Cast & Sintered Alnico Magnets

Group Alnico Magnets
Min. Order 1 piece
Terms of Payment all
Update Time 2018-12-06
Item specifics
MaterialCast AlNiCo ,Sintered AlNiCo
ShapeAny shape Can be customized
CoatingNi, Ni-Cu-Ni, Electroless Nickel, Zinc, Colored Zinc, Epoxy
Magnetized directionAxially or Diametrical Magnetized, but Thickness, Multipoles and Radial magnetization are also available
CertificateISO/TS 16949, ISO9001, ISO14001, RoHS, REACH
PackingStandard sea or air packing, such as carton, wooden box, pallet etc.
Description

Alnico is an acronym referring to a family of iron alloys which in addition to iron are composed primarily of aluminium (Al), nickel (Ni) and cobalt (Co), hence al-ni-co. They also include copper, and sometimes titanium. Alnico alloys are ferromagnetic, with a high coercivity (resistance to loss of magnetism) and are used to make permanent magnets. Before the development of rare earth magnets in the 1970s, they were the strongest type of magnet. Other trade names for alloys in this family are: Alni, Alcomax, Hycomax, Columax, and Ticonal.

The composition of alnico alloys is typically 8–12% Al, 15–26% Ni, 5–24% Co, up to 6% Cu, up to 1% Ti, and the balance is Fe. The development of alnico began in 1931, when T. Mishima in Japan discovered that an alloy of iron, nickel, and aluminum had a coercivity of 400 oersted (Oe; 32 kA/m), double that of the best magnet steels of the time.

AlNiCo can be divided to cast AlNiCo and sintered AlNiCo. When compared with cast AlNiCo, sintered AlNiCo perform with lower magnetic properties but better mechanical properties. AlNiCo are brittle and hard, not suitable for traditional maching processes except grinding processing.

铸造铝镍钴磁性能参数

Cast  AlNiCo  Magnetic  Property  Table

 

牌号

Grade

分类

MMPA

CLASS

剩磁 Br

Residual Induction

磁感矫顽力

Coercive Force

最大磁能积 (BH)max

Max Energy Product

居里温度

Curie temperature

工作温度

Working Temperature

Br

Hcb

( BH ) max

(Tc)

Tw

 

mT

(kGs)

kA/m

(kOe)

kJ/m3

(MGOe)

[℃]

[℃]

Typ.

Typ.

Typ.

 

 

LN10

 

ALNICO3

600

6000

40

500

10

1.25

750

550

LNG10

600

6000

44

550

10

1.25

750

550

LNG12

 

ALNICO2

700

7000

44

550

12

1.5

800-850

550

LNG13

680

6800

48

600

13

1.63

800-850

550

LNG16

 

ALNICO4

800

8000

48

600

16

2.00

800-850

550

LNG18

900

9000

48

600

18

2.25

800-850

550

LNG37

 

 

ALNICO5

1200

12000

48

600

37

4.63

800-850

550

LNG40

1230

12300

48

600

40

5.00

800-850

550

LNG44

1250

12500

52

650

44

5.50

800-850

550

LNG48

 

ALNICO5DG

1280

12800

56

700

48

6.00

800-850

550

LNG52

1300

13000

56

700

52

6.50

800-850

550

LNG56

 

ALNICO5-7

1300

13000

58

720

56

7.00

800-850

550

LNG60

1330

13300

60

750

60

7.50

800-850

550

LNGT28

 

ALNICO6

1000

10000

56

700

28

3.50

800-850

550

LNGT30

1100

11000

56

700

30

3.75

800-850

550

LNGT18

 

 

ALNICO8

580

5800

80

1000

18

2.25

800-850

550

LNGT32

800

8000

100

1250

32

4.00

800-850

550

LNGT38

800

8000

110

1380

38

4.75

800-850

550

LNGT44

850

8500

115

1450

44

5.50

800-850

550

LNGT48

ALNICO8HE

900

9000

120

1500

48

6.00

800-850

550

LNGT60

 

 

 

ALNICO9

900

9000

110

1380

60

7.50

800-850

550

LNGT72

1050

10500

112

1400

72

9.00

800-850

550

LNGT80

1080

10800

120

1500

80

10.00

800-850

550

LNGT88

1100

11000

115

1450

88

11.00

800-850

550

LNGT96

1150

11500

118

1480

96

12.00

800-850

550

LNGT36J

 

 

ALNICO8HC

700

7000

140

1750

36

4.50

800-850

550

LNGT48J

800

8000

145

1820

48

6.00

800-850

550

LNGT52J

850

8500

140

1750

52

6.50

800-850

550


铝镍钴磁性能参数

Sintered AlNiCo Magnetic Property Table

 

牌号

Grade

分类

MMPA

CLASS

剩磁 Br

Residual Induction

磁感矫顽力

Coercive Force

最大磁能积 (BH)max

Max Energy Product

居里温度

Curie temperature

工作温度

Working Temperature

Br

Hcb

( BH ) max

(Tc)

Tw

 

mT

(kGs)

kA/m

(kOe)

kJ/m3

(MGOe)

[℃]

[℃]

Typ.

Typ.

Typ.

FLN8

S.ALNICO3

500

5000

40

500

8

1.00

760

450

FLN12

S.ALNICO2

700

7000

48

600

12

1.5

810

450

FLNT18

S.ALNICO7

600

6000

90

1130

18

2.2

860

450

FLN34

S.ALNICO5

1200

12000

48

600

34

4.25

890

450

FLNT28

S.ALNICO6

1050

10500

56

700

28

3.5

850

450

FLNT38

S.ALNICO8

880

8800

120

1500

38

4.75

850

450

FLNT42

S.ALNICO8

880

8800

120

1500

42

5.25

850

450

FLNT33J

S.ALNICO8HC

700

7000

140

1750

33

4.13

850

450

Alnico magnets are manufactured either by casting or sintering. Alnico is produced by conventional foundry methods using resin bonded sand molds or powder metal manufacturing methods. Sintering Alnico is suitable for complex geometries. 

Most Alnico produced is anisotropic meaning that the magnetic axle of the grains is oriented in one direction. The orientation is achieved by a heat treatment process after casting or sintering.  The process involves heating the casting or sintered part above its Curie Temperature and then cooling it at a controlled rate in the presence of a directionalized magnetic field. Final shaping of the Alnico materials is achieved by abrasive grinding and cutting where close tolerances are required. 


Cast AlNiCo Manufacturing process



Sintered AlNiCo Manufacturing process


Physical Properties of Alnico magnets

Cast AlNiCo Demagnetisation Curve