Low grade magnet steel (N series / M series / H series)
Low grade magnet steel (N series / M series / H series) Certifications




Low grade magnet steel (N series / M series / H series) Performance Advantages
- High precision
- Good corrosion resistance
Low grade magnet steel (N series / M series / H series) Application fields

Mobile Phone Shield

IT Communication
Low grade magnet steel (N series / M series / H series) Performance parameterdownload
No | Grade | Magnetic properties of N-series Magnet |
Max Working Temp Tw(℃) | |||
Remanence,Br mT or kGs | Coercivity,Hcb kA/m or kOe | Intrinsic Coercivity,Hcj kA/m or kOe | Maximium Energy Product,(BH)max kJ/m³ or kOe | |||
1 | N55 | 1470-1530(14.7-15.3) | ≥860(≥10.8) | ≥876(≥11) | 414-438(52-56) | 80 |
2 | N52 | 1430-1480(14.3-14.8) | ≥860(≥10.8) | ≥955(≥12) | 398-422(50-53) | 80 |
3 | N50 | 1400-1450(14.0-14.5) | ≥860(≥10.8) | ≥955(≥12) | 382-406(48-51) | 80 |
4 | N48 | 1380-1420(13.8-14.2) | ≥836(≥10.5) | ≥955(≥12) | 366-390(46-49) | 80 |
5 | N45 | 1320-1380(13.2-13.8) | ≥876(≥11.0) | ≥955(≥12) | 342-366(43-46) | 80 |
6 | N42 | 1280-1320(12.8-13.2) | ≥923(≥11.6) | ≥955(≥12) | 318-342(40-43) | 80 |
7 | N40 | 1250-1280(12.5-12.8) | ≥923(≥11.6) | ≥955(≥12) | 302-326(38-41) | 80 |
8 | N38 | 1220-1250(12.5-12.8) | ≥899(≥11.3) | ≥955(≥12) | 287-310(36-39) | 80 |
9 | N35 | 1170-1210(11.7-12.2) | ≥868(≥10.9) | ≥955(≥12) | 263-287(33-36) | 80 |
10 | N33 | 1130-1180(11.3-11.8) | ≥836(≥10.5) | ≥955(≥12) | 247-270(31-34) | 80 |
11 | N30 | 1080-1130(10.8-11.3) | ≥796(≥10) | ≥955(≥12) | 223-247(28-31) | 80 |
No | Grade | Magnetic properties of M-series Magnet |
Max Working Temp Tw(℃) | |||
Remanence,Br mT or kGs | Coercivity,Hcb kA/m or kOe | Intrinsic Coercivity,Hcj kA/m or kOe | Maximium Energy Product,(BH)max kJ/m³ or kOe | |||
1 | N52M | 1430-1480(14.3-14.8) | ≥1035(≥13.0) | ≥1114(≥14) | 398-422(50-53) | 100 |
2 | N50M | 1400-1450(14.0-14.5) | ≥1035(≥13.0) | ≥1114(≥14) | 382-406(48-51) | 100 |
3 | N48M | 1380-1430(13.8-14.3) | ≥1027(≥12.9) | ≥1114(≥14) | 366-390(46-49) | 100 |
4 | N45M | 1330-1380(13.3-13.8) | ≥995(≥12.5) | ≥1114(≥14) | 342-366(43-46) | 100 |
5 | N42M | 1280-1330(12.8-13.3) | ≥955(≥12.0) | ≥1114(≥14) | 318-342(40-43) | 100 |
6 | N40M | 1250-1280(12.5-12.8) | ≥923(≥11.6) | ≥1114(≥14) | 302-326(38-41) | 100 |
7 | N38M | 1220-1250(12.2-12.5) | ≥899(≥11.3) | ≥1114(≥14) | 287-310(36-39) | 100 |
8 | N35M | 1170-1220(11.7-12.2) | ≥868(≥10.9) | ≥1114(≥14) | 263-287(33-36) | 100 |
9 | N33M | 1130-1180(11.3-1.8) | ≥836(≥10.5) | ≥1114(≥14) | 247-270(31-34) | 100 |
10 | N30M | 1080-1130(10.8-11.3) | ≥796(≥10) | ≥1114(≥14) | 223-247(28-31) | 100 |
No | Grade | Magnetic properties of H-series Magnet |
Max Working Temp Tw(℃) | |||
Remanence,Br mT or kGs | Coercivity,Hcb kA/m or kOe | Intrinsic Coercivity,Hcj kA/m or kOe | Maximium Energy Product,(BH)max kJ/m³ or kOe | |||
1 | N52H | 1420-1470(14.2-14.7) | ≥1050(≥13.2) | ≥1353(≥17) | 398-422(50-53) | 120 |
2 | N50H | 1400-1450(14.0-14.5) | ≥1035(≥13.0) | ≥1353(≥17) | 382-406(48-51) | 120 |
3 | N48H | 1380-1430(13.8-14.3) | ≥1035(≥13.0) | ≥1353(≥17) | 366-390(46-49) | 120 |
4 | N45H | 1330-1380(13.3-13.8) | ≥1010(≥12.7) | ≥1353(≥17) | 342-366(43-46) | 120 |
5 | N42H | 1280-1330(12.8-13.3) | ≥995(≥12.5) | ≥1353(≥17) | 318-342(40-43) | 120 |
6 | N40H | 1250-1280(12.5-12.8) | ≥940(≥11.8) | ≥1353(≥17) | 302-326(38-41) | 120 |
7 | N38H | 1220-1250(12.2-12.5) | ≥899(≥11.3) | ≥1353(≥17) | 287-310(36-39) | 120 |
8 | N35H | 1170-1220(11.7-12.2) | ≥876(≥11.0) | ≥1353(≥17) | 263-287(33-36) | 120 |
