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PRODUCT
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Phone:022-87897560
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Email:info@north-magnet.cc
Fax: 022-87897562
Address: Floor 5, No. 4, Xinxing Park, Houtai Industrial Park, Xiqing District, Tianjin City
Neodymium iron boron
Product Introduction:
Sintered neodymium–iron–boron (NdFeB) permanent magnetic materials were introduced in the early 1980s, with a composition of Nd₂Fe₁₄B. Thanks to their outstanding performance, abundant raw material availability, and competitive pricing, NdFeB magnets have experienced rapid development and widespread application. They are now extensively used in micro‑motors, loudspeakers, toys, permanent‑magnet instruments, the electronics industry, the automotive sector, the petrochemical industry, nuclear magnetic resonance equipment, magnetic levitation systems, magnetic drive mechanisms, and magnetic therapy devices, among others. NdFeB magnets are prone to rusting and oxidation; therefore, their surfaces typically undergo electroplating treatments such as zinc, nickel, gold, or silver plating. Alternatively, phosphating or epoxy coating can be applied to slow down the oxidation process. These magnets exhibit exceptionally high magnetic properties, with a maximum energy product more than ten times that of ferrite magnets. They also possess excellent mechanical strength, allowing them to be cut into various shapes and drilled. High‑performance grades can operate at temperatures up to 230°C.
Product Features:
| Made by powder metallurgy. | Extremely hard and brittle |
| High demagnetization resistance | Without an appropriate coating or plating, the material exhibits low corrosion resistance. |
| High cost/performance ratio | General temperature stability |
Neodymium-Iron-Boron Property Table
| Overview of Magnetic Properties of NdFeB Materials | ||||||||
| Materials | Remanence (minimum value) | Intrinsic coercivity (minimum value) | Magnetic coercivity (minimum value) | Maximum magnetic energy product | ||||
| Grade | ||||||||
| Grade | Br | Hcj | Hcb | (BH)max | ||||
| Units | kGs | Tesla | kOe | kA/m | kOe | kA/m | MGOe | kJ/m3 |
| N30 | 10.8~11.3 | 1.08~1.13 | 12.0 | 955 | 10.0 | 796 | 28~31 | 223~247 |
| N33 | 11.3~11.7 | 1.13~1.17 | 12.0 | 955 | 10.5 | 836 | 31~34 | 247~271 |
| N35 | 11.7~12.2 | 1.17–1.22 | 12.0 | 955 | 10.9 | 867 | 33~36 | 263~287 |
| N38 | 12.2~12.5 | 1.22~1.25 | 12.0 | 955 | 11.3 | 899 | 36~39 | 287~310 |
| N40 | 12.5~12.8 | 1.25~1.28 | 12.0 | 955 | 11.6 | 923 | 38~41 | 302~326 |
