Samarium Cobalt SmCo5 / SM2Co17
Introduction
Samarium Cobalt magnets, also called SmCo magnets, have two alloy varieties — SmCo5 and Sm2Co17—which offer superior temperature resistance in the range of 250°C to 350°C. With better corrosion resistance than NdFeB magnets, for most applications, an additional coating for protection is not required.
Meanwhile, the (BH)max of SmCo magnets can approximate to 29MGOe which is close to the strength of NdFeB magnets. Based on not only its exceptional resistance to heat and corrosion but also the adequate magnetic energy, SmCo magnets play an important role in both defense and aerospace industries.
Features
• Stable performance in high-temperature environments
• Capable of complex machining for precision applications
• High magnetic energy product, comparable to sintered neodymium iron boron magnets
• Inherent corrosion resistance in the magnet material
• Relatively brittle; can be coated to prevent brittle fracture
• Rare earth material, hence higher cost
工作溫度
0°C～350°C
Applications
• Aerospace and aviation
• Military components
• Medical surgery
• Fluid machinery
• Microwave devices
• Axial seal pumps
• Ignition coils
Samarium Cobalt SmCo5
| Property Grade | Residual Magnetization |
Coercive Force | Intrinsic Coercive Force |
Max. Energy Product |
Operating Temperature |
| Unit | Br (kG) | bHc( KOe) | iHc(KOe) | BHmax. (MGOe) | °C |
| SmCo16 | 8.1-8.5 | 7.8-8.3 | 15-23 | 14-16 | 250 |
| SmCo18 | 8.5-9 | 8.3-8.8 | 15-23 | 16-18 | 250 |
| SmCo20 | 9-9.4 | 8.5-9.1 | 15-23 | 19-21 | 250 |
| SmCo22 | 9.2-9.6 | 8.9-9.4 | 15-23 | 20-22 | 250 |
| SmCo24 | 9.6-10 | 9.2-9.7 | 15-23 | 22-24 | 250 |
Samarium Cobalt SM2Co17
| Property Grade | Residual Magnetization |
Coercive Force | Intrinsic Coercive Force |
Max. Energy Product |
Operating Temperature |
| Unit | Br (kG) | bHc( KOe) | iHc(KOe) | BHmax. (MGOe) | °C |
| SmCo24L | 9.5-10.2 | 7-9 | 8-12 | 22-24 | 250 |
| SmCo26L | 10.2-10.5 | 7-9.4 | 8-12 | 24-26 | 250 |
| SmCo28L | 10.3-10.8 | 7-9.9 | 8-12 | 26-28 | 250 |
| SmCo30L | 10.8-11.5 | 7-10 | 8-12 | 28-30 | 250 |
| SmCo32L | 11-11.5 | 7-10.2 | 8-12 | 29-32 | 250 |
| SmCo26M | 10.2-10.5 | 9-9.8 | 12-16 | 24-26 | 300 |
| SmCo28M | 10.3-10.8 | 9-10 | 12-16 | 26-28 | 300 |
| SmCo30M | 10.8-11 | 9-10.5 | 12-16 | 28-30 | 300 |
| SmCo32M | 11-11.3 | 9-10.6 | 12-16 | 29-32 | 300 |
| SmCo22 | 9.3-9.7 | 8.5-9.3 | >18 | 20-23 | 300 |
| SmCo24 | 9.5-10.2 | 8.7-9.4 | >18 | 22-24 | 300 |
| SmCo26 | 10.2-10.5 | 9.4-9.8 | >19 | 24-26 | 300 |
| SmCo28 | 10.3-10.8 | 9.5-10 | >20 | 26-28 | 300 |
| SmCo30 | 10.8-11 | 9.9-10.5 | >21 | 28-30 | 300 |
| SmCo32 | 11-11.3 | 10.2-10.6 | >15 | 29-32 | 300 |
| SmCo24H | 9.5-10.2 | 8.7-9.4 | >25 | 22-24 | 350 |
| SmCo26H | 10.2-10.5 | 9.4-9.8 | >25 | 24-26 | 350 |
| SmCo28H | 10.3-10.8 | 9.5-10 | >25 | 26-28 | 350 |
| SmCo30H | 10.8-11 | 9.9-10.5 | >25 | 28-30 | 350 |