NdFeB Magnet Grades

NdFeB grade names help compare magnetic material options, but the grade alone does not tell you the field or holding force of a finished part. Those results also depend on the magnet’s dimensions, magnetization direction, working gap and surrounding magnetic circuit.

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How to read an NdFeB grade

In a designation such as N42 or N52, the number indicates an approximate maximum energy product class, commonly expressed in MGOe. A higher number within the same grade family generally indicates higher energy product. It does not mean every N52 magnet will outperform every N42 magnet in an application.

Suffixes such as M, H, SH, UH, EH and AH identify material families with different intrinsic coercivity and temperature characteristics. They are useful when screening grades for heat exposure, but they are not a guaranteed operating-temperature limit for your finished magnet. Size, shape and the magnetic circuit affect demagnetization risk.

Use the chart as a starting point

The table below lists indicative magnetic properties for selected NdFeB grades. Treat its “Max Working Temp.” column as a reference value, not an application guarantee. Confirm the exact grade data, operating point and test conditions for the part you intend to order. Grades shown in the table do not imply that every grade is available for every geometry or quantity.

What to send for a grade review

Share a drawing or finished dimensions and tolerances, target field or force at the working gap, maximum and minimum operating temperature, magnetization direction, coating environment, quantity and any inspection requirement. If you have an existing grade, include it. These details help us review a suitable material and quote the specific part.

