Arnold Magnetic Technologies - Cast Alnico Properties

TABLE OF PROPERTIES : 2, 3, 4 • • 5, 5CC, 6, 800, 800 Hi Hc • • 8B, 8HE, 8H, 9

TEMPERATURE EFFECTS CURVES : 2, 3, 4 • • 5, 5CC, 6, 800, 800 Hi Hc • • 8B, 8HE, 8H, 9

CAST ALNICO PROPERTIES
Typical Values at 20^°C

	ALNICO GRADE
Magnetic Properties	5	5CC	6	ArKomax 800	ArKomax 800 Hi-Hc
*Maximum Energy Product (BHmax.)*
MGOe	5.50	6.50	3.90	8.10	8.10
kJ/m³	43.8	51.7	31.0	64.5	64.5
*Residual Induction (Br)*
Gauss	12500	13200	10800	13700	13200
mT	1250	1320	1080	1370	1320
*Required Magnetizing Field*
Oersteds	3000	3000	3000	3000	3000
kA/m	240	240	240	240	240
*Coercive Force (Hc)*
Oersteds	640	675	750	740	810
kA/m	51	54	60	59	64
*Recoil Permeability (µ_r)*
G/Oe	3.7	2.4	5.6	2.0	2.0
mT/(kA/m)	4.6	3.0	7.0	2.5	2.5
*Permeance Coefficient at BH Max.*
G/Oe	19.0	18.5	14.0	18.0	15.5
mT/(kA/m)	24.0	23.0	17.5	22.5	19.5
*Induction @ Max. Energy Product*
Gauss	10000	11000	7400	12000	11200
mT	1000	1100	740	1200	1120
*Curie Temperature (Tc)*
°C	900	900	860	900	900
*Reversible Temperature Coefficients*
Induction (Br)	0.02	0.02	0.02	0.02	0.02

Material Properties	5	5CC	6	ArKomax 800	ArKomax 800 Hi-Hc
*Density*
Lbs/in.³	0.264	0.264	0.265	0.264	0.264
g/cc	7.31	7.31	7.34	7.31	7.31
*Electrical Resistivity at 25ºC*
µOhms • cm per cm²	47	47	50	47	47
*Tensile Strength*
psi	5500	5200	23000	5000	5000
N/mm²	40	35	160	35	35
*Transverse Modulus of Rupture*
psi	10000	9000	45000	8000	8000
N/mm²	70	60	310	55	55
*Coefficient of Thermal Expansion*
per ºC x 10⁶	11.5	11.5	11.4	11.5	11.5
*Rockwell Hardness*
R_C	50	50	50	50	50