Custom Industrial Neodymium Magnet,Precision Sintered Neodymium Magnets

Magnetic Properties of Sintered neodymium magnets

Grade	Br				HcB		Hcj		(BH) max				Recommend Maximum Working Temp
	kGs		T		kOe	kA/m	kOe	kA/m	MGOe		kJ/m³		L/D≥0.7
	Max	Min	Max	Min	Min	Min	Min	Min	Max	Min	Max	Min	°C
N30	11.2	10.8	1.12	1.08	≥10	≥796	≥12	≥955	31	28	247	223	≤80
N33	11.7	11.3	1.17	1.13	≥10.5	≥836	≥12	≥955	34	31	271	247	≤80
N35	12.1	11.7	1.21	1.17	≥10.9	≥868	≥12	≥955	36	33	287	263	≤80
N38	12.6	12.2	1.26	1.22	≥11.3	≥899	≥12	≥955	39	36	311	287	≤80
N40	12.9	12.6	1.29	1.26	≥11.6	≥923	≥12	≥955	41	38	327	302	≤80
N42	13.2	12.9	1.32	1.29	≥12	≥955	≥12	≥955	43	40	342	318	≤80
N45	13.7	13.3	1.37	1.33	≥12.5	≥955	≥12	≥955	46	43	366	342	≤80
N48	14.0	13.7	1.40	1.37	≥12.9	≥1027	≥12	≥955	49	46	390	366	≤80
N50	14.3	14.0	1.43	1.40	≥13.1	≥1043	≥12	≥955	51	48	406	382	≤80
N52	14.5	14.3	1.45	1.43	≥13.3	≥1138	≥11	≥876	53	50	422	398	≤70
N54	14.6	14.4	1.46	1.44	≥13.6	≥1150	≥11	≥876	55	52	438	414	≤70
N56	14.8	14.6	1.48	1.46	≥13.7	≥1160	≥11	≥876	57	54	454	430	≤70
30M	11.2	10.8	1.12	1.08	≥10.9	≥868	≥14	≥1114	31	28	247	223	≤100
33M	11.7	11.3	1.17	1.13	≥10.5	≥836	≥14	≥1114	34	31	271	247	≤100
35M	12.1	11.7	1.21	1.17	≥10.9	≥868	≥14	≥1114	36	33	287	263	≤100
38M	12.6	12.2	1.26	1.22	≥11.3	≥899	≥14	≥1114	39	36	311	287	≤100
40M	12.9	12.6	1.29	1.26	≥11.6	≥923	≥14	≥1114	41	38	327	302	≤100
42M	13.2	12.9	1.32	1.29	≥12.0	≥955	≥14	≥1114	43	40	342	318	≤100
45M	13.7	13.3	1.37	1.33	≥12.5	≥995	≥14	≥1114	46	43	366	342	≤100
48M	14.0	13.7	1.40	1.37	≥12.9	≥1027	≥14	≥1114	49	46	390	366	≤100
50M	14.3	14.0	1.43	1.40	≥13.1	≥1043	≥14	≥1114	51	48	406	382	≤100
52M	14.5	14.3	1.45	1.43	≥13.3	≥1138	≥14	≥1114	53	50	422	398	≤100
54M	14.6	14.4	1.46	1.44	≥13.6	≥1150	≥14	≥1114	55	52	438	414	≤100
30H	11.2	10.8	1.12	1.08	≥10	≥796	≥17	≥1353	31	28	247	223	≤120
33H	11.7	11.3	1.17	1.13	≥10.5	≥836	≥17	≥1353	34	31	271	247	≤120
35H	12.1	11.7	1.21	1.17	≥10.9	≥868	≥17	≥1353	36	33	287	263	≤120
38H	12.6	12.2	1.26	1.22	≥11.3	≥899	≥17	≥1353	39	36	311	287	≤120
40H	12.9	12.6	1.29	1.26	≥11.6	≥923	≥17	≥1353	41	38	327	302	≤120
42H	13.2	12.9	1.32	1.29	≥12.0	≥955	≥17	≥1353	43	40	342	318	≤120
45H	13.7	13.3	1.37	1.33	≥12.5	≥995	≥17	≥1353	46	43	366	342	≤120
48H	14.0	13.7	1.40	1.37	≥12.9	≥1027	≥17	≥1353	49	46	390	366	≤120
