Material & Geometry
Sintered NdFeB in discs, blocks, rings, cylinders and arc segments.
MAGNETIC MATERIALS
NdFeB MagnetsMore magnetic power.
Less design space.
High magnetic energy for compact motors, sensors and precision assemblies.
Request an NdFeB ReviewView GradesApplication overview
A high energy product is only the starting point. We review grade, geometry, operating temperature and the magnetic circuit together, then align coating, machining and magnetization with your production requirements.
FORMS & CONFIGURATIONS
Discs, Blocks, Rings and Cylinders.
Representative product forms. Final geometry, dimensions and material are confirmed against your drawing.
Discs
Ø1–Ø100mm × T0.5–25mm
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Blocks
1–200mm × 1–100mm × 1–50mm
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Rings
OD 3–200mm × ID 1–150mm × T 1–30mm
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Cylinders
Ø2–Ø50mm × L 2–100mm
Review This FormWHAT WE SUPPLY
Magnetic Material. Finished Component.
Manufacturing Base
Rare-earth material and processing capabilities in Ningbo and Mianyang.
Component Supply
Precision processing, protective finishes and magnetization specified for the application.
DESIGN & SELECTION
Select the Grade in Its Working Circuit.
- Magnetic circuit
Load line, geometry and demagnetization margin
- Thermal duty
Working temperature and thermal cycles
- Surface protection
Coating allowance and agreed exposure test
A good fit when
- High flux density in a compact envelope
- Motor, actuator and sensor designs with a defined air gap
- Applications where an engineered magnetic circuit can use the available energy product
- Projects that need a broad range of shapes, orientations and coatings
Check before release
- The grade's maximum working temperature is not a substitute for a thermal design review
- Corrosion protection must match humidity, chemicals, assembly process and edge exposure
- Thin sections, sharp corners and open magnetic circuits can increase irreversible loss risk
- Coating, magnetizing direction and adhesive compatibility should be frozen before PPAP
ENGINEERING REVIEW
Balance Field, Heat and Protection.
Review the working point, magnet temperature and exposure before choosing the grade and coating.
Working point
Share the air gap, pole geometry, target flux or force, and the nearby steel path. A grade number alone is not enough to confirm performance.
Temperature profile
Provide continuous, peak and dwell temperatures at the magnet, not only the ambient temperature. Include start-up and fault conditions when relevant.
Surface environment
State humidity, salt, chemicals, vacuum, cleaning agents and whether the finished part will be edge-sealed or encapsulated.
Magnetizing and assembly
Show orientation, pole count, adhesive, insertion force, fixturing and any shock or high-speed loads applied after magnetizing.
MATERIAL REFERENCE
Technical Data, Clearly Presented.
Complete technical grade data99 reference rows
99 rows
No matching results. Clear the filter or ask for selection help.
| Grade | Br mT (kGs) | Hcb kA/m (kOe) | Hcj kA/m (kOe) | (BH)max kJ/m³ (MGOe) | |
|---|---|---|---|---|---|
| N35 | 1180-1230 (11.8-12.3) | ≥876 (≥11) | ≥955 (≥12) | 263-287 (33-36) | Grade PDF |
| N38 | 1230-1260 (12.3-12.6) | ≥899 (≥11.3) | ≥955 (≥12) | 287-310 (36-39) | Material Datasheet |
