1.high hardness, small coefficient of expansion, brittle property and good thermal conductivity 2.ISO9001:2008 ... Celsius or above, featured by high hardness, small coefficient of expansion, brittle property and good thermal conductivity, widely used as ... .01.5Note: Silicon carbide sand and powder for deoxidization of steelmaking in specification of 50, 60, 70, 80 and 90 can be ...