50H	14.3	14.0	1.43	1.40	≥13.0	≥1034	≥17	≥1350	51	48	406	382	≤120
52H	14.5	14.3	1.45	1.43	≥13.3	≥1138	≥17	≥1350	53	50	422	398	≤120
30SH	11.2	10.8	1.12	1.08	≥10.1	≥804	≥20	≥1592	31	28	247	223	≤150
33SH	11.7	11.3	1.17	1.13	≥10.6	≥844	≥20	≥1592	34	31	271	247	≤150
35SH	12.1	11.7	1.21	1.17	≥11.0	≥876	≥20	≥1592	36	33	287	263	≤150
38SH	12.6	12.2	1.26	1.22	≥11.4	≥907	≥20	≥1592	39	36	311	287	≤150
40SH	12.9	12.6	1.29	1.26	≥11.6	≥939	≥20	≥1592	41	38	326	302	≤150
42SH	13.2	12.9	1.32	1.29	≥12.4	≥987	≥20	≥1592	43	40	342	318	≤150
45SH	13.7	13.2	1.37	1.32	≥12.6	≥1003	≥20	≥1592	46	42	366	334	≤150
48SH	14.0	13.7	1.40	1.37	≥12.9	≥1027	≥20	≥1592	49	46	390	366	≤150
50SH	14.3	14.0	1.43	1.40	≥13.0	≥1034	≥20	≥1592	51	48	406	382	≤150
52SH	14.5	14.3	1.45	1.43	≥13.3	≥1138	≥20	≥1592	53	50	422	398	≤150
28UH	10.8	10.4	1.08	1.04	≥9.6	≥764	≥25	≥1989	29	26	231	207	≤180
30UH	11.2	10.8	1.12	1.08	≥10.1	≥804	≥25	≥1989	31	28	247	223	≤180
33UH	11.7	11.3	1.17	1.13	≥10.7	≥852	≥25	≥1989	34	31	271	247	≤180
35UH	12.1	11.7	1.21	1.17	≥10.8	≥860	≥25	≥1989	36	33	287	263	≤180
38UH	12.6	12.2	1.26	1.22	≥11.3	≥899	≥25	≥1989	39	36	311	287	≤180
40UH	12.9	12.6	1.29	1.26	≥11.3	≥899	≥25	≥1989	41	38	326	302	≤180
42UH	13.2	12.9	1.32	1.29	≥11.6	≥923	≥25	≥1989	43	40	342	318	≤180
45UH	13.7	13.3	1.37	1.33	≥12.5	≥995	≥25	≥1989	46	43	366	342	≤180
28EH	10.8	10.3	1.08	1.03	≥9.8	≥780	≥30	≥2388	29	26	231	207	≤200
30EH	11.2	10.8	1.12	1.08	≥10.1	≥804	≥30	≥2388	31	28	247	223	≤200
33EH	11.7	11.3	1.17	1.13	≥10.3	≥820	≥30	≥2388	34	31	271	247	≤200
35EH	12.1	11.7	1.21	1.17	≥10.5	≥836	≥30	≥2388	36	33	287	263	≤200
38EH	12.6	12.2	1.26	1.22	≥11.3	≥899	≥30	≥2388	39	36	311	287	≤200
40EH	12.9	12.5	1.29	1.25	≥11.3	≥899	≥30	≥2388	41	38	326	302	≤200
42EH	13.3	12.8	1.33	1.28	≥11.6	≥923	≥30	≥2388	43	40	342	318	≤200
45EH	13.7	13.2	1.37	1.32	≥12.5	≥995	≥30	≥2388	46	42	366	334	≤200
28AH	10.8	10.3	1.08	1.03	≥9.6	≥764	≥35	≥2785	29	26	231	207	≤230
30AH	11.2	10.8	1.12	1.08	≥9.6	≥764	≥35	≥2785	31	28	247	223	≤230
33AH	11.7	11.3	1.17	1.13	≥9.6	≥764	≥35	≥2785	34	31	271	247	≤230
35AH	12.1	11.7	1.21	1.17	≥9.6	≥764	≥35	≥2785	36	33	287	263	≤230
38AH	12.6	12.2	1.26	1.22	≥9.6	≥764	≥35	≥2785	39	35	311	278	≤230

Surface Coating Solution

Note: Corrosion Resistance varies with the shape of the product.

