Cast AlNiCo Magnets

The majority of AlNiCo magnets are cast type. Cast AlNiCo magnets are manufactured by conventional foundry processes. AlNiCo alloys with different composition are melted and poured into the resin bonded sand molds, then solidified material with a rough surface will undergo heat treatment and cooling process. Cast AlNiCo magnets can be divided to the isotropic form and anisotropic form base on whether apply the magnetic field to orient magnets during the cooling process. For cast AlNiCo magnet, its anisotropy is a kind of shape anisotropy which associated with elongated Fe-Co particles in a Ni-Al matrix aligned parallel to the magnetic field during spinodal decomposition of the alloy. Therefore, material will be machined to specific geometry and tolerance after heat treatment process.

Cast AlNiCo Magnets-Main

Manufacturing Process of Cast AlNiCo Magnets

Cast AlNiCo Magnets-Process

Magnetic Properties of Cast AlNiCo Magnets

Grade Remanence

Br

Coercivity

Hcb

Max. Energy Product

(BH)max

Temp. Coefficient

Tk

Curie Temp. Max. Operating Temperature MMPA Equivalent
mT Gs kA/m Oe kJ/m3 MGOe %/℃

(Br)

%/℃

(Hcj)

LN10 600 6000 40 500 10 1.2 -0.02 -0.03 810 450 AlNiCo3
LNG12 700 7000 44 550 12 1.5 -0.02 -0.03 810 450 AlNiCo2
LNG13 680 6800 48 600 13 1.63 -0.02 -0.03 810 450
LNG18 900 9000 48 600 18 2.25 -0.02 -0.03 850 450 AlNiCo4
LNG37 1200 12000 48 600 37 4.63 -0.02 -0.03 860 525 AlNiCo5
LNG40 1250 12500 48 600 40 5 -0.02 -0.03 860 525
LNG44 1250 12500 52 650 44 5.5 -0.02 -0.03 860 525
LNG52 1300 13000 56 700 52 6.5 -0.02 -0.03 860 525 AlNiCo5DG
LNG60 1330 13300 60 750 60 7.5 -0.02 -0.03 860 525 AlNiCo5-7
LNGT18 580 5800 90 1130 18 2.25 -0.02 -0.03 860 550 AlNiCo7
LNGT28 1000 10000 58 720 28 3.5 -0.02 -0.03 860 525 AlNiCo6
LNGT32 800 8000 100 1250 32 4 -0.02 -0.03 860 550 AlNiCo8
LNGT38 800 8000 110 1380 38 4.75 -0.02 -0.03 860 550
LNGT44 850 8500 120 1500 44 5.5 -0.02 -0.03 860 550
LNGT48 900 9000 120 1500 48 6 -0.02 -0.03 860 550
LNGT60 950 9500 110 1380 60 7.5 -0.02 -0.03 860 550
LNGT72 1050 10500 112 1500 72 9 -0.02 -0.03 860 550 AlNiCo9
LNGT88 1100 11000 115 1450 88 11 -0.02 -0.03 860 550
LNGT36J 700 700 140 1750 36 4.5 -0.02 -0.03 860 550 AlNiCo8HC
  • The above-mentioned data of magnetic properties and physical properties are given at room temperature.
  • The max working temperature of magnet is changeable due to length-diameter ratio, coating thickness and other environment factors.