Corrosion Resistent Round Alnico Bar Magnet For Relays

Alnico Magnet Description:
Alnico magnets are made primarily from aluminum, nickel, cobalt, copper, iron and sometimes titanium. Among all the available magnetic materials, they have high magnetic flux density, resistance to corrosion and excellent temperature stability, the maximum working temperature up to 600℃.

There are two different manufacturing process for Alnico: Cast and Sintered Alnico. Cast Alnico can be made into intricate and complex shapes, which is not possible with other magnetic materials. Sintered Alnico is manufactured using a powder metallurgy process. while slightly weaker than cast alnico, It exhibits superior mechanical characteristics .

Competitive Advantages

 

1. Advanced techniques in producing long rods 

2. Tight tolerance as +/-0.01mm

3. Dimensional Stability

4. Comparatively high magnetic properties

5. Excellent temperature stability

6. Strong corrosion resistance

7. The maximum working temperature is up to 550°c

8. Excellent capacity

9. High density and magnetic properties

10.Cast AlNiCo magnets can be produced in relatively complex shapes

 
Round Alnico Bar Magnet Applications:

Sensors and transformers

Security  systems 

Relays

Instrumentations

Magnetic switches

Safety Controls
 

Size Specifications:
 

Diameter (MM)	Thickness/Height/Length (MM)
1.5-3.0	1.0-25.0
3.0-5.0	1.0-102.0
5.0-30.0	1.0-300.0
30.0-50.0	3.0-300.0
50.0-100.0	5.0-300.0
100.0-260.0	20.0-400.0

Physical Properties of Cast Alnico
Curie Temperature (℃)	760-890
Max. Operating Temperature (℃)	450-550
Resistivity (μohm.cm)	47-54
Hardness (Hv)	520-630
Density (g/cm³)	6.90-7.30
Relative Recoil Permeability (μrec)	1.70-4.70
Saturation Field Strength (kOe,kA/m)	2.7-6.3/215-500
Temperature Coefficient of Br (%/℃)	-0.025 ~ -0.02
Temperature Coefficient of iHc (%/℃)	+0.01 ~ +0.03

USA standard - permanent cast AlNiCo magnet industry standard of USA (MMPA)

Grade	Br		Hcb		Hcj		BHmax		Density	%change Per C	Tw Max	Remark
	kGs	mT	Oe	kA/m	Oe	kA/m	KJ/m3	MGOe	g/cm3	%K	℃
AlNiCo1	7.2	720	470	37	480	38	11.1	1.4	6.9	-0.03	450	Isotropic
AlNiCo2	7.5	750	560	45	580	46	13.5	1.7	7.1	-0.03	450
AlNiCo3	7.0	700	480	38	500	40	10.7	1.35	6.9	-0.03	450
AlNiCo5	12.8	1280	640	51	640	51	43.8	5.5	7.3	+0.02	525	Anisotropic
AlNiCo5DG	13.3	1330	670	53	670	53	57.7	6.5	7.3	+0.02	525
AlNiCo5-7	13.5	1350	740	59	740	59	59.7	7.5	7.3	+0.02	525
AlNiCo6	10.5	1050	780	62	800	64	31.0	3.9	7.3	+0.02	525
AlNiCo8	8.2	820	1650	131	1860	148	42.2	5.3	7.3	+0.02	550
AlNiCo8HC	7.2	720	1900	151	2170	173	39.8	5.0	7.3	+0.02	550
AlNiCo9	10.6	1060	1500	119	1500	119	71.6	9.0	7.3	+0.02	550

 
Typical Magnetic Performance Range for Cast Alnico Magnet, other standard

Grade	Br		Hcj		BHmax		USA stand	IEC stand	DIN stand	UK stand
	kGs	mT	Oe	kA/m	KJ/m3	MGOe	MMPA	IEC	DE	UK
LN10	6.5	650	530	42	10	1.2	AlNiCo3	AlNiCo9/3	/	/
LNG11	7.2	720	480	37	11.2	1.4	AlNiCo1	AlNiCo8/4	AlNiCo120	AlNi
LNG13	7.0	700	620	50	13	1.6	AlNiCo2	AlNiCo12/6	AlNiCo160	AlNiCo
LNGT18	5.8	580	1250	100	18	2.2	I. AlNiCo 8	AlNiCo17/9	/	/
LNG16	8.0	800	660	53	16	2.0	[AlNiCo4]	/	/	/
LNG34	11.8	1180	550	44	34	4.25	[AlNiCo5C]	/	/	/
LNG37	12.0	1200	600	48	37	4.65		AlNiCo37/5	AlNiCo500	Alcomax2
LNG40	12.2	1220	630	50	40	5.0	AlNiCo5	/		/
LNG44	12.5	1250	650	52	44	5.5		AlNiCo44/5		Alcomax3
LNG52	13.0	1300	690	55	52	6.5	AlNiCo5DG	AlNiCo52/6	AlNiCo600	Alcomax3 S.C.
LNG60	13.3	1330	750	60	60	7.5	AlNiCo5-7	/	AlNiCo700	Columax
LNGT28	10.5	1050	700	56	28	3.5	AlNiCo6	AlNiCo26/6	AlNiCo400	Alcomax4
LNGT30	10.5	1050	750	60	30	3.75
LNGT32	8.0	800	1280	102	32	4.0	AlNiCo8	AlNiCo38/11	AlNiCo350	Hycomax2
LNGT40	8.2	820	1400	112	40	5.0
LNGT44	8.8	880	1540	123	44	5.5	AlNiCo8B	/	AlNiCo450	Hycomax3
LNGT48A	9.3	930	1540	123	48	6.0	AlNiCo8HE
LNGT48B	8.5	850	1650	132	48	6.0
LNGT60	9.0	900	1380	110	60	7.5		AlNiCo60/11	/	/
LNGT72	10.5	1050	1410	112	72	9.0	AlNiCo9	/	/	/
LNGT80	10.8	1080	1540	123	80	10.0
LNGT88	11.0	1100	1575	126	88	11.0
LNGT92	11.5	1150	1575	126	92	11.5
LNGT36J	7.0	700	1750	140	36	4.5	AlNiCo8HC	AlNiCo36/15	/	/
LNGT40J	7.2	720	1900	152	40	5.0
LNGT44J	8.2	820	1800	144	44	5.5		AlNiCo44/15	/	/

 
Cast Alnico Process Chart
Raw material -> forming- >smelting-> heat treatment-> surface treatment->precision grinding->inspection ->packing

Sintered Alnico Process Chart
Raw material ->powder-> forming-> sintered- >heat treatment-> surface treatment->precision grinding –>inspection- >packing