Permanent Cast Alnico Magnets with Customized Shape

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Product Detail

Among those famous cast alnico magnets manufacturers, it is a professional supplier in China, welcome to wholesale alnico magnet for guitar pickup, alnico 5 magnets, alnico permanent magnets, alnico v magnets, alnico bar magnets from our factory.

Customized Cast Alnico Magnets

Alnico material is comprised of aluminum, nickel, cobalt and iron with varying additions of other elements. There are two different manufacturing processes for Alnico: Cast and sintered.


Cast Alnico magnets can be made into many shapes and sizes during manufacturing process by using the casting processing method. Cast Alnico magnets are manufactured by pouring the molten metal alloy of Alnico into a mold and then further processing it through heat treated and cooled alternatively. The solidified material has a dark gray appearance on the exterior and may be roughly ground. Magnets that have been polished using machines, may have a shiny gray surface similar to that of steel.


Specification

Dimension                  

Tolerance

Up to 1" Up to 25.4 mm        

±1/64" .40 mm

1" to 3" 25.4 to 76.2 mm   

±1/32" .81 mm

3" to 5" 76.2 to 127.0 mm       

±3/64" 1.19 mm

5" to 7" 127.0 to 177.8 mm      

±1/16" 1.59 mm

7" to 9" 177.8 to 228.6 mm      

±5/64" 1.98 mm


Advantages of Alnico Magnets

· Cast Alnico offers a near net shape. 

· Cast alnico can be produced to complex shapes with complex magnetic patterns.  

· Alnico Br as high as NdFeB at room temperature.

· Can be used up to 450-550 degrees C (842-932F). 

· Least variation in magnetic output with temperature change of any magnetic material. 

· Can be cast in very large sizes.


Production Properties:

  Magnetic Property Parameters of Sintered Alnico

Grades

Equivalent MMPA Class

Remanence

Coercive Force

Coercive Force

Maximum Energy Product

Dens

ity

Reversible Temp. Coefficient

Curie Temp.

Temp. Coefficient

Br

Hcb

Hcb

(BH)max

g/

cm3

a(Hcj)

TC

TW

mT

Gs

KA/m

Oe

KA/m

Oe

KJ/m3

MGOe

%/°C

°C

°C

SLN8

Alnico3

520

5200

43

540

40

500

8-10

1.0-1.25

6.8

-0.02

760

450

SLNG12

Alnico2

700

7000

43

540

40

500

12-14

1.5-1.75

7

-0.014

810

450

SLNGT18

Alnico8

600

6000

107

1350

95

1200

18-22

2.25-2.75

7.2

-0.02

850

550

SLNGT28

Alnico6

1000

10000

57

710

56

700

28-30

3.5-3.8

7.2

-0.02

850

525

SLNG34

Alnico5

1100

11000

51

640

50

630

34-38

3.5-4.15

7.2

-0.016

890

525

SLNGT31

Alnico8

780

7800

106

1130

104

1300

33-36

3.9-4.5

7.2

-0.02

850

550

SLNGT38

800

8000

126

1580

123

1550

38-42

4.75-5.3

7.2

-0.02

850

550

SLNGT42

880

8800

122

1530

120

1500

42-48

5.3-6.0

7.25

-0.02

850

550

SLNGT38J

Alnico8HC

730

7300

163

2050

151

1900

38-40

4.75-5.0

7.2

-0.02

850

550


Our regular sizes for reference:

Alnico Magnets - Physical Properties

Property

Units

Value Sintered Alnico

Value Cast Alnico

Vickers Hardness

Hv

440

440-620

Density

g/cm3

6.8 - 7.0

6.9 - 7.3

Curie Temp TC

°C

810 - 860

740 - 860

Curie Temp TF

°F

1,400 - 1,580

1,460 - 1,580

Specific Resistance

µO·Cm

50- 70

45 - 75

Bending Strength

kN/mm2

0.35 - 0.76

0.05 - 0.31

Tensile Strength

kN/mm2

0.35- 0.45

0.02 - 0.15

Thermal Expansion

°C-1

+11.0 to +12.4 x10-6

+11.0 to +13.0 x10-6

Note:
     The listed values are approximate and should be used as a reference. Any magnetic or physical characteristics should be substantiated before selecting a magnet material. Please engage GME’s Design / Development team members before selecting a design path.

