Alliance N-40M Neodymium Iron Boron Magnetic Material

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Alliance N-40M Neodymium Iron Boron Magnetic Material
Categories:	Metal; Electronic/Magnetic Alloy; Ferrous Metal
Material Notes:	Neodymium magnets (NdFeB or Neo), are the most commonly used magnet materials for high tech motors and sensors. They are popular due to their high magnetic strength and resistance to demagnetization. They do not have the high temperature resistance of other magnet materials, however they can be used in applications with maximum operating temperatures of 220°C. Because of a high iron content, they will corrode over time if not plated or coated. As with all magnet materials, NdFeB should never be used as a structural element in an application.
Key Words:	NdFeB; Neo, Magnet, Magnets
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Physical Properties	Original Value	Comments

Density	>= 7.50 g/cc
	7.50 - 7.80 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Vickers	570 - 580
Tensile Strength	12000 psi
Tensile Strength, Ultimate	80.0 MPa
Modulus of Elasticity	150 - 160 GPa
	22000 ksi
Flexural Strength	180 - 270 MPa
Compressive Strength	850 - 1050 MPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000120 - 0.000160 ohm-cm
	0.000160 ohm-cm @Temperature 20.0 °C
Magnetic Coercive Force, H_c	11600 Oe
	11800 - 13800 Oe
	14000 Oe	Intrinsic
	14000 - 20000 Oe	Intrinsic
Magnetic Remanence, B_r	12700 Gauss
	12600 - 12900 Gauss
Magnetic Maximum Energy Product, BH	38 - 41 MGOe
	38 - 41 MGOe
Curie Temperature	310 °C
	320 °C

Thermal Properties	Original Value	Comments
CTE, linear	-4.80 µm/m-°C	Perpendicular to M
	3.40 µm/m-°C	Parallel to M
	5.00 µm/m-°C @Temperature 20.0 °C	Parallel DOM
CTE, linear, Transverse to Flow	-1.00 µm/m-°C @Temperature 23.0 °C	Perpendicular to M
Specific Heat Capacity	0.440 J/g-°C
Thermal Conductivity	9.00 W/m-K
Maximum Service Temperature, Air	100 °C
	<= 100 °C	Continuous

Descriptive Properties
Reversible Temperature Coefficients	-0.12	α Br. %/°C
	-0.65	β Hcj. %/°C

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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