Sintered NdFeB magnets are powerful permanent magnets made from an alloy of neodymium, iron, and boron through a sintering process. The magnets offered by Ketian, the leading sintered NdFeB magnet manufacturer, possess high magnetic properties and excellent thermal stability. These sintered NdFeB magnets are widely used in various applications such as electric motors, wind turbines, hard disk drives, and magnetic fasteners due to their high energy product and coercive force.
Proportioning
Strip Casting
Hydrogen Decrepitation
Jet Miling
Molding
Sintering & Annealing
Inspection
Cutting / Machining
Grain Boundary Diffusion
Surface Treatment
Inspection
Packing
Delivery
| Magnetic Properties of N-series Magnet | ||||||
| NO | Grade | Magnet Property | Max Working Temp TW(°C ) | |||
| Remanence, Br mT or kGs | Coercivity, Hcb kA/m or kOe | Intrinsic Coercivity, H | Maximum Energy Product, (BH)max kJ/m3 or MGOe | |||
| 1 | N55 | 1470-1530 (14.7-15.3) | ≥860(≥10.8) | ≥876(≥11) | 414-438 (52-56) | 70 |
| 2 | N52 | 1430-1480 (14.3-14.8) | ≥860(≥10.8) | ≥876(≥11) | 398-422 (50-53) | 70 |
| 3 | N50 | 1400-1450 (14.0-14.5) | ≥860(≥10.8) | ≥960(≥12) | 382-406 (48-51) | 70 |
| 4 | N48 | 1380-1420 (13.8-14.2) | ≥836(≥10.5) | ≥900(≥11) | 366-390 (46-49) | 80 |
| 5 | N45 | 1320-1380 (13.2-13.8) | ≥876(≥11.0) | ≥960(≥12) | 342-366 (43-46) | 80 |
| 6 | N42 | 1280-1320 (12.8-13.2) | ≥923(≥11.6) | ≥960(≥12) | 318-342 (40-43) | 80 |
| 7 | N40 | 1250-1280 (12.5-12.8) | ≥923(≥11.6) | ≥960(≥12) | 302-326 (38-41) | 80 |
| 8 | N38 | 1220-1250 (12.2-12.5) | ≥899(≥11.3) | ≥960(≥12) | 287-310 (36-39) | 80 |
| 9 | N35 | 1180-1220 (11.8-12.2) | ≥868(≥10.9) | ≥960(≥12) | 263-287 (33-36) | 80 |
| 10 | N33 | 1130-1180 (11.3-118) | ≥836(≥10.5) | ≥960(≥12) | 247-270 (31-34) | 80 |
| 11 | N30 | 1080-1130 (10.8-11.3) | ≥796(≥10) | ≥960(≥12) | 223-247 (28-31) | 80 |
| Magnetic Properties of M-series Magnet | ||||||
| NO | Grade | Magnet Property | Max Working Temp TW(°C ) | |||
| Remanence, Br mT or kGs | Coercivity, Hcb kA/m or kOe | Intrinsic Coercivity, H cJ kA/m or kOe | Maximum Energy Product, (BH)max kJ/m3 or MGOe | |||
| 1 | N55M | 1470-1530 (14.7-15.3) | ≥1035(≥13.0) | ≥1114(≥14) | 414-438 (52-56) | 100 |
| 2 | N52M | 1430-1480 (14.3-14.8) | ≥1035(≥13.0) | ≥1114(≥14) | 398-414 (50-52) | 100 |
| 3 | N50M | 1400-1450 (14.0-14.5) | ≥1035(≥13.0) | ≥1114(≥14) | 382-406 (48-51) | 100 |
| 4 | N48M | 1380-1430 (13.7-14.3) | ≥1027(≥12.9) | ≥1114(≥14) | 366-390 (46-49) | 100 |
| 5 | N45M | 1330-1380 (13.2-13.8) | ≥995(≥12.5) | ≥1114(≥14) | 342-366 (43-46) | 100 |