 Cylinder

Grade

Dimensions

Application

A(mm)

B(mm)

LNG40

1.57

9.525

Micro-motors

LNG40

1.7

12

Micro-motors

LNG40

3.175

12.7

Micro-motors

LNG40

4

15

Sensors

LNG40

5

10/15/17/18/20/25.4

Sensors

LNG40

6

25/30/100

Sensors

LNG40

6.35

25.4/31.75

Sensors

LNG40

7

30

Sensors

LNG40

8

20/25/30/50/150

Sensors

LN10

9

5

Sensors

LNG40

9.525

25.4/38.1/63.5

Sensors

LNG40

10

10/12/15/30/140

Sensors

LNG52

10

28

Sensors

LN10

10.4

8

Meters

LNG40

11

50

Sensors

LNG40

12

30/50

Sensors

LNG40

12.7

50.8/76.2

Cows

LNG40

25

20

Assembly

LNG52

38

16

Balances

Ring

Grade

Dimensions

Applications

A(mm)

B(mm)

LN10

23

4

Odometers

LN10

25

5

Odometers

LN10

23

3.5

Odometers

LNG13

51

5

Meters

LNG13

218

10

Port Machines

LN10

142

9

Port Machines

LNG40

101.6

40

Speakers

LNG40

50.8

25.4

Motors

LNG40

101.6

38.1

Speakers

Block1

Grade

Dimensions

Application

A

B

C

D

E

Blenders

LNG37

42

20

30

10

Meters

LNG37

55

11

13.4

16

Education

LNG37

28.6

7.6

25.4

8

Holding

LNG37

30

20

20

7.5

D5

Holding

LNG37

45

30

30

11

D5

Holding

LNG37

25.4

15.9

5.6

D4.8

Holding

LNG37

19.05

12.7

5.6

D4.8

Holding

LNG37

31.75

25.4

7.94

D7.1

Holding

LNG37

40

25

25

10

Holding

LNG37

39.6

25.4

25.4

10.3

D5.5

Holding

LNG37

63.5

47.6

46

14.3

D4.8

Holding

LNG37

69.8

57.1

41.3

14.3

2XD7.9

Holding

LNG37

64

12

26

14

Holding

LNG37

17

22

10

6.25

Meters

LNG37

62

26

61

13

Education

LNG37

21

13.1

16.2

6.2

Meters

Block2

Grade

Dimensions

Application

A

B

C

D

LNG37

63.5

12.7

3.175

Musical Instruments

LNG37

58

12.6

3

Musical Instruments

LNG37

60

12.7

3

Musical Instruments

LNG37

25.4

6.35

6.35

Sensors

LNG37

22.5

4.3

4.3

Sensors

LNG44

69

25

25

15

Magnetic Chucks

LNG37

62

13

3

Musical Instruments

LNG40

75

15

10

Education

LNG37

19

3.2

3.2

Sensors

LNG37

150

16

6

Education

LNG40

25

22.5

7

Meters

LNG40

25

22

7

R4

Meters

LNG40

42

42

20

6.5

Magnetic Chucks

LNG37

45

20

15

7

Magnetic Chucks

LNG37

50

20

20

7

Magnetic Chucks

LNGT72

50

50

40

Magnetic Chucks

LNG52

45

24

15

Magnetic Chucks

LNG52

45

22.5

15

Magnetic Chucks

LNG44

59.5

59.5

25

11

Magnetic Chucks

LNG40

45

18.5

30.5

Magnetic Bases

LNG40

53

19.3

32

Magnetic Bases


Applications 

Mainly used for a variety of Meter, Odometer, Sensors, Motors, Multimeter, Telephone, Mobile, Watermeter, Eletricitymeter, Switch, Adhesion, Loudspeakers Port machines, Musical instruments, Magnetic chucks, Educations, Magnetic Bases etc.


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