9 | N33H | 1130-1180(11.3-1.8) | ≥844(≥10.6) | ≥1353(≥17) | 247-271(31-34) | 120 |
10 | N30H | 1080-1130(10.8-11.3) | ≥812(≥10.2) | ≥1353(≥17) | 223-247(28-31) | 120 |
Coating Type | Color | Thickness/um | SST/h | PCT/h | Working Temp/℃ | Performance features |
Blue Zn | Blue/White | 5-10 | ≥48 | – | <160 | Medium corrosion resistance performance |
Color Zn | Multiple colors | 5-10 | ≥72 | – | <160 | Medium corrosion resistance performance |
NICUNI | Silver white | 10-30 | ≥72 | ≥96 | <200 | High corrosion resistance,thermal resistance and moisture resistance |
PVD Aluminium | Silver white | 5-25 | ≥96 | ≥240 | <390 | High corrosion resistance and adhesiveness |
Phosphate | – | – | – | – | <250 | Low cost,low corrosion resistance performance |
Epoxy | Black/Grey | 10-30 | ≥480 | ≥96 | <180 | High corrosion resistance and insulation performance |
Multi-layer coating | – | – | ≥1000 | ≥480 | – | Excellent corrosion resistance performance |
Notes
This performance might vary according to different dimension of product.
Multi-layer coating is a combination of different type of coatings, and its color,thickness and working temperature might varies from different combinations.
PCT test conditions: 121 celcius degrees, 100% humidity,2atms HAST test condition:132 celcius dergees, 95% humidity,2.7atms(mainly for evaluation of material weight loss)
HAST (Highly Accelerated Stress Test) condition: 132 celcius degrees, 95% humidity,2.7atms(mainly for evaluation of material weight loss)
Low grade magnet steel (N series / M series / H series) Production Process
The production process of NdFeB:
Ingredients → Quick setting → Hydrogen crushing → Jet mill → Forming → Sintering & aging → Inspection → Finish
Grain boundary diffusion → surface treatment → inspection → packaging → delivery
Low grade magnet steel (N series / M series / H series) Executive Standard
ISO9001、ISO14001、IATF16949、ISO45001
Low grade magnet steel (N series / M series / H series) Production Equipments

Automatic spraying coating line

Jet milling

Multiple wire cutting

Hydrogen decrepitation furnace

Continuous sintering stove

Strip casting furnace

AMT-4A magnetic property measurement equipment
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EHS-222MD HAST (Japan)
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HELOS-BFS LASER particle size measurement equipment (Germany)
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HIRST-PFM12 pulse magnetic measurement equipment (UK)
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PSL-2J High-Low temperature environment testing equpment (Japan)

SP3020 Automatic image measuring apparatus
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UItima Expert Plasma Spectrometer (France)
Related Products


Double high grade magnet steel (high remanence / high coercive force)
With the continuous strengthening of the protection of rare earth resources and the development of downstream applications, sintered NdFeB magnetic steel is facing new challenges. Ketian Magnet's Shuanggao grade magnetic steel adopts the latest grain boundary diffusion process and obtains the characteristics of double high remanence and coercivity with limited heavy rare earth input. Used in new energy vehicle drive motor (HEV / EV), inverter air conditioner compressor, various servo motors and other industries. While continuously developing high-end products, it also contributes to the protection of rare earth resources.