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NdFeB Magnet
NdFeB MagnetNdFeB 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 MagnetFerrite 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 MagnetCast 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 MagnetSmCo 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 MagnetRubber 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
Flexible MagnetIntroducing 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
Magnetic AssembliesNingbo 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.
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