Coating Material	Thickness	Behaviour	Corrosion Resistance					Remark
Coating Material	Thickness	Behaviour	PCT	Salt Spray	Humidity & Temperature	Acid / Alkaline	Oil	Remark
Zn (White Zn)	≥ 5 µm	White	-----	♦♦	♦♦♦	-----	♦
Zn (Color Plated ZN)	≥ 5 µm	Iridescence	-----	♦♦♦	♦♦♦♦	-----	♦
Ni+Cu+Ni	≥ 15 µm	Sliver	♦♦♦	♦♦♦♦	♦♦♦♦♦	♦♦♦	♦♦♦
Ni+Cu+Ni+Sn	≥ 15 µm	Sliver	♦♦♦♦	♦♦♦♦	♦♦♦♦♦	-----	-----	Excellent performance in welding
Chemic Ni	≥ 5 µm	Sliver	♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦	♦♦♦
Epoxy	≥ 12 µm	Black or Grey	♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦	Poor wear resistance
Passivated	≤ 2 µm	Black or Grey	-----	-----	♦♦♦	-----	♦♦♦
Al	≥ 3 µm	Sliver Grey	♦♦♦♦	♦♦♦	♦♦♦♦	-----	♦♦♦	High performance in glue binding
Al+Epoxy	≥ 15 µm	Black or Grey	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	Poor wear resistance
Zn+Al	≥ 10 µm	Sliver or Sliver Grey	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	-----	♦♦♦♦♦
Everluber	≥ 5 µm	Gold	♦♦♦♦	♦♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦♦
Teflon	≥ 5 µm	Black	♦♦	♦♦♦	♦♦♦♦♦	♦♦♦♦♦	♦♦♦	Good wear resistance

Demagnetization Curve

Sintered neodymium magnets

Process Flow

Sintered neodymium magnets

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Sintered Neodymium

Sintered neodymium magnets are the world’s most powerful commercially available magnets, with energy products ranging from 33 to 52 MGOe. They offer an ideal solution for applications requiring strong, highly coercive magnets available in large quantities at a relatively low cost. Sintered neodymium magnets are widely used in consumer products like cell phones, speakers, fasteners, and toys, as well as in industrial applications such as metal detectors, oil filters, alternators, flow meters, and welding clamps. They are also essential in MRI machines, hybrid and electric vehicles, and wind turbines due to their high power and compact size. Sintered neodymium magnets come in various shapes—blocks, rings, arcs, discs, spheres, and more—with Ni-Cu-Ni plating being the most common coating, although other finishes are also available.   ∇ Most powerful permanent magnets  ∇ High performance at a low cost ∇ Excellent Demagnetization Resistance ∇ Options for standard and high-temperature materials ∇ Energy products exceeding 50 MGOe  

Injection Molded

Injection-molded magnets provide almost unlimited dimensional and magnetic flexibility. Made by blending magnetic materials (NdFeB, ferrite) with a polymer binder (typically nylon or PPS), these magnets can be molded just like plastic. They enable complex shapes and can be directly over-molded onto components like shafts or bushings, often removing the need for additional gluing or assembly. Injection molding is ideal for applications requiring high precision, complex shapes, and insert or over-molding. This process enables the rapid production of identical components, making it well-suited for high-volume manufacturing. Injection molded magnets are commonly used in magnetic sensors, brakes, and other applications. Exceptional tensile strength ensures high resistance to impact and rotational forces, along with excellent chemical resistance.   ∇ Versatile shapes and magnetization options ∇ NdFeB, SmCo, AlNiCo, and Ferrite materials available ∇ Ideal for large-scale applications ∇ High resistance to impact, rotational forces, and chemicals ∇ Maintain tight tolerances for precision  