| N40 | 1260-1290 (12.6-12.9) | ≥912 (≥11.5) | ≥955 (≥12) | 302-326 (38-41) | Material Datasheet |
| N42 | 1290-1330 (12.9-13.3) | ≥923 (≥11.6) | ≥955 (≥12) | 318-342 (40-43) | Material Datasheet |
| N45 | 1330-1370 (13.3-13.7) | ≥931 (≥11.7) | ≥955 (≥12) | 342-366 (43-46) | Material Datasheet |
| N48 | 1370-1400 (13.7-14.0) | ≥939 (≥11.8) | ≥955 (≥12) | 366-390 (46-49) | Material Datasheet |
| N50 | 1390-1430 (13.9-14.3) | ≥947 (≥11.9) | ≥955 (≥12) | 374-406 (47-51) | Material Datasheet |
| N52 | 1420-1460 (14.2-14.6) | ≥947 (≥11.9) | ≥955 (≥12) | 390-414 (49-52) | Material Datasheet |
| N54 | 1450-1490 (14.5-14.9) | ≥912 (≥11.5) | ≥955 (≥12) | 406-438 (51-55) | Material Datasheet |
| N56 | Project-specific | ≥860 (≥10.8) | ≥876 (≥11) | 422-454 (52-57) | Material Datasheet |
| 35M | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1114 (≥14) | 263-287 (33-36) | Material Datasheet |
| 38M | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1114 (≥14) | 287-310 (36-39) | Grade PDF |
| 40M | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1114 (≥14) | 302-326 (38-41) | Material Datasheet |
| 42M | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1114 (≥14) | 318-342 (40-43) | Material Datasheet |
| 45M | 1330-1370 (13.3-13.7) | ≥1002 (≥12.6) | ≥1114 (≥14) | 342-366 (43-46) | Material Datasheet |
| 48M | 1370-1400 (13.7-14.0) | ≥1027 (≥12.9) | ≥1114 (≥14) | 366-390 (46-49) | Material Datasheet |
| 50M | 1390-1430 (13.9-14.3) | ≥1035 (≥13.0) | ≥1114 (≥14) | 374-406 (47-51) | Material Datasheet |
| 52M | 1420-1460 (14.2-14.6) | ≥995 (≥12.5) | ≥1114 (≥14) | 390-414 (49-52) | Material Datasheet |
| 54M | 1450-1490 (14.5-14.9) | ≥995 (≥12.5) | ≥1114 (≥14) | 406-438 (51-55) | Material Datasheet |
| 30H | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥1353 (≥17) | 223-247 (28-31) | Material Datasheet |
| 33H | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥1353 (≥17) | 247-271 (31-34) | Material Datasheet |
| 35H | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1353 (≥17) | 263-287 (33-36) | Grade PDF |
| 38H | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1353 (≥17) | 287-310 (36-39) | Material Datasheet |
| 40H | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1353 (≥17) | 302-326 (38-41) | Grade PDF |
| 42H | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1353 (≥17) | 318-342 (40-43) | Material Datasheet |
| 45H | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥1353 (≥17) | 342-366 (43-46) | Grade PDF |
| 48H | 1370-1400 (13.7-14.0) | ≥1035 (≥13.0) | ≥1353 (≥17) | 366-390 (46-49) | Grade PDF |
| 50H | 1390-1430 (13.9-14.3) | ≥1058 (≥13.3) | ≥1353 (≥17) | 374-406 (47-51) | Grade PDF |
| 52H | 1420-1460 (14.2-14.6) | ≥1074 (≥13.5) | ≥1353 (≥17) | 390-414 (49-52) | Grade PDF |
| 54H | 1450-1490 (14.5-14.9) | ≥1074 (≥13.5) | ≥1274 (≥16) | 406-438 (51-55) | Material Datasheet |
| 30SH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥1592 (≥20) | 223-247 (28-31) | Material Datasheet |
| 33SH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥1592 (≥20) | 247-271 (31-34) | Material Datasheet |
| 35SH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1592 (≥20) | 263-287 (33-36) | Grade PDF |
| 38SH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1592 (≥20) | 287-310 (36-39) | Grade PDF |
| 40SH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1592 (≥20) | 302-326 (38-41) | Grade PDF |
| 42SH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1592 (≥20) | 318-342 (40-43) | Grade PDF |
