Position: Home >> Products
NdFeB Magnet
NdFeB magnet is mainly made of Neodymium, Iron and Boron,with excellent magnetic property, abundant raw material and reasonable prices, NdFeB Magnet can be used as an ideal magnet in mini-motor, Permanent magnet instrument, electronic industry, auto industry, petro-Chemical industry, nuclear magnetic resonance, sound device magnetic suspension system,magnetic transmission machine and iatrical apparatus and etc. For NdFeB, its surface is usually treally treatd with some special methods.
The surface treatment method include Zine, Nickel, Tin, Silver, Gold plating, Phosphor and Spray Epoxy Resin etc.
NdFeB magnet is mainly made of Neodymium, Iron and Boron,with excellent magnetic property, abundant raw material and reasonable prices, NdFeB Magnet can be used as an ideal magnet in mini-motor, Permanent magnet instrument, electronic industry, auto industry, petro-Chemical industry, nuclear magnetic resonance, sound device magnetic suspension system,magnetic transmission machine and iatrical apparatus and etc. For NdFeB, its surface is usually treally treatd with some special methods.The surface treatment method include Zine, Nickel, Tin, Silver, Gold plating, Phosphor and Spray Epoxy Resin etc.
| Surface | Type | Minimal layer thickness | Surface Color | Remarks |
| Passivation | <=1µ | Silver grey | Temperary Protection | |
| Nickel coating | Ni+Ni | 10-20µ | Silver semibright | Excellent resistance to humid atmosphere |
| Ni+Cu+Ni | Superior resistance to humid atmosphere | |||
| Zinc coating | Zn | 8-20µ | Blue whiteshining color shining | Good resistance to salt spray |
| C-Zn | Excellent resistance to salt spray | |||
| Tin coating | Ni+Cu+Sn | 15-20µ | Silver semibright | Superior resistance to humid atmosphere |
| Gold coating | Ni+Cu+Au | 10-20µ | Gold shining | Superior resistance to humid atmosphere |
| Cupper coating | Ni+Cu | 10-20µ | Gold shining | Temporary treatment |
| Epoxy | Ni+Cu+Epoxy | 15-25µ | Black | Excellent climatic and salt spray resistance |
| Zn+Epoxy | ||||
| Chemical Coating | Ni | 10-20 | Silver semibright | Excellent resistance to humid atmosphere |
NdFeB Physical Properties
| Temp.Coeff.of Br: | -0.11% / •C | Temp.Coeff.of iHc: | -0.60% / •C |
| Density: | 7.4-7.6g/cm3 | Curie Temperature: | 310-340•C |
| Vickers Hardness: | 600HV | Electrical Resistivity: | 144 |
| Tensile Strength: | 8kg/mm2 | Flexural Strength: | 25kg/mm |
| Specific Heat: | 0.12kcal/(kg.•C) | Coef.of Thermal Expansion: | 4x10-6 |
| Thermal conductivity: | 7.7kcal/m.h.•C | ||
| Youngs Modulus: | 1.6x1011N/m2 | Rigidity: | 0.64N/m2 |
| Poissons Ratio: | 0.24 | Compressibility: | 9.8x10-12 m2/N |
Ferrite Magnet
Ferrite magnets are ceramics that are stronger by weight than steel or Alnico equivalents but less so than neodymium magnets. Like all ceramics, they are quite brittle & will easily break if dropped onto a hard surface. They are an economical choice for use with conveyor belts to extract stray metal.
Ferrite magnets are also good for doing repulsion and attraction experiments since some of the rare earth magnets may be too strong and steel bar magnets will demagnetize. The plain ferrites shown below are all magnetized through their thickness.
