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Olive shape alnico magnet , customized irregular alnico magnet with permanent casting

Material:Cast alnico magnet
Grade: alnico 2-alnico 9
Size:Typical dimensions and customized
Magnetism direction: Customized Specific Requirements
Tolerances: Cast surface +/-0.38-+/-0.5 mm
Ground surface +/-0.01-+/-0.1 mm

Quantity:
  • DunBen

Product Details:

Alnico magnets, composed of primarily aluminum, nickel, and cobalt, were developed in the 1940's. This class of magnet remains a preferred material because of it's excellent temperature stability, high magnetic flux density, and resistance to corrosion. Alnico magnets are manufactured through a casting or sintering process. The casting process allows for the magnet to be manufactured into intricate and complex shapes, which are not possible with other magnetic materials.

Material Item NdFeB SmCo AlNiCo Ferrite
Magnetic Energy 30-52 MGOe           16-32 MGOe 1.2-10 MGOe 1-3.5 MGOe           
Max Working Temp. 80-200°C 350°C 550°C 250°C
Production Method Sintered Sintered Cast or Sintered Sintered
Surface Coating Yes No No No
Machining Property Middle Low Middle Low
Cost High High Middle Low
Main Application Motor, Speaker, 
Meter, Sensor, 
MRI, Separator, 
etc.
Aviation, 
Spaceflight, 
Motor, Sensor, 
Medical instrument, 
etc.
Sensor, 
Musical instrument, 
Speaker, Meter, 
Motor, etc.
Motor, Speaker,    
Toy, Craft, e
Key Advantages

Sintered Alnico Magnets:

· Excellent temperature stability

· Strong corrosion resistance

· Fine grain

· Compact crystal.

· Excellent magnetic consistence and evenness.

· Suitable for small volume and complex shape magnets.

Cast Alnico Magnets:

· Excellent temperature stability

· Strong corrosion resistance

· Excellent capacity

· High density and magnetic properties

· Shorter production lead time

· Temperature factor of Br is the smallest among all the permanent magnets

· Cast Alnico magnets can be produced in relatively complex shapes

· Tooling for cast Alnico magnets is relatively low, since sand molds are generally used for the casting process.

CUSTOM ALNICO MAGNET SHAPES

Alnico Magnets can customize any magnet shape. We work with you to personalize your magnets for your application. Common magnet shapes include:

  • Rods
  • Bars
  • Assemblies
  • Horseshoe
  • C-shaped
  • Cynlinders
  • Rings
  • Channels
  • Olive
  • Bullet

Applications:

1) Inner magnetic voltmeter/ammeter, measuring instrument, avometer, flow meter.
2) Magnetic sensors, polarized relay, terperature and pressure controller.
3) Buzzer of mobile phone, hearing aids, mini speaker
4) Lighter of automobile, odometer of automobile and motorcycle, permanent motor, adsorptive appliance
5) Widely applied in high stability field as aviation, space flight and military technologhy
In addition, due to the good corrosion resistance characteristic, non-coating is need for surface protection.
 

Typical Magnetic Properties
 

Grade MMPA Equivalent Br Hcb Hcj (BH)max Remark
mT Gs kA/m Oe kA/m Oe kJ/m3 MGOe
LN10 Alnico3 600 6000 40 500 43 540 10 1.20 Isotropic
LNG13 Alnico2 680 6800 48 600 51 640 13 1.60
LNGT18 Alnico8 580 5800 90 1130 92 1160 18 2.20
LNG37 Alnico5 1200 12000 48 600 49 610 37 4.65 Anisotropic
LNG40 1250 12500 48 600 49 610 40 5.00
LNG44 1250 12500 52 650 53 660 44 5.50
LNG52 Alnico5DG 1300 13000 56 700 57 710 52 6.50
LNG60 Alnico5-7 1350 13500 59 740 60 750 60 7.50
LNGT28 Alnico6 1000 10000 58 720 59 740 28 3.50
LNGT36J Alnico8HC 700 7000 140 1750 148 1850 36 4.50
LNGT38 Alnico8 800 8000 110 1380 112 1400 38 4.75
LNGT44 880 8800 120 1500 122 1530 44 5.50
LNGT60 Alnico9 900 9000 110 1380 112 1400 60 7.50
LNGT72 1050 10500 112 1400 114 1430 72 9.00

 

Cast Alnico Process Chart
Raw material -> forming- >smelting-> heat treatment-> surface treatment->precision grinding->inspection ->packing
Sintered Alnico Process Chart
Raw material ->powder-> forming-> sintered- >heat treatment-> surface treatment->precision grinding –>inspection- >packing

 

CONTACT US

  Hang Zhou XiaoShan Dunben Magnet  Co., Ltd 
 1702, Unit 2, Building 1, Dacheng Mingzuo, Shiixn Road, Xiaoshan, Hangzhou, Zhejiang, China
  86-571-82750965 
  86-571-82751287
 wang@dbmagnet.com
 

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