Smco Other Physical Properties Smco5 Temperature Coefficent Of Br (%/º C): -0.05 Temperature Coefficent Of IHc(%/º C): -0.3 Curie Temperature (º C): 700-750 Density (g/cm³): 8.2-8.4 Vickers Hardness (HV): 450-500 Working Temperature (º C): 250 Sm2co17 Temperature Coefficent Of Br (%/º C): -0.03 Temperature Coefficent Of IHc(%/º C): -0.2 Curie Temperature (º C): 800-850 Density (g/cm³): 8.3-8.5 Vickers Hardness (HV): 500-600 Working Temperature (º C): 350