Ferrite magnets are ceramics that are stronger by weight than steel or Alnico equivalents but less so than neodymium magnets. Like all ceramics, they are quite brittle & will easily break if dropped onto a hard surface. They are an economical choice for use with conveyor belts to extract stray metal. Ferrite magnets are also good for doing repulsion and attraction experiments since some of the rare earth magnets may be too strong and steel bar magnets will demagnetize. The plain ferrites shown below are all magnetized through their thickness.
| Material name | Y30BH | HF28/28 | FB6H | Y30H-1[C-8] | Y30H-2 | Y36 | C-8B | C-8C | |
| Compound SrO6Fe2O3 | |||||||||
| Left magnet density Br | [MT] | >=380 | >=385 | >=390 | >=385 | >=400 | >=410 | >=420 | >=430 |
| [KG] | >=3.8 | >=3.85 | >=3.9 | >=3.85 | >=4.0 | >=4.1 | >=4.2 | >=4.3 | |
| Magnetic induction coercive force Hcb | [KA/m] | >=224 | >=270 | >=267 | >=235 | >=275 | >=220 | >=230 | >=200 |
| [Koe] | >=2.8 | >=3.4 | >=3.3 | >=2.95 | >=3.45 | >=2.76 | >=2.8 | >=2.5 | |
| Inner coercive force Hcj | [KA/m] | >=232 | >=280 | >=315 | >=245 | >=310 | >=225 | >=240 | >=205 |
| [Koe] | >=2.9 | >=3.5 | >=3.9 | >=3.07 | >=3.89 | >=2.85 | >=3.0 | >=2.5 | |
| Max magnet energy [BH]max | [KJ/m3] | >=27.25 | >=28 | >=29.8 | >=30.02 | >=31.6 | >=31.6 | >=32.5 | >=34.2 |
| [KGOe] | >=3.1 | >=3.5 | >=3.7 | >=3.8 | >=4.0 | >=4.0 | >=4.1 | >=4.3 | |
| Relative reversion magnet ratio urec | 1.05~1.1 | 1.05~1.1 | 1.05~1.1 | 1.05~1.1 | 1.05~1.1 | 1.05~1.1 | 1.05~1.1 | 1.05~1.1 | |
| Left temperature coefficient Br/rB/T |
(%K) | -0.18 | -0.18 | -0.18 | -0.18 | -0.18 | -0.18 | -0.18 | -0.18 |
| [%C] | -0.18 | -0.18 | -0.18 | -0.18 | -0.18 | -0.18 | -0.18 | -0.18 | |
| Courier temperature Tc |
(K) | 733 | 733 | 733 | 733 | 733 | 733 | 733 | 733 |
| [C] | 460 | 460 | 460 | 460 | 460 | 460 | 460 | 460 | |
| Hot inflated coefficient L/LT |
C//*(1/K) [1/C] |
(9~9.5) x10-6 |
(9~9.5) x10-6 |
(9~9.5) x10-6 |
(9~9.5) x10-6 |
(9~9.5) x10-6 |
(9~9.5) x10-6 |
(9~9.5) x10-6 |
(9~9.5) x10-6 |
| C?*(1/K) [1/C] |
10x10-6 | 10x10-6 | 10x10-6 | 10x10-6 | 10x10-6 | 10x10-6 | 10x10-6 | 10x10-6 | |
| Specific heat |
(J/Kg.K) | 837 | 837 | 837 | 837 | 837 | 837 | 837 | 837 |
| [Cal/gC] | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | |
| Sinter density | (Kg/m3) | (4.85~5.0) x103 | (4.85~5.0) x103 |
(4.85~5.0) x103 | (4.85~5.0) x103 | (4.85~5.0) x103 | (4.85~5.0) x103 | (4.85~5.0) x103 |
(4.85~5.0) x103 |
| (g/m3) | 4.85~5.0 | 4.85~5.0 | 4.85~5.0 | 4.85~5.0 | 4.85~5.0 | 4.85~5.0 | 4.85~5.0 | 4.85~5.0 | |
| Anti-fold intensity | (N/m2) |
(0.5~0.9) x108 |
(0.5~0.9) x108 |
(0.5~0.9) x108 | (0.5~0.9) x108 | (0.5~0.9) x108 | (0.5~0.9) x108 | (0.5~0.9) x108 |
(0.5~0.9) x108 |
| (Kgf/mm2) | 5~9 | 5~9 | 5~9 | 5~9 | 5~9 | 5~9 | 5~9 | 5~9 | |
| Compressed intensity | (N/m2) | >6.9x108 | >6.9x108 | >6.9x108 | >6.9x108 | >6.9x108 | >6.9x108 | >6.9x108 | >6.9x108 |
| (Kgf/mm2) | >70 | >70 | >70 | >70 | >70 | >70 | >70 | >70 | |
| Cut intensity | (N/m2) | (0.2~0.5) x108 | (0.2~0.5) x108 |
(0.2~0.5) x108 | (0.2~0.5) x108 | (0.2~0.5) x108 | (0.2~0.5) x108 | (0.2~0.5) x108 |
(0.2~0.5) x108 |
| (Kgf/mm2) | 2~5 | 2~5 | 2~5 | 2~5 | 2~5 | 2~5 | 2~5 | 2~5 | |
Cast AlNiCo Magnet
Cast Alnico is a metal alloy consisting of aluminum, nickel, cobalt, iron and other trace elements of metal. With the different metal compositions of Magnetic material, its magnetic performance and purpose are also different. There are two kinds of production techonology to make an AlNiCo PM: casting and sintering. Different sizes and shapes could be processed through casting techonology. Compared with casting technology, sintered products are all small sizes and the tolerance of roughcast is smaller with better casting machinability. Cast Alnico PM has the minimum reversible tempeture coefficient, and its operating temperature can be as high as 600 degrees above. AlNiCo PM products are widely used in all kinds of instruments and other fields.
