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Product Introduction

AlNiCo alloys basically consist of aluminum, nickel, cobalt, copper, iron and titanium. In some grades cobalt and/or titanium can be omitted. Also these alloys may contain additions of silicon, columbium, zirconium or other elements which enhance heat treatment response of one of the magnetic characteristics. AlNiCo alloys are formed by casting or powder metallurgical processes.

Characteristics
  • AlNiCo magnets are very good at temperature properties. Its temperature coefficient is very low, so the change of magnetic properties is low under high temperature. The maximum working temperature can be as high as 400 °C
  • The coercive force of AlNiCo magnets is also very low, so it can be easily effected by reverse magnetic force and impact of iron. This means that they can be easily demagnetized by external influences. For this reason, AlNiCo magnets should not be stored and packed with the same poles opposing to each other.
  • In open circuit, the ration of length/diameter (L/D) should be at least 4:1. With shorter length, AlNiCo magnets are unstable in open circuit.
  • AlNiCo magnets have good corrosion resistance characteristic. No coating is needed for surface protection.
Applications
  • Instruments
  • Meters
  • Mobile Phones
  • Odometers
Magnetic Property for Cast Alnico

Grade Br
KGs (mT)
Hcj
Oe (KA/m)
BHmax
MGOe(KJ/m3)
D
g/cm3
MMPA
Class
α %/°C
Br (Hcj)
TC
°C/°F
TMax
°C/°F
*LN9 6.8(680) 380 (30) 1.13 (9.0)

6.9

Alnico3 -0.03 (-0.02) 810/1490 450/842
*LN10 6.0(600) 500 (40) 1.20 (10.0) 6.9 Alnico3 -0.03 (-0.02) 810/1490 450/842
*LNG12 7.2(720) 500 (45) 1.55 (12.4) 7.0 Alnico2 -0.03 (-0.02) 810/1490 450/842
*LNG13 7.0(700) 600 (48) 1.60 (12.8) 7.0 Alnico2 -0.03 (-0.02) 810/1490 450/842
LNG37 12.0(1200) 600 (48) 4.65 (37.0)

7.3

Alnico5 -0.02 (+0.02) 860/1580 525/977

LNG40

12.5(1250) 600 (48) 5.00 (40.0) 7.3 Alnico5 -0.02 (+0.02) 860/1580 525/977
LNG44 12.5(1250) 650 (52) 5.50 (44.0) 7.3 Alnico5 -0.02 (+0.02) 860/1580 525/977
LNG52 13.0(1300) 700 (56) 6.50 (52.0) 7.3 Alnico5DG -0.02 (+0.02) 860/1580 525/977
LNG60 13.5(1350) 740 (59) 7.50 (60.0) 7.3 Alnico5-7 -0.02 (+0.02) 860/1580 525/977
LNGT28 10.0(1000) 720 (58) 3.50 (28.0) 7.3 Alnico5 -0.02 (+0.03) 860/1580 525/977
LNGT36J 7.0(700) 1750 (140) 4.50 (36.0) 7.3 Alnico8HC -0.025(+0.02) 860/1580 550/1022
*LNGT18 5.8(580) 1250 (100) 2.20 (18.0) 7.3 Alnico8 -0.025(+0.02) 860/1580 550/1022
LNGT32 8.0(800) 1250 (100) 4.00 (32.0) 7.3 Alnico8 -0.025(+0.02) 860/1580 550/1022
LNGT40 8.0(800) 1380 (110) 5.00 (40.0) 7.3 Alnico8 -0.025(+0.02) 860/1580 550/1022
LNGT60 9.0(900) 1380 (110) 7.50 (60.0) 7.3 Alnico9 -0.025(+0.02) 860/1580 550/1022
LNGT72 10.5(1050) 1400 (112) 9.00 (72.0) 7.3 Alnico9 -0.025(+0.02) 860/1580 550/1022
* = Isotropic, Others = An-isotropic

Magnetic Property for Sintered Alnico

Grade Br
KGs (mT)
Hcj
Oe (KA/m)
Hcb
Oe (KA/m)
BHmax
MGOe(KJ/m3)
D
g/cm3
α %/°C TC
°C/°F
*FLN8 5.2(520) 540 (43) 500 (40) 1.0-1.25 (8-10)

6.8

-0.022 760/1400
*FLNG12 7.0(700) 540 (43) 500 (40) 1.5-1.75 (12-14) 7.0 -0.014 810/1490
*FLNGT14 5.7(570) 980 (78) 950 (76) 1.75-2.0 (14-16) 7.1 -0.020 850/1562
*FLNGT18 5.6(560) 1130 (90) 1100 (88) 2.25-2.75 (18-22) 7.2 -0.020 850/1562
FLNG28 10.5(1050) 590 (47) 580 (46) 3.5-4.15 (28-33)

7.2

-0.016 850/1562

FLNG34

11.0(1100) 640 (51) 630 (50) 4.3-4.8 (34-38) 7.2 -0.016 890/1562
FLNGT28 10.0(1000) 710 (57) 700 (56) 3.5-3.8 28-30) 7.2 -0.020 850/1562
FLNGT31 7.8(780) 1130 (106) 1300 (104) 3.9-4.5 (33-36) 7.2 -0.020 850/1562
FLNG33J 6.5(650) 1880 (150) 1700 (136) 4.15-4.5 (31-36) 7.2 -0.020 850/1562
FLNGT38 8.0(800) 1580 (126) 1550 (123) 4.75-5.3 (38-42) 7.2 -0.020 850/1562
FLNGT42 8.8(880) 1530 (122) 1500 (120) 5.3-6.0 (42-48) 7.25 -0.020 850/1562
* = Isotropic, Others = An-isotropic