Sintered NdFeB Magnets
Bonded NdFeB Magnets
AlNiCo Magnets
SmCo Magnets
Ferrite Magnets
Flexible Magnets
Magnetic Mounting Pot
Magnetic Lifter
Magnetic Filter
Classical Magnetic Assembly
Evermag Magnets Ltd
NO.68 East Section Yinxian Road Ningbo China,315153
Tel:86 574 87435893
Fax:86 574 56877596
Email: 
info@evermagnets.com
Website: www.evermagnets.com
 
Your Location: Home >> Products List >> SmCo Magnets


General Information

Well known as Rare Earth magnets, Samarium Cobalt (SmCo) is alloys of the Lanthanide group of elements, which is first kind of commercialized permanent magnet materials from early 1980’s. SmCo magnets are available in a number of different grades that span a wide range of properties and application requirements.
SmCo magnets are brittle and machining operations should be performed prior to magnetization, using diamond tools. We are equipped to fabricate these materials to blueprint specifications.
SmCo magnets are anisotropic, and can only be magnetized in the orientation direction. In general, magnetizing fields of about 35 to 45 kOe are required to saturate SmCo materials.

Assemblies

We are able to manufacture metal and other components of finished sub assemblies using our CNC machining facilities.
Assemblies can be fabricated by adhering magnets with adhesives to suit a range of environments, by mechanically fastening magnets, or by a combination of these methods. Due to the relatively brittle nature of these magnet materials,press fits are not recommended.
When multiple magnets are assembled in repelling positions, it is advisable to use mechanical fastening in addition to adhesives, since if adhesives were to give way, repelling magnets may dislodge and endanger personnel using them. Our design engineering team will be happy to assist you in designing both magnetic circuits and housings for your magnet assemblies.

Surface Treatments

The corrosion resistance of SmCo is considered good . Coatings for corrosion resistance are therefore not generally required for SmCo magnets.However,sometimes we supply SmCo magnets with Ni coating according to customers’ requirements.

Machining

SmCo is extremely brittle, and highly prone to chipping and cracking. Special machining techniques, involving diamond-grinding techniques, must be used to machine this material. We are fully equipped to machine these materials to your blueprint specifications.

Magnetizing and Handling

SmCo magnets require extremely high magnetizing fields and special consideration must be given to this when designing complex assemblies, if it is intended to magnetize after assembly. Consult us if you foresee any problems.
SmCo magnets are mechanically very weak, and magnetically very strong. They must therefore be handled very carefully to avoid damage and injury to personnel handling the magnets. Receiving and assembly personnel should be warned about the dangers of handling magnetized SmCo magnets.

Temperature Effects

SmCo magnets can operate at temperatures up to 350 C, depending upon the grade and permeance coefficient. Sm2Co17 materials exhibit superior temperature characteristics as compared to the Sm1Co5 types.


Magnetic properties of SmCo5 (Sintered SmCo Magnet)
Material Grade Remanence Coercive Force Intrinsic Coercive Force Max.

energy product

Curie
Temperature
Max.
Operating
Temperature
Temperature
Coefficient
of Br
Temperature
Coefficient
of Hc
Br Hcb Hcj (BH)max Tc Tw
SmCo5
(Smpr)co
5
T KGs KA/m KOe KA/m KOe KJ/m3 MGoe °C °C C %C
YX-
16
0.81-0.85 8.1-
8.5
620-660 7.8-
8.3
1194-1830 15-23 110-127 14-16 750°C 250°C -0.05 -0.3
YX-
18
0.85-0.9 8.5-
9.0
660-700 8.3-
8.8
1194-1830 15-23 127-143 16-18 750°C 250°C -0.05 -0.3
YX-
20
0.9-0.94 9.0-
9.4
680-725 8.5-9.1 1194-1830 15-23 150-167 19-21 750°C 250°C -0.05 -0.3
YX-
22
0.92-0.96 9.2-
9.6
710-750 8.9-9.4 1194-1830 15-23 160-175 20-22 750°C 250°C -0.05 -0.3
YX-
24
0.96-1.0 9.6-
10.0
730-770 9.2-9.7 1194-1830 15-23 175-190 22-24 750°C 250°C -0.05 -0.3
SmCo5 YX-
20s
0.9-0.94 9.0-
9.4
680-725 8.5-9.1 1433-1830 18-23 143-160 18-20 750°C 250°C -0.05 -0.3
YX-
22s
0.92-0.96 9.2-
9.6
710-750 8.9-9.4 1433-1830 18-23 160-175 20-22 750°C 250°C -0.05 -0.3
Low
temperature coefficient
SmCo5 (SmGd)Co
5
LTc
(YX-
10)
0.59-0.63 5.9-
6.3
460-493 5.8-6.2 1430-1830 18-23 68-80 8.5-10 700°C 250°C Temperature Temperature
Coefficient
of Br %°C
20-100°C -0.004
100-200°C -0.021
200-300°C -0.042
ce(coFecu)5 YX-
12
0.70-0.74 7.0-
7.4
358-390 4.5-4.9 358-478 4.5-6 80-103 10-13 450°C 200°C

