Grades and properties of sintered NdFeB permanent magnets

Sintered NdFeB permanent magnets can be divided into seven series according to the different intrinsic coercivity HcJ: N, M, H, SH, UH, EH and AH(TH), and each series is subdivided according to the magnitude of the magnet remanence Br and the maximum magnetic energy product BH (max).

▪ The number represents the maximum energy product (BH) max of the product, and the higher the number, the larger the maximum energy product

▪ The letters represent the classification of intrinsic coercivity, and the later the series, the greater the intrinsic coercivity

STANDARD SPECIFICATION FOR SINTERED NdFeB MAGNETS
类别 Item	牌号 Grade	剩磁 Remanence(Br)		磁感矫顽力 (Hcb)		内禀矫顽力 (Hcj)		((BH)m)最大磁能积 Product		工作温度 Tempe	温度系数 Temp Coeff		方形度 square degree
		kGs	T	kOe	kA/m	koe	kA/m	MGOe	kJ/m³	L/D=0.7(℃)	α（Br）	β（Hcj）	HK/HCJ %
		kGs	T	kOe	kA/m	koe	kA/m	MGOe	kJ/m³	L/D=0.7(℃)	%/K	%/K	HK/HCJ %
N	N35	11.8-12.3	1.18-1.23	≥10.8	≥860	≥12	≥955	33-36	263-287	≤80	-0.12	-0.65	95
	N38	12.3-12.8	1.23-1.28	≥10.8	≥860	≥12	≥955	36-39	287-310	≤80	-0.12	-0.65	95
	N40	12.6-13.1	1.26-1.31	≥10.8	≥860	≥12	≥955	38-41	302-326	≤80	-0.12	-0.65	95
	N42	12.9-13.4	1.29-1.34	≥10.8	≥860	≥12	≥955	40-43	318-342	≤80	-0.12	-0.65	95
	N45	13.3-13.8	1.33-1.38	≥10.8	≥860	≥12	≥955	43-46	342-366	≤80	-0.12	-0.65	95
	N48	13.7-14.2	1.37-1.42	≥10.5	≥836	≥12	≥955	45-49	358-390	≤80	-0.12	-0.65	95
	N50	13.9-14.4	1.39-1.44	≥10.5	≥836	≥12	≥955	47-51	374-406	≤80	-0.12	-0.65	95
	N52	14.2-14.7	1.42-1.47	≥10.5	≥836	≥12	≥955	49-53	390-422	≤80	-0.12	-0.65	95
	N54	14.5-15.0	1.45-1.50	≥10.5	≥836	≥11	≥875	51-55	406-438	≤80	-0.12	-0.65	95
	N55	14.7-15.2	1.47-1.52	≥10.5	≥836	≥11	≥875	52-56	414-446	≤60	-0.12	-0.65	95
M	38M	12.3-12.8	1.23-1.28	≥11	≥876	≥14	≥1114	36-39	287-310	≤100	-0.12	-0.6	95
	40M	12.6-13.1	1.26-1.31	≥11.4	≥910	≥14	≥1114	38-41	302-326	≤100	-0.12	-0.6	95
	42M	12.9-13.4	1.29-1.34	≥11.8	≥938	≥14	≥1114	40-43	318-342	≤100	-0.12	-0.6	95
	45M	13.3-13.8	1.33-1.38	≥12.2	≥971	≥14	≥1114	43-46	342-366	≤100	-0.12	-0.6	95
	48M	13.7-14.2	1.37-1.42	≥12.7	≥1012	≥14	≥1114	45-49	358-390	≤100	-0.12	-0.6	95
	50M	13.9-14.4	1.39-1.44	≥13.1	≥1043	≥14	≥1114	47-51	374-406	≤100	-0.12	-0.6	95
	52M	14.2-14.7	1.42-1.47	≥13.1	≥1043	≥13	≥1035	49-53	390-422	≤100	-0.12	-0.6	95
	54M	14.4-14.9	1.44-1.49	≥13.1	≥1043	≥13	≥1035	50-55	398-438	≤100	-0.12	-0.6	95
	56M	14.6-15.0	1.46-1.50	≥13.1	≥1043	≥13	≥1035	51-56	406-446	≤100	-0.12	-0.6	95
H	35H	1.18-1.23	1.18-1.23	≥11.0	≥876	≥17	≥1353	33-36	263-287	≤120	-0.11	-0.55	95
	38H	12.3-12.8	1.23-1.28	≥11.4	≥910	≥17	≥1353	36-39	287-310	≤120	-0.11	-0.55	95
	40H	12.6-13.1	1.26-1.31	≥11.7	≥930	≥17	≥1353	38-41	302-326	≤120	-0.11	-0.55	95
	42H	12.9-13.4	1.29-1.34	≥12	≥957	≥17	≥1353	40-43	318-342	≤120	-0.11	-0.55	95
	45H	13.3-13.8	1.33-1.38	≥12.5	≥995	≥17	≥1353	43-46	342-366	≤120	-0.11	-0.55	95
	48H	13.7-14.2	1.37-1.42	≥12.8	≥1000	≥16	≥1274	45-49	358-390	≤120	-0.11	-0.55	95
	50H	13.9-14.4	1.39-1.44	≥13	≥1035	≥16	≥1274	47-51	374-406	≤120	-0.11	-0.55	95
	52H	14.2-14.7	1.42-1.47	≥13.1	≥1042	≥16	≥1274	49-53	390-422	≤120	-0.11	-0.55	95
