Product information

Material properties of radially oriented, anisotropic Nd-Fe-B ring magnets (NEOQUENCH-DR)

Magnetic properties

  ND-31HR ND-31SHR ND-35HR
Remanence, Br (T) 1.14 ~ 1.22
1.08 ~ 1.18
1.22 ~ 1.28
(kG) (11.4 ~ 12.2) (10.8 ~ 11.8) (12.2 ~ 12.8)
Coercivity,HCB (kA/m) 830 ~ 890
810 ~ 880
870 ~ 940
(kOe) (10.4 ~ 11.2) (10.2 ~ 11.1) (10.9 ~ 11.8)
Coercivity,HCJ (kA/m) 1110 ~ 1430
1590 ~ 1990
1110 ~ 1430
(kOe) (14.0 ~ 18.0) (20.0 ~ 25.0) (14.0 ~ 18.0)
Maximum energy product, (BH)max (kJ/m3) 240 ~ 270
230 ~ 260
270 ~ 300
(MGOe) (30.0 ~ 34.0) (29.0 ~ 33.0) (34.0 ~ 38.0)
Recoil permeability 1.05 1.05 1.05
Required magnetizing magnetic field (kA/m) ≧1990
≧2390
≧1990
(kOe) (≧25) (≧30) (≧25)
density (Mg/m3) 7.6 7.7 7.6
(g/cm3)
  ND-35SHR ND-39R ND-39HR ND-43R
Remanence, Br (T) 1.22 ~ 1.28
1.28 ~ 1.32
1.28~1.32 1.30 ~ 1.36
(kG) (12.2 ~ 12.8) (12.8 ~ 13.2) (12.8~13.2) (13.0 ~ 13.6)
Coercivity,HCB (kA/m) 880 ~ 950
880 ~ 960
928~960 840 ~ 960
(kOe) (11.1 ~ 11.9) (11.1 ~ 12.1) (11.6~12.1) (10.5 ~ 12.1)
Coercivity,HCJ (kA/m) 1430 ~ 1800
1040 ~ 1280
1110~1430 900 ~ 1160
(kOe) (18.0 ~ 22.6) (13.0 ~ 16.0) (14.0~18.0) (11.3 ~ 14.6)
Maximum energy product, (BH)max (kJ/m3) 270 ~ 300
300 ~ 330
300~330 320 ~ 360
(MGOe) (34.0 ~ 38.0) (38.0 ~ 42.0) (38.0~42.0) (40.0 ~ 45.0)
Recoil permeability 1.05 1.05 1.05 1.05
Required magnetizing magnetic field (kA/m) ≧1990
≧1990
≧1990 ≧1990
(kOe) (≧30) (≧25) (25) (≧25)
density (Mg/m3) 7.6 7.6 7.6 7.6
(g/cm3)

The above properties are not guaranteed for magnets with thick walls. Please consult with us for details.

Other properties

Temperature coefficient of Br, alpha %/℃ -0.10
Temperature Coefficient of HCJ, beta %/℃ -0.50
Curie temperature 360
Specific heat J/kg℃ 550
Thermal conductivity W/m℃ 4.80
Thermal expansion coefficient (20 ~ 200℃) ×10-6/℃ 1 ~ 2(Radial direction)
-1 ~ 0(Axial direction)
Electric resistivity ×10-8Ωm 135
Ring crushing strength MPa 150
Young's modulus MPa 152000
Bending strength MPa 200
Vickers hardness Hv 750

Product dimemsions

Graph: product dimemsionsEnlarge

Graph: product dimemsionsEnlarge