Bonded Neodymium

Compression Bonded Neodymium Magnets offer exceptional versatility with multiple processing options, featuring strong mechanical properties and higher electrical resistivity than sintered magnets. Compression bonded neodymium magnets can be produced in complex shapes with precise geometric tolerances. Made from hard magnetic powder combined with a non-magnetic polymer or rubber binder, the powder can consist of materials like hard ferrite, alnico, or rare earth elements. Ideal for minimizing cogging torque in motors, compression bonded neodymium magnets are well-suited for high-volume applications. Their machinability makes them perfect for low-volume production as well, allowing for customized magnetizing patterns, including multipole or skewed poles. The epoxy binder in compression bonded neodymium magnets ensures strong resistance to industrial and automotive fluids and solvents, enhancing durability.    ∇ Strong magnetic performance ∇ Capable of achieving tight tolerances ∇ Excellent mechanical strength ∇ Resistant to corrosion and mild chemicals ∇ Isotropic, allowing magnetization in any direction ∇ Operating temperature range from -40˚C to 165˚C    

Magnetic Assemblies

Magnet assemblies are sophisticated systems that combine magnets with various materials, such as metals, ceramics, and polymers, to enhance magnetic performance and adapt to specific industrial applications. These assemblies are not merely a collection of magnets but rather an integrated unit designed to channel, focus, and control magnetic forces efficiently. By leveraging materials like steel, aluminum, or plastic in conjunction with the magnet, these assemblies enhance the magnetic field strength and durability while offering structural stability. We offer a wide range of magnetic assemblies and subassemblies, crafted from virtually any type of magnetic material or combination thereof. With advanced techniques like plastic injection molding and metal die casting, we can precisely integrate components such as spindles, bushings, gears, and other inserts. Additional fabrication methods, including press fitting, gluing, and over-molding, are also available to meet specific design and functional requirements.   Magnet assemblies offer versatile applications across a wide array of industries： Automotive In electric vehicles (EVs), magnet assemblies are used in electric motors, sensors, and actuators, enabling enhanced efficiency and precision in engine performance. Electronics Magnet assemblies enhance the performance of electronic components, from speakers to hard drives, by providing robust and reliable magnetic fields. Medical Devices Magnet assemblies are vital in medical technology, enhancing the reliability and precision of MRI machines, pacemakers, and surgical tools, ensuring stable performance in sensitive environments.   Renewable Energy In wind turbines and solar power systems, magnet assemblies are essential for energy generation, conversion, and storage.

Ferrite

Ferrite magnets are low-cost, lightweight permanent magnets with moderate energy levels and relatively high coercive strength, capable of operating at temperatures up to 480°F. They offer excellent corrosion resistance, making them ideal for high-volume applications in manufacturing and consumer products. Ferrite magnets are available in two types: isotropic and anisotropic. Isotropic ferrite magnets have lower magnetic properties due to their nearly uniform magnetic behaviour in all directions, allowing them to be magnetized in multiple directions or multi-poles. Anisotropic ferrite magnets have better magnetic properties. &diams; Cost-effective solution for high-volume applications &diams; Medium strength performance &diams; High-temperature resistance &diams; Available in both isotropic and anisotropic grades &diams; Corrosion-resistant for durability &diams; Capable of withstanding high temperatures up to 300°C &diams; Cost-effective solution for low Br requirements, up to 4.2 MGOe       Classification and applications of ferrite magnets Material Grades Main Applications Characteristics Shapes ZY10T Strip magnet for sensor, disk, apparatus, household appliance, electric motor, medical device, sensor Isotropic, material easy to multimagnetize by different direction, magnets with high precise dimension Strip, cylinder, ring, U-shape ZY20JZY20 Electric motors for water and oil pump, and other micro-brushless motor rotor Dry anisotropic products, multi-pole radial or full-eddy magnetic ring, high surface magnetic, stable performance characteristics Cylinder, Ring ZY25ZY30 All kinds of loudspeakers audio, electric-motor, medical device, sensor, receiver, pulling-system High-density, high and stable performance Ring, Cylinder, Block, Block and hole ZY33HZY34HZY4036 Electric motors for electric tools, magnetic motor for motorcycle, electric motors for Auto. Applications such as wiper, power window, magnetic pulling devices, household appliance, medical treatment device, sensors, ABS motor, starter motors for motorcycle, plane motor Moderate BR and Hcj, stable performance, strong capability in anti-demagnetization, extensive application Segment, Block, Ring, Cylinder ZY4129 High-quality loudspeakers, receivers, electric-motors for meters and instrument, magnetic adhesion, medical device, magnetic motor High Br & sensitivity, stable, excellent quality, high flux density Ring, Cylinder, Block ZY4229 Microwave oven Magnetron, high-quality loudspeakers, receivers, electric-motors for office-equipment, apparatus and instrument, micro-motor High Br and Hcb, high sensitivity stable, excellent quality, high flux density Ring, Cylinder, Segment, Block ZY3845ZY3850ZY4040ZY4350 Starter motors for automobile and for motorcycle, other motor for automobile, conditioning/ refrigerator compressor motor High Hcb and Hcj, with strong capability in anti-demagnetization and aging, wide temperature range Segment, Block ZY4240ZY4040ZY4545 Starter motors for automobile, Electric motors for auto application such as ABS, blower , wiper and electric shift motor and adjustable Pedal motor, electric motors for household appliance, compressors of air-conditioners and etc. higher Br and high flux density, with high power, stable performance, extensive application Segment, Ring, Block ZY4433ZY4646 Electric motors for oil pump and throttle of auto. as well as high -grade loudspeakers, meters, household appliance and office automation Higher Br with high sensitivity applying for micro-sized high performance motors Segment, Ring, Block ZY4654ZY4748 Starter motors for automobile, compressors of air-conditioner and refrigerator, electric motors for auto appliance such as ABS, power window, sunroofs and oil pump Higher Br and high flux, strong capability in anti-demagnetization, low temperature coefficient segment, Block  

