Magnetic Properties of Permanent Magnets
Here are material and grade of a magnet refer to a set of properties which ultimately yield the magnet’s performance.
Sintered Neodymium Iron Boron (NdFeB)
Sintered NdFeB magnets are strong permanent magnets made of an alloy of neodyumium, Iron, and Boron. NdFeB Magnets are the strongest available magnets, but have a low maximum temperature resistance. NefeB Magnets Will oxidize rapidly, so an anti-corrosive coating is needed to protect the substrate. See Plating and Coating options for more information.
| Grade Name | Br (KG) | HcB (KOe) | Hci (KOe) | BHmax(MGOe) | Tmax |
| N35 | 11.7-12.2 | ≥10.9 | ≥12.0 |
33-36 | 80C / 176F |
| N38 | 12.2-12.5 | ≥10.9 | ≥12.0 | 36-39 | 80C / 176F |
| N40 | 12.5-12.8 | ≥11.4 | ≥12.0 | 38-41 | 80C / 176F |
| N42 | 12.8-13.2 | ≥11.5 | ≥12.0 | 40-43 | 80C / 176F |
| N45 | 13.2-13.8 | ≥11.6 | ≥12.0 | 43-46 | 80C / 176F |
| N48 | 13.8-14.2 | ≥11.6 | ≥12.0 | 46-49 | 80C / 176F |
| N50 | 14.0-14.5 | ≥10.0 | ≥11.0 | 48-51 | 70C / 158F |
| N52 | 14.3-14.8 | ≥10.0 | ≥11.0 | 50-53 | 70C / 158F |
| 30M | 10.8-11.3 | ≥10.0 | ≥14.0 | 28-31 | 100C / 212F |
| 33M | 11.3-11.7 | ≥10.5 | ≥14.0 | 31-33 | 100C / 212F |
| 35M | 11.7-12.2 | ≥10.9 | ≥14.0 | 33-36 | 100C / 212F |
| 38M | 12.2-12.5 | ≥11.3 | ≥14.0 | 36-39 | 100C / 212F |
| 40M | 12.5-12.8 | ≥11.6 | ≥14.0 | 38-41 | 100C / 212F |
| 42M | 12.8-13.2 | ≥12.0 | ≥14.0 | 40-43 | 100C / 212F |
| 45M | 13.2-13.8 | ≥12.5 | ≥14.0 | 43-46 | 100C / 212F |
| 48M | 13.6-14.3 | ≥12.9 | ≥14.0 | 46-49 | 100C / 212F |
| 50M | 14.0-14.5 | ≥13.0 | ≥14.0 | 48-51 | 100C / 212F |
| 30H | 10.8-11.3 | ≥10.0 | ≥17.0 | 28-31 | 120C / 248F |
| 33H | 11.3-11.7 | ≥10.5 | ≥17.0 | 31-34 | 120C / 248F |
| 35H | 11.7-12.2 | ≥10.9 | ≥17.0 | 33-36 | 120C / 248F |
| 38H | 12.2-12.5 | ≥11.3 | ≥17.0 | 36-39 | 120C / 248F |
| 40H | 12.5-12.8 | ≥11.6 | ≥17.0 | 38-41 | 120C / 248F |
| 42H | 12.8-13.2 | ≥12.0 | ≥17.0 | 40-43 | 120C / 248F |
| 45H | 13.2-13.8 | ≥12.0 | ≥17.0 | 43-46 | 120C / 248F |
| 48H | 13.7-14.3 | ≥12.5 | ≥17.0 | 46-49 | 120C / 248F |
| 30SH | 10.8-11.3 | ≥10.1 | ≥20.0 | 28-31 | 150C / 302F |
| 33SH | 11.3-11.7 | ≥10.6 | ≥20.0 | 31-34 | 150C / 302F |
| 35SH | 11.7-12.2 | ≥11.0 | ≥20.0 | 33-36 | 150C / 302F |
| 38SH | 12.2-12.5 | ≥11.4 | ≥20.0 | 36-39 | 150C / 302F |
| 40SH | 12.4-12.8 | ≥11.8 | ≥20.0 | 38-41 | 150C / 302F |
| 42SH | 12.8-13.2 | ≥12.4 | ≥20.0 | 40-43 | 150C / 302F |
| 45SH | 13.2-13.8 | ≥12.6 | ≥20.0 | 43-46 | 150C / 302F |
| 28UH | 10.2-10.8 | ≥9.6 | ≥25.0 | 26-29 | 180C / 356F |
| 30UH | 10.8-11.3 | ≥10.2 | ≥25.0 | 28-31 | 180C / 356F |
| 33UH | 11.3-11.7 | ≥10.7 | ≥25.0 | 31-34 | 180C / 356F |
| 35UH | 11.8-12.2 | ≥10.8 | ≥25.0 | 33-36 | 180C / 356F |
| 38UH | 12.2-12.5 | ≥11.3 | ≥25.0 | 36-39 | 180C / 356F |
| 40UH | 12.4-12.8 | ≥11.3 | ≥25.0 | 38-41 | 180C / 356F |
| 28EH | 10.4-10.9 | ≥9.8 | ≥30.0 | 26-29 | 200C / 392F |
| 30EH | 10.8-11.3 | ≥10.2 | ≥30.0 | 28-31 | 200C / 392F |
| 33EH | 11.3-11.7 | ≥10.5 | ≥30.0 | 31-34 | 200C / 392F |
| 35EH | 11.7-12.2 | ≥11.0 | ≥30.0 | 33-36 | 200C / 392F |
| 38EH | 12.2-12.5 | ≥11.3 | ≥30.0 | 36-39 | 200C / 392F |
Aluminum Nickel Cobalt (AlNiCo)
AlNiCo magnets are very stable and have good corrosion resistance and a typical hardness of 50 Rockwell C. AlNiCo represents the most versatile magnet material available. The range of properties can be accurately designed for specific applications by changes to element analysis and heat treatment.
