... -SM Steel Carbon 1-5mm Graphitized Petroleum Coke( Artificial Graphite/synthetic graphite)Index1(1-5mm)2(1-5mm)3(1-5mm)4(1-5mm)5(1-5mm)6(0.2 ... :0-0.2, 0.2-1, 0.3-1, 1-4, 1-5, 1-6, 4-10, 5-10, 1-8, 4-8, etc. ... Electric calcined Carburizer (Artificial Graphite/synthetic graphite)Index9(1-5mm)10(1-5mm ... 0-0.2, 0.2-1, 0.3-1, 1-4, 1-5, 1-6, 4-10, 5-10, 1-8, 4-8, etc. ...