| 6 | N42M | 1280-1330 (12.8-13.2) | ≥955(≥12.0) | ≥1114(≥14) | 318-342 (40-43) | 100 |
| 7 | N40M | 1250-1280 (12.5-12.8) | ≥923(≥11.6) | ≥1114(≥14) | 302-326 (38-41) | 100 |
| 8 | N38M | 1220-1250 (12.2-12.5) | ≥899(≥11.3) | ≥1114(≥14) | 287-310 (36-39) | 100 |
| 9 | N35M | 1180-1220 (11.8-12.2) | ≥868(≥10.9) | ≥1114(≥14) | 263-287 (33-36) | 100 |
| 10 | N33M | 1130-1180 (11.3-11.8) | ≥836(≥10.5) | ≥1114(≥14) | 247-270 (31-34) | 100 |
| 11 | N30M | 1080-1130 (10.8-11.3) | ≥796(≥10.0) | ≥1114(≥14) | 223-247 (28-31) | 100 |
| Magnetic Properties of H-series Magnet | ||||||
| NO | Grade | Magnet Property | Max Working Temp TW(°C ) | |||
| Remanence, Br mT or kGs | Coercivity, Hcb kA/m or kOe | Intrinsic Coercivity, H cJ kA/m or kOe | Maximum Energy Product, (BH)max kJ/m3 or MGOe | |||
| 1 | N54H | 1450-1530 (14.5-15.3) | ≥1035(≥13.0) | ≥1274(≥16) | 414-438 (52-55) | 120 |
| 2 | N52H | 1430-1480 (14.3-14.8) | ≥1035(≥13.0) | ≥1274(≥16) | 398-414 (50-52) | 120 |
| 3 | N50H | 1400-1450 (14.0-14.5) | ≥1035( ≥13.0) | ≥1274(≥16) | 382-406 (48-51) | 120 |
| 4 | N48H | 1370-1430 (13.7-14.3) | ≥1035(≥13.0) | ≥1274(≥16) | 366-390 (46-49) | 120 |
| 5 | N46H | 1330-1380 (13.3-13.8) | ≥1018(≥12.8) | ≥1274(≥16) | 350-374 (44-47) | 120 |
| 6 | N45H | 1330-1380 (13.3-13.8) | ≥1010(≥12.7) | ≥1353(≥17) | 342-366 (43-46) | 120 |
| 7 | N44H | 1310-1360 (13.1-13.6) | ≥1003(≥12.6) | ≥1353(≥17) | 326-358 (42-45) | 120 |
| 8 | N42H | 1280-1330 (12.8-13.3) | ≥995(≥12.5) | ≥1353(≥17) | 318-342 (40-43) | 120 |
| 9 | N40H | 1250-1280 (12.5-12.8) | ≥940(≥11.8) | ≥1353(≥17) | 302-326 (38-41) | 120 |
| 10 | N38H | 1220-1250 (12.2-12.5) | ≥899(≥11.3) | ≥1353(≥17) | 287-310 (36-39) | 120 |
| 11 | N35H | 1180-1220 (11.8-12.2) | ≥876(≥11.0) | ≥1353(≥17) | 263-287 (33-36) | 120 |
| 12 | N33H | 1130-1180 (11.3-11.8) | ≥844(≥10.6) | ≥1353(≥17) | 247-271 (31-34) | 120 |
| 13 | N30H | 1080-1130 (10.8-11.3) | ≥812(≥10.2) | ≥1353(≥17) | 223-247 (28-31) | 120 |
| Magnetic Properties of SH-series Magnet | ||||||
| NO | Grade | Magnet Property | Max Working Temp TW(°C ) | |||
| Remanence, Br mT or kGs | Coercivity, Hcb kA/m or kOe | Intrinsic Coercivity, H cJ kA/m or kOe | Maximum Energy Product, (BH)max kJ/m3 or MGOe | |||
| 1 | N52SH | 1430-1450 (14.3-14.5) | ≥1050(≥13.2) | ≥1600(≥20) | 406-430 (51-54) | 150 |
| 2 | N5OSH | 1400-1430 (14.0-14.3) | ≥1035(≥13.0) | ≥1600(≥20) | 390-406 (49-51) | 150 |
| 3 | N48SH | 1370-1430 (13.7-14.3) | ≥1003(≥12.6) | ≥1600(≥20) | 366-390 (46-49) | 150 |