MagnetsTek Engineering NdFeB Magnet Grades

Grade	Remanence Induction/Br.		Coercive Force/HcB		Intrinsic Coercive Force/HcJ		Maximum Energy Product/(BH)max		Max Working Temp.	Curie Temp.
	T	KGs	KA/m	KOe	KA/m	KOe	KJ/m³	MGOe	°C/°F	°C/°F
N35	1.17-1.21	11.7-12.1	≥876	≥11	≥955	≥12	263-279	33-35	80/176	310/590
N38	1.23-1.30	12.3-13.0	≥876	≥11	≥955	≥12	287-318	36-40	80/176	310/590
N40	1.26-1.32	12.6-13.2	≥876	≥11	≥955	≥12	302-334	38-42	80/176	310/590
N42	1.29-1.35	12.9-13.5	≥876	≥11	≥955	≥12	318-350	40-44	80/176	310/590
N45	1.32-1.38	13.2-13.8	≥876	≥11	≥955	≥12	334-366	42-46	80/176	310/590
N48	1.37-1.43	13.7-14.3	≥876	≥11	≥955	≥12	358-390	45-49	80/176	310/590
N50	1.40-1.45	14.0-14.5	≥876	≥11	≥955	≥12	374-406	47-51	70/158	310/590
N52	1.42-1.48	14.2-14.8	≥836	≥10.5	≥876	≥11	390-422	49-53	70/158	310/590
N54	1.45-1.49	14.5-14.9	≥836	≥10.5	≥955	≥12	406-437	51-55	80/176	310/590
N56	1.47-1.51	14.7-15.1	≥836	≥10.5	≥876	≥11	414-454	52-57	80/176	310/590
N35M	1.17-1.21	11.7-12.1	≥892	≥11.2	≥1114	≥14	263-279	33-35	100/212	340/644
N38M	1.23-1.30	12.3-13.0	≥915	≥11.5	≥1114	≥14	287-318	36-40	100/212	340/644
N40M	1.26-1.32	12.6-13.2	≥939	≥11.8	≥1114	≥14	302-334	38-42	100/212	340/644
N42M	1.29-1.35	12.9-13.5	≥963	≥12.1	≥1114	≥14	318-350	40-44	100/212	340/644
N45M	1.32-1.38	13.2-13.8	≥987	≥12.4	≥1114	≥14	334-366	42-46	100/212	340/644
N48M	1.37-1.43	13.7-14.3	≥1019	≥12.8	≥1114	≥14	358-390	45-49	100/212	340/644
N50M	1.40-1.45	14.0-14.5	≥1043	≥13.1	≥1114	≥14	374-406	47-51	100/212	340/644
N52M	1.42-1.48	14.2-14.8	≥1059	≥13.3	≥1114	≥14	390-422	49-53	100/212	340/644
N33H	1.14-1.17	11.4-11.7	≥820	≥10.3	≥1353	≥17	247-263	31-33	120/248	340/644
N35H	1.17-1.24	11.7-12.4	≥876	≥11.0	≥1353	≥17	263-295	33-37	120/248	340/644
N38H	1.23-1.30	12.3-13.0	≥915	≥11.5	≥1353	≥17	286-318	36-40	120/248	340/644
N40H	1.26-1.32	12.6-13.2	≥939	≥11.8	≥1353	≥17	302-334	38-42	120/248	340/644
N42H	1.29-1.35	12.9-13.5	≥963	≥12.1	≥1353	≥17	318-350	40-44	120/248	340/644
N45H	1.32-1.38	13.2-13.8	≥987	≥12.4	≥1353	≥17	334-366	42-46	120/248	340/644
N48H	1.37-1.43	13.7-14.3	≥1011	≥12.7	≥1353	≥17	358-390	45-49	120/248	340/644
N50H	1.40-1.45	14.0-14.5	≥1027	≥12.9	≥1353	≥17	374-406	47-51	120/248	340/644
N30SH	1.08-1.12	10.8-11.2	≥804	≥10.1	≥1592	≥20	223-239	28-30	150/302	340/644
N33SH	1.14-1.21	11.4-12.1	≥852	≥10.7	≥1592	≥20	247-279	31-35	150/302	340/644
N35SH	1.17-1.24	11.7-12.4	≥876	≥11.0	≥1592	≥20	263-295	33-37	150/302	340/644
N38SH	1.23-1.29	12.3-12.9	≥915	≥11.5	≥1592	≥20	287-318	36-40	150/302	340/644
N40SH	1.26-1.32	12.6-13.2	≥939	≥11.8	≥1592	≥20	302-334	38-42	150/302	340/644
N42SH	1.29-1.35	12.9-13.5	≥963	≥12.1	≥1592	≥20	318-350	40-44	150/302	340/644
N45SH	1.32-1.38	13.2-13.8	≥987	≥12.4	≥1592	≥20	334-366	42-46	150/302	340/644
N48SH	1.37-1.43	13.7-14.3	≥1011	≥12.7	≥1592	≥20	358-390	45-49	150/302	340/644
N50SH	1.40-1.45	14.0-14.5	≥1027	≥12.9	≥1592	≥20	374-406	47-51	150/302	340/644
N28UH	1.04-1.08	10.4-10.8	≥780	≥9.8	≥1990	≥25	207-223	26-28	180/356	350/662
N30UH	1.08-1.13	10.8-11.3	≥796	≥10.0	≥1990	≥25	223-255	28-31	180/356	350/662
N33UH	1.14-1.18	11.4-11.8	≥852	≥10.5	≥1990	≥25	247-279	31-35	180/356	350/662
N35UH	1.17-1.24	11.7-12.4	≥876	≥11.0	≥1990	≥25	263-295	33-37	180/356	350/662
N38UH	1.23-1.29	12.3-12.9	≥915	≥11.5	≥1990	≥25	287-318	36-40	180/356	350/662
N40UH	1.26-1.32	12.6-13.2	≥939	≥11.8	≥1990	≥25	302-334	38-42	180/356	350/662
N42UH	1.28-1.35	12.8-13.5	≥963	≥12.1	≥1990	≥25	310-350	39-44	180/356	350/662
N45UH	1.32-1.38	13.2-13.8	≥987	≥12.4	≥1990	≥25	334-366	42-46	180/356	350/662
N48UH	1.37-1.42	13.7-14.2	≥1019	≥12.8	≥1910	≥24	358-390	45-49	180/356	350/662
N30EH	1.08-1.15	10.8-11.5	≥812	≥10.2	≥2388	≥30	223-255	28-32	200/392	350/662
N33EH	1.14-1.21	11.4-12.1	≥851	≥10.7	≥2388	≥30	247-279	31-35	200/392	350/662
N35EH	1.17-1.24	11.7-12.4	≥876	≥11.0	≥2388	≥30	263-295	33-37	200/392	350/662
N38EH	1.23-1.29	12.3-12.9	≥915	≥11.5	≥2388	≥30	287-318	36-40	200/392	350/662
N40EH	1.26-1.32	12.6-13.2	≥939	≥11.8	≥2388	≥30	302-334	38-42	200/392	350/662
N42EH	1.28-1.35	12.8-13.5	≥963	≥12.1	≥2388	≥30	310-350	39-44	200/392	350/662
N45EH	1.33-1.38	13.3-13.8	≥995	≥12.5	≥2308	≥29	334-366	42-46	200/392	350/662
N28AH	1.04-1.12	10.4-11.2	≥772	≥9.7	≥2786	≥35	207-239	26-30	230/446	350/662
N30AH	1.08-1.15	10.8-11.5	≥812	≥10.2	≥2786	≥35	223-255	28-32	230/446	350/662
N33AH	1.14-1.21	11.4-12.1	≥852	≥10.7	≥2786	≥35	247-279	31-35	230/446	350/662
N35AH	1.17-1.24	11.7-12.4	≥876	≥11.0	≥2786	≥35	263-295	33-37	230/446	350/662
N38AH	1.23-1.27	12.3-12.7	≥923	≥11.6	≥2786	≥35	287-318	36-40	230/446	350/662
N40AH	1.26-1.31	12.6-13.1	≥939	≥11.8	≥2628	≥33	302-334	38-42	230/446	350/662
N30TH	1.08-1.13	10.8-11.3	820	10.3	≥3182	≥40	223-247	28-31	250/482	350/662
N33TH	1.11-1.17	11.1-11.7	851	10.7	≥3182	≥40	239-271	31-34	250/482	350/662
N35TH	1.17-1.22	11.7-12.2	867	10.9	≥3182	≥40	263-287	33-36	250/482	350/662

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NdFeB Magnet Grades