Cast Alnico is a metal alloy consisting of aluminum, nickel, cobalt, iron and other trace elements of metal. With the different metal compositions of Magnetic material, its magnetic performance and purpose are also different. There are two kinds of production techonology to make an AlNiCo PM: casting and sintering. Different sizes and shapes could be processed through casting techonology. Compared with casting technology, sintered products are all small sizes and the tolerance of roughcast is smaller with better casting machinability. Cast Alnico PM has the minimum reversible tempeture coefficient, and its operating temperature can be as high as 600 degrees above. AlNiCo PM products are widely used in all kinds of instruments and other fields.| Equivalent MMPA Class |
Grade | Remanence | Coercive Force | Max.energy product | Density | Rev. Temp. Coef. | Curie Temp. | Max. operating Temp. | ||||
| Br | Hc | (BH)max | D | Br | Hc | Tc | Tw | |||||
| mT | KGs | KA/M | Oe | KJ/m3 | MGOe | g/cm3 | %/C | %/C | C | C | ||
| ALNICO 3 | LN9 | 680 | 6.8 | 30 | 380 | 9.0 | 1.13 | 6.9 | -0.03 | -0.02 | 810 | 450 |
| ALNICO 2 | LNG12 | 720 | 7.2 | 45 | 500 | 12.4 | 1.55 | 7.0 | -0.03 | -0.02 | 810 | 450 |
| LNG13 | 700 | 7.0 | 48 | 600 | 12.8 | 1.60 | 7.0 | -0.03 | -0.02 | 810 | 450 | |
| ALNICO 5 | LNG37 | 1200 | 12.0 | 48 | 600 | 37.0 | 4.65 | 7.3 | -0.03 | -0.02 | 810 | 525 |
| LNG40 | 1250 | 12.5 | 48 | 600 | 40.0 | 5.00 | 7.3 | -0.02 | +0.02 | 860 | 525 | |
| LNG44 | 1250 | 12.5 | 52 | 650 | 44.0 | 5.50 | 7.3 | -0.02 | +0.02 | 860 | 525 | |
| ALNICO 5DG | LNG52 | 1300 | 13.0 | 56 | 700 | 52.0 | 6.50 | 7.3 | -0.02 | +0.02 | 860 | 525 |
| ALNICO 5-7 | LNG60 | 1350 | 13.5 | 59 | 740 | 60.0 | 7.50 | 7.3 | -0.02 | +0.02 | 860 | 525 |
| ALNICO 6 | LNGT28 | 1000 | 10.0 | 58 | 720 | 28.0 | 3.50 | 7.3 | -0.02 | +0.03 | 860 | 525 |
| ALNICO 8HC | LNGT36J | 700 | 7.0 | 140 | 1750 | 36.0 | 4.50 | 7.3 | -0.025 | +0.02 | 860 | 550 |
| ALNICO 8 | LNGT18 | 580 | 5.8 | 100 | 1250 | 18.0 | 2.20 | 7.3 | -0.025 | +0.02 | 860 | 550 |
| ALNICO 8 | LNGT32 | 800 | 8.0 | 100 | 1250 | 32.0 | 4.00 | 7.3 | -0.025 | +0.02 | 860 | 550 |
| LNGT40 | 800 | 8.0 | 110 | 1380 | 40.0 | 5.00 | 7.3 | -0.025 | +0.02 | 860 | 550 | |
| ALNICO 9 | LNGT60 | 900 | 9.0 | 110 | 1380 | 60.0 | 7.50 | 7.3 | -0.025 | +0.02 | 860 | 550 |
| LNGT72 | 1050 | 10.5 | 112 | 1400 | 72.0 | 9.00 | 7.3 | -0.025 | +0.02 | 860 | 550 | |
SmCo Magnet
SmCo magnet is a high performance, low temperature coefficent permanent magnet made of samarium and cobalt and other rare-earth elements. Its biggest advantage is its high working temperature----300 degree centigrade. It neednt to be coated because it is difficult to be eroded and oxidized. SmCo magnet is widely used in motors, watch, transducers, instruments, positional detector, generators, radar and etc.