| 4 | N45SH | 1320-1380 (13.2-13.8) | ≥1003(≥12.6) | ≥1600(≥20) | 342-366 (43-46) | 150 |
| 5 | N44SH | 1310-1350 (13.1-13.5) | ≥1003(≥12.6) | ≥1600(≥20) | 334-358 (42-45) | 150 |
| 6 | N42SH | 1280-1320 (12.8-13.2) | ≥995(≥12.5) | ≥1600(≥20) | 318-342 (40-43) | 150 |
| 7 | N40SH | 1250-1280 (12.5-12.8) | ≥947(≥11.9) | ≥1600(≥20) | 302-326 (38-41) | 150 |
| 8 | N38SH | 1220-1250 (12.2-12.5) | ≥931(≥11.7) | ≥1600(≥20) | 287-310 (36-39) | 150 |
| 9 | N35SH | 1180-1220 (11.8-12.2) | ≥907(≥11.4) | ≥1600(≥20) | 263-287 (33-36) | 150 |
| 10 | N33SH | 1130-1180 (11.3-11.8) | ≥844(≥10.6) | ≥1600(≥20) | 247-271 (31-34) | 150 |
| 11 | N30SH | 1080-1130 (10.8-11.3) | ≥804(≥10.01) | ≥1600(≥20) | 223-247 (28-31) | 150 |
| M agnetic Properties of UH-series Magnet | ||||||
| NO | Grade | Magnet Property | Max Working Temp TW(°C ) | |||
| Remanence, Br mT or kGs | Coercivity, Hcb kA/m or kOe | Intrinsic Coercivity, H cJ kA/m or kOe | Maximum Energy Product, (BH)max kJ/m3 or MGOe | |||
| 1 | N45UH | 1310-1350 (13.1-13.5) | ≥1003(≥12.6) | ≥2000(≥25) | 334-358 (42-45) | 180 |
| 2 | N42UH | 1280-1320 (12.8-13.2) | ≥907(≥11.4) | ≥2000(≥25) | 318-342 (40-43) | 180 |
| 3 | N40UH | 1250-1280 (12.5-12.8) | ≥907(≥11.4) | ≥2000(≥25) | 302-326 (38-41) | 180 |
| 4 | N38UH | 1220-1250 (12.2-12.5) | ≥907(≥11.4) | ≥2000(≥25) | 287-310 (36-39) | 180 |
| 5 | N35UH | 1180-1220 (11.8-12.2) | ≥875(≥11.0) | ≥2000(≥25) | 263-287 (33-36) | 180 |
| 6 | N33UH | 1130-1180 (11.3-11.8) | ≥844(≥10.6) | ≥2000(≥25) | 247-271 (31-34) | 180 |
| 7 | N30UH | 1080-1130 (10.8-11.3) | ≥835(≥10.5) | ≥2000(≥25) | 223-247 (28-31) | 180 |
| 8 | N28UH | 1020-1080 (10.2-10.8) | ≥764(≥9.6) | ≥2000(≥25) | 207-239 (26-30) | 180 |
| Magnetic Properties of EH-series, AH-series Magnet | ||||||
| NO | Grade | Magnet Property | Max Working Temp TW(°C ) | |||
| Remanence, Br mT or kGs | Coercivity, Hcb kA/m or kOe | Intrinsic Coercivity, H cJ kA/m or kOe | Maximum Energy Product, (BH)max kJ/m3 or MGOe | |||
| 1 | N42EH | 1280-1310 (12.8-13.1) | ≥907(≥11.4) | ≥2388(≥30) | 320-340 (38-41) | 200 |
| 2 | N40EH | 1250-1280 (12.5-12.8) | ≥907(≥11.4) | ≥2388(≥30) | 302-326 (38-41) | 200 |
| 3 | N38EH | 1220-1250 (12.2-12.5) | ≥907(≥11.4) | ≥2388(≥30) | 287-310 (36-39) | 200 |
| 4 | N35EH | 1180-1220 (11.8-12.2) | ≥876(≥11.0) | ≥2388(≥30) | 263-287 (33-36) | 200 |
| 5 | N33EH | 1130-1180 (11.3-11.8) | ≥812(≥10.2) | ≥2388(≥30) | 247-271 (31-34) | 200 |
| 6 | N30EH | 1080-1130 (10.8-11.3) | ≥812(≥10.2) | ≥2388(≥30) | 223-247 (28-31) | 200 |
| 7 | N28EH | 1040-1080 (10.4-10.8) | ≥780(≥9.8) | ≥2400(≥30) | 207-231 (26-29) | 200 |