| N42 | 12.8~13.2 | 1.28~1.32 | 12.0 | 955 | 11.6 | 923 | 40~43 | 318~342 |
| N45 | 13.2~13.6 | 1.32~1.36 | 12.0 | 955 | 11.0 | 875 | 43~46 | 342~366 |
| N48 | 13.6~14.0 | 1.36~1.40 | 12.0 | 955 | 11.2 | 891 | 46~49 | 366~390 |
| N50 | 14.0~14.3 | 1.40~1.43 | 12.0 | 955 | 10.5 | 836 | 47~51 | 374~406 |
| N52 | 14.3~14.6 | 1.43~1.46 | 12.0 | 955 | 10.5 | 836 | 51~53 | 390~422 |
| N30M | 10.8~11.3 | 1.08~1.13 | 14.0 | 1114 | 10.0 | 796 | 28~31 | 223~247 |
| N33M | 11.3~11.7 | 1.13~1.17 | 14.0 | 1114 | 10.5 | 836 | 31~34 | 247~271 |
| N35M | 11.7~12.2 | 1.17–1.22 | 14.0 | 1114 | 10.9 | 867 | 33~36 | 263~287 |
| N38M | 12.2~12.5 | 1.22~1.25 | 14.0 | 1114 | 11.3 | 899 | 36~39 | 287~310 |
| N40M | 12.5~12.8 | 1.25~1.28 | 14.0 | 1114 | 11.6 | 923 | 38~41 | 302~326 |
| N42M | 12.8~13.2 | 1.28~1.32 | 14.0 | 1114 | 12.0 | 955 | 40~43 | 318~342 |
| N45M | 13.2~13.6 | 1.32~1.36 | 14.0 | 1114 | 12.5 | 995 | 43~46 | 342~366 |
| N48M | 13.6~14.0 | 1.36~1.40 | 14.0 | 1114 | 12.8 | 1019 | 46~49 | 358~390 |
| N50M | 14.0~14.3 | 1.40~1.43 | 14.0 | 1114 | 13.0 | 1035 | 47~51 | 374~406 |
| N52M | 14.3~14.6 | 1.43~1.46 | 14.0 | 1114 | 12.5 | 995 | 51~53 | 390~422 |
| N30H | 10.8~11.3 | 1.08~1.13 | 17.0 | 1353 | 10.0 | 796 | 28~31 | 223~247 |
| N33H | 11.3~11.7 | 1.13~1.17 | 17.0 | 1353 | 10.5 | 836 | 31~34 | 247~271 |
| N35H | 11.7~12.2 | 1.17–1.22 | 17.0 | 1353 | 10.9 | 867 | 33~36 | 263~287 |
| N38H | 12.2~12.5 | 1.22~1.25 | 17.0 | 1353 | 11.3 | 899 | 36~39 | 287~310 |
| N40H | 12.5~12.8 | 1.25~1.28 | 17.0 | 1353 | 11.6 | 923 | 38~41 | 302~326 |
| N42H | 12.8~13.2 | 1.28~1.32 | 17.0 | 1353 | 12.0 | 955 | 40~43 | 318~342 |
| N45H | 13.2~13.6 | 1.32~1.36 | 17.0 | 1353 | 12.2 | 971 | 43~46 | 342~366 |
| N48H | 13.6~14.0 | 1.36~1.40 | 17.0 | 1353 | 12.9 | 1027 | 46~49 | 358~390 |
| N50H | 14.0~14.3 | 1.40~1.43 | 16.0 | 1273 | 13.0 | 1035 | 47~51 | 374~406 |
| N30SH | 10.8~11.3 | 1.08~1.13 | 20.0 | 1592 | 10.1 | 804 | 28~31 | 223~247 |
| N33SH | 11.3~11.7 | 1.13~1.17 | 20.0 | 1592 | 10.6 | 844 | 31~34 | 247~271 |
| N35SH | 11.7~12.2 | 1.17–1.22 | 20.0 | 1592 | 11.0 | 875 | 33~36 | 263~287 |
| N38SH | 12.2~12.5 | 1.22~1.25 | 20.0 | 1592 | 11.4 | 907 | 36~39 | 287~310 |
| N40SH | 12.5~12.8 | 1.25~1.28 | 20.0 | 1592 | 11.8 | 939 | 38~41 | 302~326 |
| N42SH | 12.8~13.2 | 1.28~1.32 | 20.0 | 1592 | 12.2 | 971 | 40~43 | 318~342 |
| N45SH | 13.2~13.6 | 1.32~1.36 | 20.0 | 1592 | 12.3 | 979 | 43~46 | 342~366 |
| N48SH | 13.6~14.0 | 1.36~1.40 | 19.0 | 1512 | 12.5 | 995 | 46~49 | 366~390 |
| N28UH | 10.4–10.8 | 1.04~1.08 | 25.0 | 1989 | 9.6 | 764 | 26~29 | 207~231 |
| N30UH | 10.8~11.3 | 1.08~1.13 | 25.0 | 1989 | 10.2 | 812 | 28~31 | 223~247 |