AlNiCo

Alnico magnets are a group of permanent magnets composed mainly of aluminum (Al), nickel (Ni), and cobalt (Co), with iron (Fe) as a base metal. In addition to these primary elements, small amounts of other materials such as copper (Cu) and titanium (Ti) are often added to further enhance their magnetic properties. Alnico magnets stand out for their high temperature stability, maintaining approximately 85% of room-temperature magnetization up to 1,000°F. They offer strong residual induction, high energy products, and natural corrosion resistance, eliminating the need for surface treatments (though plating is an option). Alnico magnets can be manufactured through casting or sintering. While sintered alnico magnets are slightly less powerful than cast versions, they offer better mechanical properties. The sintering process is ideal for high-volume production, producing structurally stronger parts than cast magnets and achieving relatively close tolerances without the need for grinding.   ∇ Highly resistant to extreme temperatures, with operating temps exceeding 1000°F ∇ Lower coercive strength, easily demagnetized ∇ Strong corrosion resistance: Less susceptible to oxidation than other magnets ∇ Available in both cast and sintered forms  

Samarium Cobalt

Samarium-cobalt magnet is a kind of rare earth permanent magnet material with high temperature resistance, excellent thermal stability and high coercivity. The main raw materials of samarium-cobalt magnet are samarium and cobalt.The samarium-cobalt magnet with a certain shape is produced by furnace. powder manufacturing, pressing molding, sintering and precisely machining. Although the room temperature magnetic property of samarium-cobalt magnet is inferior to that of NdFeB magnet, its thermal stability is more than10 times that of NdFeB magnet. When the temperature exceeds 150C, the magnetic energy product, coercivity and thermal stability of samarium cobalt magnet all exceed that of NdFeB magnet. Samarium cobalt is the best permanent magnetic material with excellent thermal stability at present.    ∇ Low Cost  ∇ Strong Corrosion Resistance  ∇ Temperature range between 250°C and 550°C  ∇ Strong Demagnetization Resistance  ∇ High Corrosion Resistance; Highly resistant to oxidation     Typical Physical Properties of Samarium Cobalt Materials   Physical Characteristics unit SmCo5 Sm2Co17 Density g/cm3 8.1 - 8.6 8.2-8.5 Tc °C 750 850 Bending Strength MPa 120 - 180 80 - 160 Compressive Strength MPa 1000 - 1200 800 - 1200 Tensile Strength MPa 40 35 Fracture Toughness MPa • m1/2 1 - 2 1.5 - 2.5 Modulus of Elasticity MPa 1.3 x 105 2 x 105 Modulus of Rigidity MPa / 8 x 104 Poisson Ratio / / 0.2 HV / 400 - 500 500 - 650 Resistivity µΩ • cm 0.5 - 0.6 0.8 - 0.9 Thermal Conductivity W • (m •°C)-1 11 10 Specific Heat kJ (kg •°C)-1 0.37 0.35 Thermal Expansion Coefficient Lcaxis x10-6 K 7 8 Llc axis 15 11  