| 8 | N38AH | 1220-1250 (12.2-12.5) | ≥907(≥11.4) | ≥2706(≥34) | 287-310 (36-39) | 240 |
| 9 | N35AH | 1180-1220 (11.8-12.2) | ≥812(≥10.2) | ≥2785(≥35) | 263-287 (33-36) | 240 |
| 10 | N33AH | 1130-1180 (11.3-11.8) | ≥812(≥10.2) | ≥2785(≥35) | 247-271 (31-34) | 240 |
| 11 | N30AH | 1080-1130 (10.8-11.3) | ≥812(≥10.2) | ≥2785(≥35) | 223-247 (28-31) | 240 |
Remarks
The above data is developed with reference to the Chinese National Standard GB/T1 3560
The testing method is according to the Magnetic Material Testing Standard GB/T3217
For high temperature features, specification is to be determined according to clients' requirement.
Conversion between SI and CGS: 1T=10kGs, 1 kOe=79.6kA/m, 1 MGOe=7.96kJ/m3
The Max. Working Temperature refers to the temperature point when the irreversible flux loss under open-circuit test is≤5%, while the PC value of magnet L/D=0.7.
| Magnetic Properties of GBD Magnets | |||||
| Grade | Remanence,Br mT or kGs | Coercivity, Hcb kA/m or kOe | Intrinsic Coercivity, H cJ kA/m or kOe | Maximum Energy Product, (BH)max kJ/m3 or MGOe | Max Working Temp TW(°C ) |
| G55H | 1440-1480(14.4-14.8) | ≥1061(≥13.3) | ≥1353(≥17) | 398-422 (53-56) | 120 |
| G52H | 1410-1470(14.1-14.7) | ≥1050(≥13.2) | ≥1353(≥17) | 398-422 (50-53) | 120 |
| G55SH | 1440-1480(14.4-14.8) | ≥1050(≥13.3) | ≥1592(≥20) | 398-422 (53-56) | 150 |
| G52SH | 1430-1450(14.3-14.5) | ≥1050(≥13.2) | ≥1592(≥20) | 406-430 (51-54) | 150 |
| G5OSH | 1400-1450(14.0-14.5) | ≥1035(≥13.0) | ≥1592(≥20) | 382-406 (48-51) | 150 |
| G48SH | 1370-1430(13.7-14.3) | ≥1035(≥13.0) | ≥1592(≥20) | 366-390 (46-49) | 150 |
| G45SH | 1320-1370(13.2-13.7) | ≥1003(≥12.6) | ≥1592(≥20) | 342-366 (43-46) | 150 |
| G52UH | 1410-1470(14.1-14.6) | ≥1050(≥13.2) | ≥1990(≥25) | 398-422 (50-53) | 180 |
| G50UH | 1400-1450(14.0-14.5) | ≥1035(≥13.0) | ≥1990(≥25) | 382-406 (48-51) | 180 |
| G48UH | 1370-1430(13.7-14.3) | ≥1035(≥13.0) | ≥1990(≥25) | 366-390 (46-49) | 180 |
| G45UH | 1300-1360(13.0-13.6) | ≥1003(≥12.6) | ≥1990(≥25) | 342-366 (43-46) | 180 |
| G42UH | 1280-1340(12.8-13.4) | ≥907(≥11.4) | ≥1990(≥25) | 318-342 (40-43) | 180 |
| G40UH | 1260-1310(12.6-13.1) | ≥907(≥11.4) | ≥1990(≥25) | 302-326 (38-41) | 180 |
| G50EH | 1400-1450(14.0-14.5) | ≥1035(≥13.0) | ≥2388(≥30) | 382-406 (48-51) | 200 |
| G48EH | 1370-1430(13.7-14.3) | ≥1035(≥13.0) | ≥2388(≥30) | 366-390 (46-49) | 200 |
| G45EH | 1300-1360(13.0-13.6) | ≥1003(≥12.6) | ≥2388 (≥30) | 342-366 (43-46) | 200 |
| G42EH | 1280-1320(12.8-13.2) | ≥907(≥11.4) | ≥2388 (≥30) | 318-342 (40-43) | 200 |