| N42SH-HRE | 1310-1330 (13.1-13.3) | ≥1020 (≥12.8) | ≥1671 (≥21.0) | 333-341 (42.0-43.0) | Grade PDF |
| 45SH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥1592 (≥20) | 342-366 (43-46) | Grade PDF |
| 48SH | 1370-1400 (13.7-14.0) | ≥1035 (≥13.0) | ≥1592 (≥20) | 366-390 (46-49) | Grade PDF |
| 50SH | 1390-1430 (13.9-14.3) | ≥1058 (≥13.3) | ≥1592 (≥20) | 374-406 (47-51) | Grade PDF |
| 52SH | 1420-1460 (14.2-14.6) | ≥1074 (≥13.5) | ≥1512 (≥19) | 390-414 (49-52) | Material Datasheet |
| N54SH | 1460-1480 (14.6-14.8) | ≥1136 (≥14.3) | ≥1751 (≥22.0) | 413-421 (52.0-53.0) | Grade PDF |
| 28UH | 1040-1090 (10.4-10.9) | ≥780 (≥9.8) | ≥1990 (≥25) | 207-231 (26-29) | Grade PDF |
| 30UH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥1990 (≥25) | 223-247 (28-31) | Material Datasheet |
| 33UH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥1990 (≥25) | 247-271 (31-34) | Grade PDF |
| 35UH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥1990 (≥25) | 263-287 (33-36) | Grade PDF |
| 38UH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥1990 (≥25) | 287-310 (36-39) | Grade PDF |
| 40UH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥1990 (≥25) | 302-326 (38-41) | Grade PDF |
| 42UH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1990 (≥25) | 318-342 (40-43) | Grade PDF |
| 45UH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥1990 (≥25) | 342-366 (43-46) | Grade PDF |
| 48UH | 1360-1400 (13.6-14.0) | ≥1035 (≥13.0) | ≥1990 (≥25) | 358-390 (45-49) | Grade PDF |
| N52UH | 1440-1460 (14.4-14.6) | ≥1120 (≥14.1) | ≥2069 (≥26.0) | 402-410 (50.5-51.5) | Grade PDF |
| 28EH | 1040-1090 (10.4-10.9) | ≥780 (≥9.8) | ≥2388 (≥30) | 207-231 (26-29) | Material Datasheet |
| 30EH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥2388 (≥30) | 223-247 (28-31) | Grade PDF |
| 33EH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥2388 (≥30) | 247-271 (31-34) | Material Datasheet |
| 35EH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥2388 (≥30) | 263-287 (33-36) | Grade PDF |
| 38EH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥2388 (≥30) | 287-310 (36-39) | Grade PDF |
| 40EH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥2388 (≥30) | 302-326 (38-41) | Material Datasheet |
| 42EH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥2388 (≥30) | 318-342 (40-43) | Material Datasheet |
| 45EH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥2308 (≥29) | 342-366 (43-46) | Material Datasheet |
| N45AH | 1340-1350 (13.4-13.5) | ≥1039 (≥13.1) | ≥2865 (≥36.0) | 342-350 (43.0-44.0) | Grade PDF |
| N50EH | 1410-1430 (14.1-14.3) | ≥1097 (≥13.8) | ≥2467 (≥31.0) | 385-392 (48.5-49.2) | Grade PDF |
| 28TH | 1040-1090 (10.4-10.9) | ≥780 (≥9.8) | ≥2786 (≥35) | 207-231 (26-29) | Grade PDF |
| 30TH | 1080-1140 (10.8-11.4) | ≥827 (≥10.4) | ≥2786 (≥35) | 223-247 (28-31) | Material Datasheet |
| 33TH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥2786 (≥35) | 247-271 (31-34) | Material Datasheet |
| 35TH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥2786 (≥35) | 263-287 (33-36) | Grade PDF |
| 38TH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥2786 (≥35) | 287-310 (36-39) | Grade PDF |
| 40TH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥2786 (≥35) | 302-326 (38-41) | Material Datasheet |
| 42TH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥2706 (≥34) | 318-342 (40-43) | Grade PDF |