| Grade Name | Br (KG) | HcB (KOe) | BHmax(MGOe) | Tmax |
| LN9 | 6.8 | ≥0.38 | 1.13 | 450C / 842F |
| LN10 | 6.0 | ≥0.5 | 1.2 | 450C / 842F |
| LNG12 | 7.2 | ≥0.5 | 1.55 | 450C / 842F |
| LNG13 | 7.0 | ≥0.6 | 1.6 | 450C / 842F |
| LNG34 | 12.0 | ≥0.6 | 4.3 | 525C / 977F |
| LNG37 | 12.0 | ≥0.6 | 4.65 | 525C / 977F |
| LNG40 | 12.5 | ≥0.6 | 5.0 | 525C / 977F |
| LNG44 | 12.5 | ≥0.65 | 5.5 | 525C / 977F |
| LNG52 | 13.0 | ≥0.7 | 6.5 | 525C / 977F |
| LNGT28 | 10.0 | 0.72 | 3.5 | 550C / 1022F |
| LNGT36J | 7.0 | 1.75 | 4.5 | 550C / 1022F |
| LNGT32 | 8.0 | 1.25 | 4.0 | 550C / 1022F |
| LNGT40 | 8.0 | 1.38 | 5.0 | 550C / 1022F |
| LNGT60 | 9.0 | 1.38 | 7.5 | 550C / 1022F |
| LNGT72 | 1.05 | 1.4 | 9.0 | 550C / 1022F |
Samarium Cobalt (SmCo)
SmCo magnets are made of a strong permanent magnet alloy of samarium and cobalt. Compared to NdFeB magnets, SmCo magnets are weaker, but are more suiteable for working in higher temperatures. SmCo magnets are very anti-corrosive and generally do not require electroplated surface treatment.
| Grade Name | Br (KG) | HcB (KOe) | Hci (KOe) | BHmax(MGOe) | Tmax |
| YX18 | 8.5-9.0 | ≥7.8-8.2 | ≥15-19 | 16-18 | 250C / 482F |
| YX20 | 9.2-9.6 | ≥8.2-9.0 | ≥15-19 |
19-21 | 250C / 482F |
| YX24 | 9.6-10.0 | ≥9.2-9.7 | ≥15-19 |
22-24 | 250C / 482F |
| YXH24 | 9.5-10.2 | ≥8.0-9.2 | ≥18-25 | 22-24 | 300C / 572F |
| YXG26 | 10.2-10.5 | ≥9.4-10.0 | ≥18-25 |
24-26 | 300C / 572F |
| YXG28 | 10.5-10.8 | ≥9.5-10.0 | ≥18-25 |
26-28 | 300C / 572F |
| YXG28B | 10.2-11.0 | ≥5.2-6.5 | ≥5.5-6.5 | 26-28 | 300C / 572F |
| YXG30 | 10.8-11.0 | ≥9.8-10.5 | ≥18-25 | 28-30 | 300C / 572F |
| YXG30B | 10.8-11.0 | ≥5.2-5.6 | ≥5.5-6.5 | 28-30 | 300C / 572F |
Bonded Neodymium Iron Boron (NdFeB)
Bonded NdFeB is a cast/molded type of NdFeB which can be further machined and pressed into different shapes like rings, arcs, and many more complex geometries. It also has a higher corrosion resistance compared with sintered NdFeB. Bonded magnets offer less magnetic strength than sintered magnets s but can be formed into intricately shaped parts.
