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.

contact

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.
N27	1020	199	765	>=955	80
N30	1080	223	780	>=955	80
N33	1130	247	820	>=955	80
N35	1170	263	860	>=955	80
N37	1200	279	860	>=955	80
N40	1250	303	844	>=955	80
N43	1300	326	796	>=876	80
N45	1330	342	796	>=876	80
N50	1400	398	812	>=876	80
N30M	1080	223	780	>=1114	100
N33M	1130	247	820	>=1114	100
N35M	1170	263	860	>=1114	100
N37M	1200	279	860	>=1114	100
N40M	1250	303	844	>=1114	100
N48M	1370	358	859	>=1114	100
N27H	1020	199	765	>=1353	120
N30H	1080	223	780	>=1353	120
N32H	1120	239	820	>=1353	120
N35H	1170	263	860	>=1353	120
N37H	1200	279	915	>=1353	120
N40H	1250	303	915	>=1353	120
N46H	1350	438	859	>=1353	121
N48H	1370	448	859	>=1353	122
N27SH	1020	199	765	>=1595	150
N30SH	1080	223	780	>=1595	150
N32SH	1120	239	820	>=1595	150
N35SH	1170	263	860	>=1595	150
N42SH	1300	398	859	>=1592	151
N44SH	1330	418	859	>=1592	152
N25UH	970	183	748	>=1910	160
N28UH	1040	207	780	>=1910	160
N30UH	1080	223	804	>=1910	160
N38UH	1220	348	835	>=1990	160
N40UH	1260	378	835	>=1990	160
N35EH	1170	328	835	>=2398	180
N38EH	1220	348	835	>=2389	180

Surface Protection and Coating

Surface	Type	Thickness (min.) [µm]
Nickel	Ni + Ni Ni + Cu + Ni	10 - 20
Zinc	Zn C-Zn	8 - 20
Tin	Ni + Cu + Sn	15 - 20
Gold	Ni + Cu + Au	10 - 20
Copper	Ni + Cu	10 - 20
Epoxy	Ni + Cu + Epoxy Zn + Epoxy	15 - 25
Chem. Nickel	Ni	10 - 20