| G-52H | 1430-1460 (14.3-14.6) | ≥1074 (≥13.5) | ≥1353 (≥17) | 398-422 (50-53) | Material Datasheet |
| G-55H | 1460-1500 (14.6-15.0) | ≥1098 (≥13.8) | ≥1353 (≥17) | 421-446 (53-56) | Material Datasheet |
| G-48SH | 1370-1400 (13.7-14.0) | ≥1035 (≥13.0) | ≥1600 (≥20) | 366-390 (46-49) | Material Datasheet |
| G-50SH | 1400-1430 (14.0-14.3) | ≥1058 (≥13.3) | ≥1600 (≥20) | 374-406 (47-51) | Material Datasheet |
| G-52SH | 1430-1460 (14.3-14.6) | ≥1074 (≥13.5) | ≥1600 (≥20) | 398-422 (50-53) | Material Datasheet |
| G-55SH | 1460-1500 (14.6-15.0) | ≥1098 (≥13.8) | ≥1600 (≥20) | 421-446 (53-56) | Material Datasheet |
| G-42UH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥1990 (≥25) | 318-342 (40-43) | Material Datasheet |
| G-45UH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥1990 (≥25) | 342-366 (43-46) | Material Datasheet |
| G-48UH | 1370-1400 (13.7-14.0) | ≥1035 (≥13.0) | ≥1990 (≥25) | 366-390 (46-49) | Material Datasheet |
| G-50UH | 1400-1430 (14.0-14.3) | ≥1058 (≥13.3) | ≥1990 (≥25) | 374-406 (47-51) | Material Datasheet |
| G-52UH | 1430-1460 (14.3-14.6) | ≥1074 (≥13.5) | ≥1990 (≥25) | 398-422 (50-53) | Material Datasheet |
| G-33EH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥2388 (≥30) | 247-271 (31-34) | Material Datasheet |
| G-35EH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥2388 (≥30) | 263-287 (33-36) | Material Datasheet |
| G-38EH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥2388 (≥30) | 287-310 (36-39) | Material Datasheet |
| G-40EH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥2388 (≥30) | 302-326 (38-41) | Material Datasheet |
| G-42EH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥2388 (≥30) | 318-342 (40-43) | Material Datasheet |
| G-45EH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥2388 (≥30) | 342-366 (43-46) | Material Datasheet |
| G-48EH | 1370-1400 (13.7-14.0) | ≥1035 (≥13.0) | ≥2388 (≥30) | 366-390 (46-49) | Material Datasheet |
| G-50EH | 1400-1430 (14.0-14.3) | ≥1035 (≥13.0) | ≥2388 (≥30) | 374-406 (47-51) | Material Datasheet |
| G-33TH | 1140-1180 (11.4-11.8) | ≥860 (≥10.8) | ≥2785 (≥35) | 247-271 (31-34) | Material Datasheet |
| G-35TH | 1180-1230 (11.8-12.3) | ≥899 (≥11.3) | ≥2785 (≥35) | 263-287 (33-36) | Material Datasheet |
| G-38TH | 1230-1260 (12.3-12.6) | ≥923 (≥11.6) | ≥2785 (≥35) | 287-310 (36-39) | Material Datasheet |
| G-40TH | 1260-1290 (12.6-12.9) | ≥947 (≥11.9) | ≥2785 (≥35) | 302-326 (38-41) | Material Datasheet |
| G-42TH | 1290-1330 (12.9-13.3) | ≥971 (≥12.2) | ≥2785 (≥35) | 318-342 (40-43) | Material Datasheet |
| G-45TH | 1330-1370 (13.3-13.7) | ≥1003 (≥12.6) | ≥2706 (≥34) | 342-366 (43-46) | Material Datasheet |
| G-54H | 1440-1470 (14.4-14.7) | ≥1074 (≥13.5) | ≥1353 (≥17) | 398-422 (50-53) | Material Datasheet |
| G-56H | 1460-1500 (14.6-15.0) | ≥1074 (≥13.5) | ≥1274 (≥16) | 406-438 (51-55) | Material Datasheet |
| G-54SH | 1440-1470 (14.4-14.7) | ≥1074 (≥13.5) | ≥1592 (≥20) | 398-422 (50-53) | Material Datasheet |
| G-56SH | 1460-1480 (14.6-14.8) | ≥1035 (≥13.0) | ≥1512 (≥19) | 406-438 (51-55) | Material Datasheet |
| G-54UH | 1430-1470 (14.3-14.7) | ≥1035 (≥13.0) | ≥1910 (≥24) | 390-422 (49-53) | Material Datasheet |
Reference values support initial selection; the approved drawing and agreed specification govern supply.
Grade PDF links open a dedicated grade file. Material Datasheet links open the general material reference.
