These magnets are widely used in DC brushless and servo motors for robotic and automotive applications.

Product Information

Magnetic Characteristics

Grade	Br (Residual Induction) - mT	Br (Residual Induction) - KGs	Hcb (Coercive Force) - KA/m	Hcb (Coercive Force) - KOe	Hcj (Intrinsic Coercive Force) - KOe	Hcj (Intrinsic Coercive Force) - KA/m	Bhmax (Maximum Energy Product) - KJ/m³	Bhmax (Maximum Energy Product) - MGOe
N35	1.18-1.23	11.8-12.3	868	10.9	12	955	263-287	33-36
N38	1.23-1.26	12.3-12.6	899	11.3	12	955	287-311	36-39
N40	1.26-1.29	12.6-12.9	907	11.4	12	955	302-327	38-41
N42	1.29-1.33	12.9-13.3	915	11.5	12	955	318-342	40-43
N35H	1.18-1.23	11.8-12.3	868	10.9	17	1353	263-287	33-36
N38H	1.23-1.26	12.3-12.6	899	11.3	17	1353	287-311	36-39
N40H	1.26-1.29	12.6-12.9	923	11.6	17	1353	302-327	38-41
N42H	1.29-1.33	12.9-13.3	955	12.0	17	1353	318-342	40-43
N35SH	1.18-1.23	11.8-12.3	876	11.0	20	1592	263-287	33-36
N38SH	1.23-1.26	12.3-12.6	907	11.4	20	1592	287-311	36-39
N40SH	1.26-1.29	12.6-12.9	939	11.6	20	1592	302-326	38-41
N33UH	1.14-1.18	11.4-11.8	852	10.7	25	1989	247-271	31-34
N35UH	1.18-1.23	11.8-12.3	860	10.8	25	1989	263-287	33-36
HP40H	1.26-1.29	12.6-12.9	923	11.6	17	1353	302-327	38-41
HP35SH	1.18-1.23	11.8-12.3	876	11.0	20	1592	263-287	33-36
HP33UH	1.14-1.18	11.4-11.8	852	10.7	25	1989	247-271	31-34

Composition Characteristics

Auxiliary Characteristics

Thermal Characteristics

Mechanical/Physical Characteristics

Chemical Characteristics

Preferred Geometry

Comparison Chart

Grade BH Curves

Grade	Type of Material	Isotropic/Anisotropic
N35	Sintered NdFeB	Anisotropic
N38	Sintered NdFeB	Anisotropic
N40	Sintered NdFeB	Anisotropic
N42	Sintered NdFeB	Anisotropic
N35H	Sintered NdFeB	Anisotropic
N38H	Sintered NdFeB	Anisotropic
N40H	Sintered NdFeB	Anisotropic
N42H	Sintered NdFeB	Anisotropic
N35SH	Sintered NdFeB	Anisotropic
N38SH	Sintered NdFeB	Anisotropic
N40SH	Sintered NdFeB	Anisotropic
N33UH	Sintered NdFeB	Anisotropic
N35UH	Sintered NdFeB	Anisotropic
HP40H		Anisotropic
HP35SH		Anisotropic
HP33UH		Anisotropic

SDS

Section 1 - Product Name

Product Name: Sintered Neodymium Iron Boron (NdFeB) Permanent Magnet

Section 2 - Hazardous Ingredients

Chemical Name: Sintered Neodymium Iron Boron (NdFeB) Permanent Magnet

Material/Component(s):

Material or Component	Weight %	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

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

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.

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

Section 6 - Health Hazard Data

Health Hazards (Acute & Chronic): Prolonged skin contact may cause irritation or allergenic dermatitis.

Emergency and First Aid Procedures:

Procedure For	Procedure
Skin	Brush off powders and wash well with soap and water.
Eyes	Flush with water until clear.

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.

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!

Sintered Radial Neodymium Iron Boron

Product Information

Sintered Neodymium Iron Boron (NdFeB) Permanent Magnet

Feedback