| Grade Name | Br (KG) | HcB (KOe) | Hci (KOe) | BHmax(MGOe) | Tmax |
| BDM-4 | 3.5-4.5 | ≥3.0-3.5 | ≥8-10 | 3-4 | 120C / 248F |
| BDM-6 | 5.0-6.0 | ≥4.0-4.5 | ≥8-10 |
5-7 | 120C / 248F |
| BDM-8 | 5.5-6.5 | ≥4.5-5.0 | ≥12-14 |
5-8.5 | 150C / 302F |
| BDM-10 | 6.5-7.0 | ≥5.0-5.5 | ≥8-10 | 9-10 | 150C / 302F |
| BDM-12 | 7.0-8.0 | ≥5.5-6.0 | ≥9-11 |
10-12 | 80C / 176F |
| BDM-L | 7.0-8.0 | ≥2.0-2.5 | ≥2.2-3.0 |
4.5-6.5 | 80C / 176F |
Ferrite (Ceramic) Magnet
Ceramic, also known as Ferrite magnets are made of a composite of iron oxide and barium/strontium carbonate by ceramic processing technology. Ferrites are, like most other ceramics, hard and brittle. In terms of the magnetic properties, ferrites are often classified as “soft” and “hard” which refers to their low or high coercivity of their magnetism, respectively.
| Grade Name | Br (KG) | HcB (KOe) | Hci (KOe) | BHmax(MGOe) | Tmax |
| C1 | 2.3 | 1.86 | 3.5 | 1.05 | 250C / 482F |
| C5 | 3.8 | 2.4 | 2.5 | 3.4 | 250C / 482F |
| C7 | 3.4 | 3.23 | 4.0 | 2.75 |
250C / 482F |
| C8 | 3.85 | 2.95 | 3.05 | 3.5 | 250C / 482F |
| C8B | 4.2 | 2.913 | 2.96 | 4.12 | 250C / 482F |
| C9 | 3.8 | 3.516 | 4.01 | 3.32 | 250C / 482F |
| C10 | 4.0 | 3.617 | 3.51 | 3.82 | 250C / 482F |
| C11 | 4.3 | 2.512 | 2.56 | 4.32 | 250C / 482F |
Bonded NdFeB Magnets (Injection Molded)
Injection molded magnets are available using neodymium-iron-boron, or blends of magnetic materials to achieve an extensive range of properties. Binder types include Nylon 6 and 12, PPS, and Polyamide. The binders and magnetic alloys are capable of a wide range of application temperatures from below -40°C to above 180°C. The Injection molding process is particularly well suited to molding very intricate shapes and thin walled parts. The finished parts can be either very simple or complex in geometry.
|
Grade
|
Max. Energy Product |
Remanence
|
Coercive Force |
Rev. Temp. Coeff. |
Working Temp. |
Density |
||||||
|
(BH)max |
Br |
Hc |
Hci |
Bd |
Hd |
Tc |
D | |||||
| MGOe | kJ/m3 | kG | mT | kOe | kA/m | kOe | kA/m | %/°C | %/°C | °C | g/cm3 | |
| N-BM4 | 3.5-4.7 | 28.4-38.2 | 4.7 | 470 | 3.7 | 296 | 8.5 | 680 | -0.10 | -0.40 | 130 | 4.0-5.0 |
| N-BM6 | 5.2-7.0 | 42.3-56.9 | 5.2 | 520 | 4.3 | 344 | 10.0 | 800 | -0.10 | -0.40 | 180 | 5.0-5.5 |
| N-BM6H | 5.0-6.5 | 40.6-52.8 | 5.1 | 510 | 4.5 | 360 | 15.0 | 1200 | -0.13 | -0.40 | 150 | 5.0-5.5 |
| N-BM8 | 7.5-8.5 | 60.9-69.1 | 6.2 | 620 | 5.2 | 416 | 10.0 | 800 | -0.10 | -0.40 | 150 | 5.0-5.5 |
Binder: Nylon6, Nylon12, or Polyamide – Special
properties can be achieved with custom method.
Bonded Ferrite Magnets (Injection Molded)
Injection molded magnets are available using ferrite ceramic, or blends of magnetic materials to achieve an extensive range of properties. Binder types include Nylon 6 and 12, PPS, and Polyamide.
|
Grade
|
Max. Energy Product |
Remanence
|
Coercive Force |
|||||
|
(BH)max |
Br |
Hci |
Hcb |
|||||
| MGOe | kJ/m3 | kG | mT | kOe | kA/m | kOe | kA/m | |
| CB-1 | 0.50-0.70 | 4.0-5.6 | 1.40-1.60 | 140-160 | 1.80-2.00 | 143-159 | 1.30-1.50 | 103-119 |
| CB-2 | 1.10-1.30 | 8.8-10.4 | 2.00-2.20 | 200-220 | 2.50-2.70 | 199-215 | 1.70-1.90 | 135-151 |
| CB-3 | 1.40-1.60 | 11.2-12.8 | 2.40-2.60 | 240-260 | 2.60-2.80 | 207-223 | 2.00-2.20 | 159-175 |
| CB-4 | 1.60-1.80 | 12.8-14.4 | 2.50-2.70 | 250-270 | 2.70-2.90 | 215-231 | 2.10-2.30 | 167-183 |
| CB-5 | 1.90-2.10 | 15.2-16.8 | 2.70-2.90 | 270-290 | 2.60-2.80 | 207-223 | 2.10-2.30 | 167-183 |
Binder: Nylon 6, Nylon12, PPS – Special properties can be achieved with custom method.