CASTING

Item Unit Alnico-5 Alnico-8 Alnico Sinter
Compositon 8Al-14Ni-24Co-3Cu-othersFe 7Al-15Ni-34Co-4Cu-othersFe 8Al-14Ni-24Co-3Cu-othersFe
Molding Process Casting Casting Wet Powder
in Magnetic Field
Residual Flux Density
Br
mT 1250 to1300 830 to 900 1150
kG 12.5 to 13 8.3 to 9.0 11.5
Coercive Force
bHc
kA/m 47.7 to 52.5 110 to 123 50
KOe 0.60 to 0.66 1.38 to 1.55 0.65
Intrinsic Coercive Force
iHc
kA/m
KOe
Maximum Energy Product
(BH) max
kJ/m2 38.2 to 43.8 38.2 to 43.0 37
MGOe 4.8 to 5.5 4.8 to 5.4 4.6
Temperature Coefficent Br %/K -0.02 -0.02 -0.02
Temperature Coefficent iHc %/K  
Curie Point
Tc
K 1123 1123 1123
°C 850 850 850
Recoil Relative Magnetic
Permeability
μrec
3.6 3.6 3.6
Density g/cm2 7.3 7.3 7.1
Deflecting Strength Mpa 73.5 73.5 73.5
Kgf/mm2 7.5 7.5 7.5
Compression Strength Mpa
Kgf/mm2
Tensile Strength Mpa 37.2 37.2 37.3
Kgf/mm2 3.8 3.8 3.8
Specific Heat J/ (Kg•K)
cal/g°C
Vickers Hardness HV 650 650 650
Thermal Expansion Coefficient
Lateral
ppm/K 11 11 11
Thermal Expansion Coefficient
Vertical
ppm/K 11 11 11
JIS AlNiCo37/5 AlNiCo38/11 AlNiCo S-34/5
MMPA AlNiCO-5 AlNiCO-8
Magnetic Field To Be Charged
For Magnetization
kA/m 240 640 240
KOe 3.0 8.0 3.0
Electric Resistance nΩm 4.7x102 4.7x102 47x102