The regular power graphite electrode is made from petroleum coke with a little pitch, which meets the state standards YB/T4088-2000
The high power graphite electrode is made form 70% petroleum coke and 30% imported needle coke, which meets the state standards YB/T4089-2000
The ultra high power graphite electrode is made form 100% imported needle coke, which meets the state standards YB/T 4090-200
Note: Needle coke is one kinds of very important material to produce the high grade graphite electrode, which is rapid development in carbon graphite industry. The needle coke own the following characteristics: low electric resistance, low dilatation coefficient, good electric and thermal conductivity, high oxidation resistance, greater resistance to thermal and mechanical shock, high mechanical strength, high machining accuracy, low consume.