| N33UH | 11.3~11.7 | 1.13~1.17 | 25.0 | 1989 | 10.7 | 851 | 31~34 | 247~271 |
| N35UH | 11.7~12.2 | 1.17–1.22 | 25.0 | 1989 | 10.8 | 859 | 33~36 | 263~287 |
| N38UH | 12.2~12.5 | 1.22~1.25 | 25.0 | 1989 | 11.0 | 875 | 36~39 | 287~310 |
| N40UH | 12.5~12.8 | 1.25~1.28 | 25.0 | 1989 | 11.5 | 915 | 38~41 | 302~326 |
| N42UH | 12.8~13.2 | 1.28~1.32 | 25.0 | 1989 | 12.2 | 971 | 40~43 | 310~342 |
| N45UH | 13.2~13.6 | 1.32~1.36 | 24.0 | 1909 | 12.3 | 979 | 43~46 | 342~366 |
| N28EH | 10.4–10.8 | 1.04~1.08 | 30.0 | 2387 | 9.8 | 780 | 26~29 | 207~231 |
| N30EH | 10.8~11.3 | 1.08~1.13 | 30.0 | 2387 | 10.2 | 812 | 28~31 | 223~247 |
| N33EH | 11.3~11.7 | 1.13~1.17 | 30.0 | 2387 | 10.3 | 820 | 31~34 | 247~271 |
| N35EH | 11.7~12.2 | 1.17–1.22 | 30.0 | 2387 | 10.5 | 836 | 33~36 | 263~287 |
| N38EH | 12.2~12.5 | 1.22~1.25 | 30.0 | 2387 | 11.5 | 915 | 36~39 | 279~310 |
| N28AH | 10.4–10.8 | 1.04~1.08 | 34.0 | 2706 | 9.8 | 780 | 26~29 | 199~231 |
| N30AH | 10.8~11.3 | 1.08~1.13 | 34.0 | 2706 | 10.2 | 812 | 27~31 | 215~247 |
| N33AH | 11.3~11.7 | 1.13~1.17 | 34.0 | 2706 | 10.3 | 820 | 31~34 | 239~271 |
| N35AH | 11.7~12.2 | 1.17–1.22 | 34.0 | 2706 | 10.5 | 836 | 33~36 | 255~287 |
Physical Properties Table
| General Physical Properties | ||
| Parameter Parameter | Unit | Indicator Standdrd |
| Curie Temperature | °C | 310-380 |
| Reversible temperature coefficient of Br αBr | %/°C | -0.9--0.13 |
| Hcj reversible temperature coefficient βHcj | %/°C | -0.35--0.80 |
| Maximum Operating Temperature | °C | 80-230 |
| Density Density | g/cm³ | 7.4-7.8 |
| Vickers Hardness | HV | 550-650 |
| Tensile Bending Strength | Mpa | 250 |
| Tensile Strength | Mpa | 80 |
| Compressive Strength | Mpa | 1050 |
| Resistivity Resistivity | μΩ·cm | 150 |
| Thermal Conductivity | W/(m·K) | 6-8 |
Neodymium-Iron-Boron Material Curve Chart
Neodymium Iron Boron Production Process
Neodymium Iron Boron Surface Treatment
The general process flow of electroplating is as follows:
Whether performed manually or mechanically, chamfering is a time‑consuming process; consequently, the electroplating procedure is relatively slow and requires a specific processing cycle.
Commonly used coatings include zinc plating, nickel plating, phosphating and passivation, and epoxy coating; other coatings include Everlube, tin plating, chromium plating, gold plating, and silver plating.
Application areas
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Email:info@north-magnet.cc
Fax: 022-87897562
Address: Floor 5, No. 4, Xinxing Park, Houtai Industrial Park, Xiqing District, Tianjin City
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