SmCo

Materials from LIHE include both Rare-Earth Magnets and Non- Rare-earth Magnets. Rare-Earth Magnets are of higher performance while Non- Rare-Earth Magnets are of cheaper price. LIHE always tries to provide its customers appropriate materials according to their actual requirements.

As previously stated, Rare-Earth Magnets are of higher performance than Non-Rare-Earth Magnets.

Nd-Fe-B magnets (both Sintered and Bonded) and Sm-Co magnets (Sintered) are the major Rare-Earth magnetic materials of LIHE.

Although these two magnets can be substituted by each other where operating temperature is less than 80。C, there still exits some feature differences. The price of Nd-Fe-B magnets is relatively lower. The (BH) max of Nd-Fe-B magnets can reach to 48MGOe, which is higher than that of Sm-Co magnets. However, Sm-Co magnets have special advantages also. Besides its better corrosion & oxidation resistance, Sm-Co magnets have better temperature stability. Sm-Co magnets can be operated at higher temperature up to 300。C, while Nd-Fe-B magnets can not stand temperature over 180。C.

Specifications for SmCo

参数 Characteristics 材料 牌号 Material Grade 剩磁 Residual Fulx Br 矫顽力 Coercive Force Hcb 内禀矫顽力 Intrinsic Coercive Force Hcj 最大磁能积 Max. Energy Product (BH)max 居里温度 Curie Temp Tc 密度 Density ρ 剩磁温度数 Temp. Coefficient △Bd/Bd 热膨胀系数 Thermal Expansion coefficient 韦氏硬度 Vickers Hardness   Tesal (kGs) KA/m (kOe) KA/m (kOe) kJ/m3 (MGOe) (℃) g/cm3 (％℃) C⊥ (1℃) C∥ (1℃) Hv 1:5 SmCo5 SM~18 0.80~0.90 (8.0~9.0) 621~700 (7.8~8.8) ≥1990 (≥25.0) 127~159 (16.0~20.0) 750~800 8.2~8.4 -0.05 13×10-6 6×10-6 450~500 SM~20 0.90~0.95 (9.0~9.5) 676~740 (8.5~9.3) ≥1432 (≥18.0) 151~167 (19~21) 750~800 8.2~8.4 -0.05 13×10-6 6×10-6 450~500 SM~22 0.95~1.00 (9.5~10.0) 716~756 (9.0~9.5) ≥1194 (≥15.0) 167~183 (21~23) 750~800 8.2~8.4 -0.05 13×10-6 6×10-6 450~500 2:17 Sm2 (Co,Cu,Fe,Zr) 17 SM~18T 0.85~0.95 (8.5~9.5) 636~716 (8.0~9.0) ≥1592 (≥20.0) 127~159 (16.0~20.0) 850~900 8.3~8.5 -0.01 11×10-6 8×10-6 500~600 SM~22T 0.95~1.00 (9.5~10.0) 676~756 (8.5~9.5) ≥1592 (≥20.0) 159~191 (20.0~24.0) 850~900 8.3~8.5 -0.01 11×10-6 8×10-6 500~600 SM~22L 0.95~1.00 (9.5~10.0) 477~557 (6.0~7.0) 493~716 (6.2~9.0) 159~191 (20.0~24.0) 800~850 8.3~8.5 -0.03 11×10-6 8×10-6 500~600 SM~22H 0.95~1.00 (9.5~10.0) 557~756 (7.0~9.5) ≥637 (≥8.0) 159~191 (20.0~24.0) 800~850 8.3~8.5 -0.03 11×10-6 8×10-6 500~600 SM~22U 0.95~1.00 (9.5~10.0) 716~796 (9.0~10.0) ≥1990 (≥25.0) 159~191 (20.0~24.0) 800~850 8.3~8.5 -0.03 11×10-6 8×10-6 500~600 SM~26L 1.00~1.08 (10.0~10.8) 477~557 (6.0~7.0) 493~716 (6.2~9.0) 191~223 (24.0~28.0) 800~850 8.3~8.5 -0.03 11×10-6 8×10-6 500~600 SM~26H 1.00~1.08 (10.0~10.8) 557~812 (7.0~10.2) ≥637 (≥8.0) 191~223 (24.0~28.0) 800~850 8.3~8.5 -0.03 11×10-6 8×10-6 500~600 SM~26U 1.00~1.08 (10.0~10.8) 756~836 (9.5~10.5) ≥1990 (≥25.0) 191~223 (24.0~28.0) 800~850 8.3~8.5 -0.03 11×10-6 8×10-6 500~600 SM~30L 1.08~1.12 (10.8~11.2) 477~557 (6.0~7.0) 493~716 (6.2~9.0) 223~247 (28.0~31.0) 800~850 8.3~8.5 -0.03 11×10-6 8×10-6 500~600 SM~30H 1.08~1.12 (10.8~11.2) 637~836 (8.0~10.5) ≥637 (≥8.0) 223~247 (28.0~31.0) 800~850 8.3~8.5 -0.03 11×10-6 8×10-6 500~600 SM~30U 1.08~1.12 (10.8~11.2) 796~859 (10.0~10.8) ≥1990 (≥25.0) 223~247 (28.0~31.0) 800~850 8.3~8.5 -0.03 11×10-6 8×10-6 500~600 SM~32 ≥1.12 (≥11.2) ≥557 (≥7.0) ≥637 (≥8.0) ≥239 (≥30.0) 800~850 8.3~8.5 -0.03 11×10-6 8×10-6 500~600