Magnets of Neodymium-Iron-Boron (NdFeB)

NdFeB Magnets belong to the group of rare-earth Magnets and have got a very high energy efficiency. The availability of raw material is relatively good and therefore the magnets are cheaper than equivalent SmCo products. NdFeB Magnete are very hard, but less brittle than magnets of SmCo. They are used in all types of applications, because systems like spee or motors can be build smaller and more efficient, because of their high energy density. The usage of an anti-corrosive protection is recommended if NdFeB Magnets are used in high-humidity environment. Usually they are zinc- or nickel plated after the production, but it is possible to aply other coatings like epoxyd, gold or tin.

rings

from ø 8 mm to ø 185 mm

cylinders

from ø 4 mm to ø 90 mm

blocks

from 1,2 mm to 150 mm

special designs

according to your requirements

We've got more than 150 different types on stock. Please ask for your requested design and size.

Physical and chemical characteristics

Curie-temperature: ~ 330 °C 
Specific electric resistance: 1,2 – 1,6 Ohm*mm²/m
Specific heat: ~ 440 J/(kg*K)
Thermal conductivity ~ 9 W/(m*k)
Extension Coefficient: 5 c 10-6/K
E-Modul  150 KN/mm²
Flexural strength:  ~ 270 N/mm²
Compressive strength:  ~ 1050 N/mm²
Vickers hardness: ~ 570 HV
Fracture toughness: Kic  70 - 90 MPa m0,5

Magnetical data

Material

Remanence

Energy Produkt

Coercivity field power

Working -

 

Br [mT]

BHmax [kJ/m3]

HcB [kA/m]

HcJ [kA/m]

temperature [°C]

 

min.

min.

min.

min.

max.

N271020199765>=95580
N301080223780>=95580
N331130247820>=95580
N351170263860>=95580
N371200279860>=95580
N401250303844>=95580
N431300326796>=87680
N451330342796>=87680
N501400398812>=87680
N30M1080223780>=1114100
N33M1130247820>=1114100
N35M1170263860>=1114100
N37M1200279860>=1114100
N40M1250303844>=1114100
N48M1370358859>=1114100
N27H1020199765>=1353120
N30H1080223780>=1353120
N32H1120239820>=1353120
N35H1170263860>=1353120
N37H1200279915>=1353120
N40H1250303915>=1353120
N46H1350438859>=1353121
N48H1370448859>=1353122
N27SH1020199765>=1595150
N30SH1080223780>=1595150
N32SH1120239820>=1595150
N35SH1170263860>=1595150
N42SH1300398859>=1592151
N44SH1330418859>=1592152
N25UH970183748>=1910160
N28UH1040207780>=1910160
N30UH1080223804>=1910160
N38UH1220348835>=1990160
N40UH1260378835>=1990160
N35EH1170328835>=2398180
N38EH1220348835>=2389180

Surface Protection and Coating

Surface
Type
Thickness (min.) [µm]
NickelNi + Ni
Ni + Cu + Ni
10 - 20
ZincZn
C-Zn
8 - 20
Tin Ni + Cu + Sn15 - 20
GoldNi + Cu + Au10 - 20
CopperNi + Cu10 - 20
EpoxyNi + Cu + Epoxy
Zn + Epoxy
15 - 25
Chem. NickelNi10 - 20

Other Types of Magnets