	54H	14.4-14.9	1.44-1.49	≥13.5	≥1075	≥16	≥1274	50-55	398-438	≤120	-0.11	-0.55	95
	56H	14.6-15.0	1.46-1.50	≥13.7	≥1091	≥16	≥1274	52-56	422-454	≤120	-0.11	-0.55	95
SH	33SH	11.4-11.9	1.14-1.19	≥10.5	≥836	≥20	≥1592	31-34	247-271	≤150	-0.11	-0.55	95
	35SH	11.8-12.3	1.18-1.23	≥11	≥876	≥20	≥1592	33-36	263-287	≤150	-0.11	-0.55	95
	38SH	12.3-12.8	1.23-1.28	≥11.1	≥886	≥20	≥1592	36-39	287-310	≤150	-0.11	-0.55	95
	40SH	12.6-13.1	1.26-1.31	≥11.5	≥912	≥20	≥1592	38-41	302-326	≤150	-0.11	-0.55	95
	42SH	12.9-13.4	129-1.34	≥12.2	≥971	≥20	≥1592	40-43	318-342	≤150	-0.11	-0.55	95
	45SH	13.3-13.8	1.33-1.38	≥12.5	≥995	≥20	≥1592	43-46	342-366	≤150	-0.11	-0.55	95
	48SH	13.7-14.2	1.37-1.42	≥12.8	≥1035	≥19	≥1512	45-49	358-390	≤150	-0.11	-0.55	95
	50SH	13.9-14.4	1.39-1.44	≥13.1	≥1042	≥19	≥1512	46-51	366-406	≤150	-0.11	-0.55	95
	52SH	14.2-14.7	1.42-1.47	≥13.3	≥1059	≥19	≥1512	49-53	390-422	≤150	-0.11	-0.55	95
	54SH	14.4-14.9	1.44-1.49	≥13.5	≥1075	≥19	≥1512	50-55	398-438	≤150	-0.11	-0.55	95
	56SH	14.6-15.0	1.46-1.50	≥13.7	≥1091	≥19	≥1512	52-56	422-454	≤150	-0.11	-0.55	95
UH	33UH	11.4-11.9	1.14-1.19	≥10.3	≥816	≥25	≥1990	31-34	247-271	≤180	-0.11	-0.51	95
	35UH	11.8-12.3	1.18-1.23	≥10.6	≥845	≥25	≥1990	33-36	263-287	≤180	-0.11	-0.51	95
	38UH	12.3-12.8	1.23-1.28	≥11.1	≥866	≥25	≥1990	36-39	287-310	≤180	-0.11	-0.51	95
	40UH	12.6-13.1	1.26-1.31	≥11.5	≥912	≥25	≥1990	38-41	302-326	≤180	-0.11	-0.51	95
	42UH	12.9-13.4	1.29-1.34	≥11.8	≥938	≥25	≥1990	40-43	318-342	≤180	-0.11	-0.51	95
	45UH	13.3-13.8	1.33-1.38	≥12.2	≥976	≥24	≥1911	43-46	342-366	≤180	-0.11	-0.51	95
	48UH	13.6-14.1	1.36-1.41	≥12.2	≥976	≥24	≥1911	45-49	358-390	≤180	-0.11	-0.51	95
	50UH	13.9-14.4	1.39-1.44	≥12.8	≥1035	≥24	≥1911	46-51	366-406	≤180	-0.11	-0.51	95
	52UH	14.2-14.7	1.42-1.47	≥13.1	≥1042	≥24	≥1911	49-53	390-422	≤180	-0.11	-0.51	95
	54UH	14.4-14.9	1.44-1.49	≥13.5	≥1075	≥24	≥1911	51-55	406-438	≤180	-0.11	-0.51	95
EH	30EH	10.8-11.4	1.08-1.14	≥9.5	≥756	≥30	≥2388	28-31	223-247	≤200	-0.11	-0.48	95
	33EH	11.4-11.9	1.14-1.19	≥10.3	≥816	≥30	≥2388	31-34	247-271	≤200	-0.11	-0.48	95
	35EH	11.8-12.3	1.18-1.23	≥11.1	≥883	≥30	≥2388	33-36	263-287	≤200	-0.11	-0.48	95
	38EH	12.2-12.7	1.22-1.27	≥11.6	≥923	≥30	≥2388	35-39	279-310	≤200	-0.11	-0.48	95
	40EH	12.5-13.0	1.28-1.30	≥11.9	≥947	≥30	≥2388	37-41	295-326	≤200	-0.11	-0.48	95
	42EH	12.8-13.3	1.28-1.33	≥12.2	≥971	≥29	≥2308	39-43	310-342	≤200	-0.11	-0.48	95
	45EH	13.2-13.7	1.32-1.37	≥12.5	≥995	≥29	≥2308	41-46	326-366	≤200	-0.11	-0.48	95
	48EH	13.6-14.1	1.36-1.41	≥12.9	≥1027	≥29	≥2308	45-49	358-390	≤200	-0.11	-0.48	95
	50EH	13.9-14.4	1.39-1.44	≥13.1	≥1043	≥29	≥2308	47-51	374-406	≤200	-0.11	-0.48	95
AH	28AH	10.2-10.8	10.2-10.8	≥9.8	≥780	≥34	≥2706	25-28	207-231	≤230	-0.11	-0.45	95
	30AH	10.7-11.3	10.7-11.3	≥10.2	≥812	≥34	≥2706	27-31	215-247	≤230	-0.11	-0.45	95
	33AH	11.1-11.7	11.1-11.7	≥10.3	≥820	≥34	≥2706	30-34	239-271	≤230	-0.11	-0.45	95
	35AH	11.7-12.2	11.7-12.2	≥10.5	≥836	≥34	≥2706	33-36	263-287	≤230	-0.11	-0.45	95
	38AH	12.2-12.5	12.2-12.5	≥10.5	≥836	≥34	≥2706	35-39	279-310	≤230	-0.11	-0.45	95

Grades and properties of sintered NdFeB permanent magnets

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