SmCo magnet is a high performance, low temperature coefficent permanent magnet made of samarium and cobalt and other rare-earth elements. Its biggest advantage is its high working temperature----300 degree centigrade. It neednt to be coated because it is difficult to be eroded and oxidized. SmCo magnet is widely used in motors, watch, transducers, instruments, positional detector, generators, radar and etc.| Material | Code | Remanence Br | Coercivity Force | Intrinsic Coercivity Force | Max. Energy Product Bhm | Curie Temperature | Max. Operating Temperature | ||||
| T | KGs | KA/m | KOe | KA/m | KOe | KJ/m3 | MGOe | C | C | ||
| Sintered | |||||||||||
| SmCo(1:5) | YX-18 | 0.75-0.9 | 8.5-9.0 | 620-648 | 7.8-8.2 | 1194-1513 | 15-19 | 127-143 | 16-18 | 750 | 250 |
| YX-20 | 0.92-0.96 | 9.2-9.6 | 653-717 | 8.2-9.0 | 1194-1513 | 15-19 | 150-167 | 19-21 | 750 | 250 | |
| YX-24 | 0.96-1.0 | 9.6-1.0 | 730-770 | 9.2-9.7 | 1194-1513 | 15-19 | 175-190 | 22-24 | 750 | 250 | |
| SmCo(2:17) | YXG-24 | 0.95-1.02 | 9.5-10.2 | 637-732 | 8.0-9.2 | 1433-1990 | 18-25 | 175-190 | 22-24 | 800 | 300 |
| YXG-26 | 1.02-1.05 | 10.2-10.5 | 748-796 | 9.4-10.0 | 1433-1990 | 18-25 | 195-215 | 24-26 | 800 | 300 | |
| YXG-28 | 1.05-1.08 | 10.5-10.8 | 756-796 | 9.5-10.0 | 1433-1831 | 18-25 | 205-220 | 26-28 | 800 | 300 | |
| YX-28B | 1.02-1.10 | 10.2-11.0 | 420 | 5.2-5.6 | 440-520 | 5.5-6.5 | 205-220 | 26-28 | 800 | 300 | |
| YXG-30 | 1.08-1.10 | 10.8-11.0 | 780 | 9.8-10.5 | 1433-1831 | 18-25 | 220-240 | 28-30 | 800 | 300 | |
| YXG-30B | 1.08-1.15 | 10.8-11.5 | 420 | 5.2-5.6 | 440-520 | 5.5-6.5 | 220-240 | 28-30 | 800 | 300 | |
| Bonded | |||||||||||
| SmCo(1:5) | YB-6 | 0.4 | 4.0 | 280 | 3.5 | 800 | 10 | 30-50 | 4-6 | - | 120 |
| YB-10 | 0.5 | 5.0 | 320 | 4.0 | 800 | 10 | 50-65 | 6-8 | - | 120 | |
| SmCo(2:17) | YBG-10 | 0.6 | 6.0 | 360 | 4.5 | 800 | 10 | 65-80 | 8-10 | - | 120 |
| YBG-12 | 0.7 | 7.0 | 400 | 5.0 | 800 | 10 | 80-95 | 10-12 | - | 120 | |
Rubber Magnet
Rubber magnet is made of ferric oxide, rubber and some other trace elements. It can be used in refrigerator doors, sheet magnets for toys and teaching materials.
