High purity graphite possesses many good characteristics such as high strength,excellent thermal shock resistance,good resistance to high temperature and oxidation,low specific electric resistance,good anticorrosion and ease of precise machining.It also has a property of low impurities. Ash(PPM),max0.1 Specific Electrical Eesistance,max 10 Bulk Density( g/cm3),min1.85 Compression Strength(Mpa),min70 Flexural strength (Mpa),min35