... low S low N carburizing materials for foundry stable quality and resonable price high quality carbon for iron castingstable qualityused as carburizer for ... -5mm,5-10mm,5-15,ect.GPC is also called artificial graphite scraps, characterized by high carbon, low sulphur, low nitrogen, ... furnace. The finished steel and iron have a better quality by using GPC.If any interest or questions, please feel free to ...