| G40EH | 1260-1310(12.6-13.1) | ≥907(≥11.4) | ≥2388 (≥30) | 302-326 (38-41) | 200 |
| G38EH | 1220-1270(12.2-12.7) | ≥907(≥11.4) | ≥2388 (≥30) | 287-310 (36-39) | 200 |
| G45AH | 1300-1360(13.0-13.6) | ≥1003(≥12.6) | ≥2786(≥35) | 342-366 (43-46) | 220 |
| G42AH | 1280-1340(12.8-13.4) | ≥907(≥11.4) | ≥2786(≥35) | 318-342 (40-43) | 220 |
| G40AH | 1260-1310(12.6-13.1) | ≥907(≥11.4) | ≥2786(≥35) | 302-326 (38-41) | 220 |
| G38AH | 1220-1250(12.2-12.5) | ≥907(≥11.4) | ≥2786(≥35) | 287-310 (36-39) | 220 |
| G35AH | 1160-1230(11.6-12.3) | ≥812(≥10.2) | ≥2786(≥35) | 263-287 (33-36) | 220 |
| Shape Type | Picture | Dimenion | Recommended Dimension/mm | Maximum Dimension/mm |
| Block |
| L | ≤180 | ≤ 220 |
| W | ≤120 | ≤150 | ||
| T | ≤60 | ≤80 | ||
| Cylinder |
| D | ≤150 | ≤220 |
| T | ≤60 | ≤80 | ||
| Ring |
| D | ≤120 | ≤160 |
| d | ≤80 | ≤100 | ||
| T | ≤45 | ≤65 | ||
| Segment |
| L | ≤180 | ≤220 |
| W | ≤120 | ≤150 | ||
| T | ≤60 | ≤80 | ||
| a | 0-180°C | |||
Weight limit per piece: ≤5kg for "Recommended dimension"; ≤10kg for "Maximum dimension"
The Maximum Dimension may be related with the magnet grade.
Type | Coating Type | Color | Thickness/um | SST/h | PCT/h | Salt immersion test | Working temp./℃ |
Metal coating | Blue Zn | Blue/White | 5-10 | ≥48 | ≥48 | N/A | ＜160 |
Color Zn | Multiple colors | 5-10 | ≥72 | ≥72 | N/A | ＜160 | |
NiCuNi | Silver white | 10-30 | ≥72 | ≥96 | N/A | ＜200 | |
Al | Silver white | 5-25 | ≥96 | ≥240 | N/A | ＜390 | |
Organic coating | Epoxy (electro) | Black/Grey | 10-30 | ≥480 | ≥96 | N/A | ＜180 |
Epoxy (spray) | Black/Grey | 10-30 | ≥480 | ≥96 | N/A | ＜180 | |
Multi-layer coating | NiCuNi+coating | Black/Grey | 15-45 | ≥720 | ≥168 | N/A | ＜180 |
Inorganic coating | Phosphate/ Passivated | Grey | ＜2 | N/A | N/A | 1H | ＜250 |
Bluing | Blue | ＜2 | N/A | N/A | 2H | ＜250 |
The above data represent the best performance. The actual specification is to be adjusted according to variable product size and shape.
Muli-layer coatings is a combination of different type of coatings. It' S color, thickness and working temperature may vary from different combinations.
Test condition of PCT: 121°C, 100% humidity, 2 atms
Test condition of HAST: 132"C, 95% humidity, 2.7 atms. HAST is to evaluate the weight loss of magnet after testing, the lower the better.
If you would like to custom your own NdFeB Magnets or request a quote, please fill out the form below with any questions or concerns.
400-865-6067 
ktsales@ktmagnet.com 
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