Reference edition 2026.09-R1 · Magnetic quantities and conversion tools
Application & grade guidance6 reference rows
6 rows
No matching results. Clear the filter or ask for selection help.
| Application | Typical Spec | Why this material |
|---|---|---|
| EV / BLDC Motors | N42SH–N48SH | High torque density in a compact rotor |
| Sensors & Encoders | N35–N42 | Strong stable field in small packages |
| Magnetic Separators | N42–N52 | High field gradient for particle capture |
| Wind Generators | N42SH–N48SH | High energy with elevated-temperature margin |
| Acoustic Devices | N35–N45 | Compact driver magnetic circuits |
| Magnetic Couplings | N38SH–N42SH | Torque transfer through sealed barriers |
Reference values support initial selection; the approved drawing and agreed specification govern supply.
Grade families & temperature classes7 reference rows
7 rows
No matching results. Clear the filter or ask for selection help.
| Class | Temperature review | Selection logic | Typical applications |
|---|---|---|---|
| Standard N | Confirm magnet-body profile | Maximum energy density where thermal margin is modest | Speakers, fixtures, sensors, general industrial |
| M | Confirm magnet-body profile | Moderate added coercivity | Compact motors, actuators |
| H | Confirm magnet-body profile | Higher demagnetization margin | Industrial motors, generators |
| SH | Confirm magnet-body profile | Candidate for elevated-temperature review | EV motors, wind generators, servos |
| UH | Confirm magnet-body profile | High-temperature compact magnetic circuits | EV/HEV, actuators, aerospace-related industrial systems |
| EH | Confirm magnet-body profile | Extreme thermal/demag margin | High-temperature motors and sensors |
| TH / AH | Confirm magnet-body profile | Special high-coercivity families | Application-specific high-temperature designs |
Reference values support initial selection; the approved drawing and agreed specification govern supply.
Geometry, machining & tolerances4 reference rows
4 rows
No matching results. Clear the filter or ask for selection help.
| Process | Typical Tolerance | Notes |
|---|---|---|
| As-sintered | Per agreed drawing | Most economical for non-critical faces |
| Sliced / profile-ground | Per agreed drawing | Standard for blocks and arc dimensions |
| Centerless / surface ground | Per agreed drawing | Mating faces and press-fit diameters |
| Parallelism / perpendicularity | Per drawing | Confirmed during DFM review |
Reference values support initial selection; the approved drawing and agreed specification govern supply.
Coatings & corrosion protection4 reference rows
4 rows
No matching results. Clear the filter or ask for selection help.
| Coating | Thickness requirement | Corrosion qualification | Typical Use |
|---|---|---|---|
| Ni-Cu-Ni | Project-specific | Agree method and criterion | General indoor / protected applications |
| Epoxy | Project-specific | Agree method and criterion | Humidity / marine-oriented protection |
| Zinc | Project-specific | Agree method and criterion | Cost-sensitive dry environments |
| Parylene C | Project-specific | Agree method and criterion | High-protection / specialty applications |
Reference values support initial selection; the approved drawing and agreed specification govern supply.
QUALITY & RELEASE
Specify Flux and Surface Acceptance.
Verification follows the component’s function and the agreed inspection plan.
Magnetic performance
Review details
Agree on the measured property, test method, sample quantity and acceptance band for Br, Hcj, flux, pull force or torque.
Temperature verification
Review details
For H, SH, UH or EH selections, define the temperature exposure and the post-exposure magnetic acceptance criterion.
Coating and corrosion
Review details
Confirm coating system, thickness range, adhesion method and environmental test requirement before production release.
Dimensional release
Review details
Identify critical faces, datum scheme, flatness, chamfer and coating allowance so the inspection report matches the drawing.
PRODUCT QUESTIONS
NdFeB Selection Questions.
Is N52 always the best choice?
No. The highest nominal energy product may not be the best choice once temperature, coercivity, cost, corrosion protection and working point are considered. We recommend selecting against the magnetic circuit and operating profile.
Can you supply high-temperature NdFeB?
High-temperature grades can be reviewed for the application. The suitable grade depends on the magnet temperature and required irreversible-loss margin; confirm the exact grade and limits during engineering review.
What should I send for a quotation?
A drawing, material or grade preference, magnetizing direction, operating temperature, environment, annual volume, first order quantity and any inspection or coating requirements.
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Review Your NdFeB Working Point.
Send the geometry, magnet temperature and target field or force.
Discuss This Specification