Magnetic properties of Sm2Co17 (Sintered SmCo Magnet)

Material Grade Remanence Coercive Force Intrinsic Coercive Force Max.

energy product

Curie
Temperature
Max.
Operating
Temperature
Temperature
Coefficient
of Br
Temperature
Coefficient
of Hc
Br Hcb Hcj (BH)max Tc Tw
Sm2Co17
Sm2
(CoFecuzr)17
YXG-
24H
0.95-1.02 9.5-
10.2
700-750 8.7-9.4 =1990 =25 175-191 22-24 800°C 350°C -0.03 -0.2
YXG-
26H
1.02-1.05 10.2-
10.5
750-780 9.4-9.8 =1990 =25 191-207 24-26 800°C 350°C -0.03 -0.2
YXG-
28H
1.03-1.08 10.3-
10.8
756-796 9.5-10 =1990 =25 207-220 26-28 800°C 350°C -0.03 -0.2
YXG-
30H
1.08-1.10 10.8-
11.0
788-835 9.9-10.5 =1990 =25 220-240 28-30 800°C 350°C -0.03 -0.2
YXG-
24
0.95-1.02 9.5-
10.2
700-750 8.7-9.4 =1433 =18 175-191 22-24 800°C 300°C -0.03 -0.2
YXG-
26
1.02-1.05 10.2-
10.5
750-780 9.4-9.8 =1433 =18 191-207 24-26 800°C 300°C -0.03 -0.2
YXG-
28
1.03-1.08 10.3-
10.8
756-796 9.5-10 =1433 =18 207-220 26-28 800°C 300°C -0.03 -0.2
YXG-
30
1.08-1.10 10.8-
11.0
788-835 9.9-10.5 =1433 =18 220-240 28-30 800°C 300°C -0.03 -0.2
YXG-
26M
1.02-1.05 10.2-
10.5
750-780 9.4-9.8 955-1273 12-16 191-207 24-26 800°C 300°C -0.03 -0.2
YXG-
28M
1.03-1.08 10.3-
10.8
756-796 9.5-10.0 955-1273 12-16 207-220 26-28 800°C 300°C -0.03 -0.2
YXG-
30M
1.08-1.10 10.8-
11.0
788-835 9.9-10.5 955-1273 12-16 220-240 28-30 800°C 300°C -0.03 -0.2
YXG-
28L
1.02-1.08 10.2-
10.8
398-445 5.0-5.6 400-520 5.2-6.5 207-220 26-28 800°C 250°C -0.03 -0.2
YXG-
30L
1.08-1.15 10.8-
11.5
398-445 5.0-5.6 400-520 5.2-6.5 220-240 28-30 800°C 250°C -0.03 -0.2
Low
temperature coefficient Sm2Co17 (SmEr)2
(CoTM)17
LTC
(YXG-
22)
0.94-0.98 9.4-
9.8
668-715 8.4-9.0 1194-1591 15-20 167-183 21-23 840°C 300°C Temperature Temperature
Coefficient
of Br %°C
-50-25°C +0.005
20-100°C +0.012
100-200°C +0.006
200-300°C -0.025
Characteristic comparisons of permanent magnetic materials:
,
Materials
(BH)max
Hcj
Br Tc
(Working temperature)max
Anti-causticity
SmCo1:5
16-25
15-25
-0.05
200-250°C
Good
SmCo2:17
22-30
6-30
-0.03
300-350°C
Good
NdFeB
26-52
12-30
-0.11
80-200°C
Bad
Ferrite magnet
3-4.5
3-4.5
-0.19
200-300°C
Good
AINiCo
5-10
1-1.8
-0.03
450-500°C
Excellent
Copyright © 2012 Evermag Magnets Ltd. All Right Resverd. TEL:+86-574-87435893 FAX:+86-574-56877596 E-MAIL: info@evermagnets.com