Rubber magnet is made of ferric oxide, rubber and some other trace elements. It can be used in refrigerator doors, sheet magnets for toys and teaching materials.| Code | Remanence Br | Coercivity Force | Intrinsic Coercivity Force | Max. Energy Product Bhm | Temperature Coefficient | Operating Temperature | ||||
| mT | KGs | KA/m | KOe | KA/m | ROe | KJ/m3 | NGOe | C | C | |
| Yn-5 | 170 | 1.7 | 96 | 1.2 | 191 | 24 | 4.8 | 0.6 | -0.18 | -40--+100 |
| Yn-8 | 200 | 2.0 | 143 | 1.8 | 207 | 26 | 8.0 | 1.0 | -0.18 | -40--+100 |
| Yn-10 | 230 | 2.3 | 159 | 2.0 | 207 | 26 | 9.6 | 1.2 | -0.18 | -40--+100 |
| Yn-12 | 245 | 2.45 | 169 | 2.12 | 247 | 31 | 11.9 | 1.5 | -0.18 | -40--+100 |
Flexible Magnet
Introducing FlexIRON, the unique, versatile, flexible, ferrous material that attracts magnets. It looks like flexible magnetic sheeting, yet it is not a magnet. It is a magnetically receptive material that attracts all types of low profile magnets, including flexible and ceramic magnets. Either surface attracts magnets. It is easy to drill or cut with scissors, knife, die, or punch.
Introducing FlexIRON, the unique, versatile, flexible, ferrous material that attracts magnets. It looks like flexible magnetic sheeting, yet it is not a magnet. It is a magnetically receptive material that attracts all types of low profile magnets, including flexible and ceramic magnets. Either surface attracts magnets. It is easy to drill or cut with scissors, knife, die, or punch.| P/N | Length | Width | Thickness | Density(g/cm³) | |||
| Specification | Tolerance | Specification | Tolerance | Specification | Tolerance | ||
| YD-1 | 1-20m | +/-200mm | 0.5-1m | +/-3mm | 0.4-1mm | +/-0.07mm | 4.0-4.6 |
| YD-2 | 0.1-0.7m | +/-2mm | <=0.38m | +/-2mm | 0.4-1mm | +/-0.1mm | 4.8 |
Magnetic Assemblies
Ningbo YiLi Magnet Co.,Ltd always tries our best to provide different holding magnets, such as square. Disc and Ring Holding Magnets, Hard Ferrite (ceramic), Alnico, NdFeB and SmCo assemblies are specified for many applications to all industries and engineering. All commercially available permanent magnet materials can be utilized. Including ceramic, Alnico, NdFeB and SmCo magnet in mild steel housing. Capabilities include shaping magnets vis slicing and dicing, centerless and surface grirding, and edge deburring, Assembly Operations include gluing, potting with epoxy, plating (Nickel-plating, Zinc-Plating0,paint coating and magnetic testing, optional rubber can be filled to produce an even surface. Magnetic assemblies are up to 32 times stronger than magnets by themselves. Magnetic assembly are widely used in such devices as motors, sensors, solenoid actuators, holding and clamping fixtures. Including automobiles, elevtronic instrumentation oil field explation and ultrasonic transducers.
Ningbo YiLi Magnet Co.,Ltd always tries our best to provide different holding magnets, such as square. Disc and Ring Holding Magnets, Hard Ferrite (ceramic), Alnico, NdFeB and SmCo assemblies are specified for many applications to all industries and engineering. All commercially available permanent magnet materials can be utilized. Including ceramic, Alnico, NdFeB and SmCo magnet in mild steel housing. Capabilities include shaping magnets vis slicing and dicing, centerless and surface grirding, and edge deburring, Assembly Operations include gluing, potting with epoxy, plating (Nickel-plating, Zinc-Plating0,paint coating and magnetic testing, optional rubber can be filled to produce an even surface. Magnetic assemblies are up to 32 times stronger than magnets by themselves. Magnetic assembly are widely used in such devices as motors, sensors, solenoid actuators, holding and clamping fixtures. Including automobiles, elevtronic instrumentation oil field explation and ultrasonic transducers.
