RP Graphite Electrodes With Nipple For Melting Steel

Graphite Electrode   Artificial graphite electrode is made of high-quality low ash materials, such as petroleum coke, needle coke and coal pitch.after calcining,burdening,kneading,forming,baking and pressure impregnation, graphitization and then precision machined with professional CNC of the products own characteristics with low resistivity, good electrical conductivity ,low ash, compact structure,good anti oxidation and high mechanical strength, so it is the best conductive material for electric arc furnace and smelting furnace.  Graphite electrode size detail:                                         RP / HP / SHP / UHP Graphite electrode                                                   Standard sizes of electrode     Specification ( Inch )     Allow Diamater (mm)           Allowable Length (mm ) Nominal Diamater    Max     Min Nominal Length    Max      Min  6     150    154   151   1600   1700   1500   1800   1875   1700  8     200    205   200   1600   1700   1500   1800   1875   1700  9    225    230   225   1600    1700   1500   1800    1875   1700  10    250   256   251   1600    1700   1500   1800    1875   1700  12    300   307   302   1800    1875   1700 14    350   357   352    1600    1700   1500    1800    1875   1700 16    400   409   403   1600   1500   1500   1800   1875   1700   2100   2175   1975   18    450   460   454   1800   1875   1700   2100   2175   1975   2400   2475   2275  20    500   511   505   1800   1875   1700   2100   2175   1975   2400   2475   2275  22    550   562   556   2100   2175   1975   2400   2475   2275  24    600   613   607   2100   2175   1975   2400   2475   2275   2800   2850   2550 28    700   714   708   2400   2475   2275   2800   2850   2550 Physical and chemical index Item RP HP UHP Φ200- 300 Φ350- 600 Φ700 Φ200-400 Φ550-700 Φ700 Φ200-400 Φ450-600 Φ700 Resistivity μΩM  (Max) Electrode 7.5 8.0 6.5 7.0 5.5 5.5 Nipple 6.0 6.5 5.0 5.5 3.8 3.6 Bulk density g/cm³ Electrode 1.53 1.52 1.53 1.62 1.60 1.62 1.67 1.66 1.66 Nipple 1.69 1.68 1.73 1.72 1.75 1.78 Bending strength Mpa Electrode 8.5 7.0 6.5 10.5 9.8 10 11 11 Nipple 15.0 16.0 20.0 Elastic modulus  Gpa Electrode 9.3 9.0 12.0 12.0 14.0 14.0 Nipple 14.0 16.0 18.0 22.0 Ash,       %     (Max) Electrode 0.5 0.3 0.3 Nipple CTE (100-600ºC) *10-6/ºC Electrode 2.9 2.4 1.5 1.4 Nipple 2.8 2.2 1.40 1.2 Recommended current carrying capacity Nominal diameter(mm) RP HP UHP Current carrying capacity Current density Current carrying capacity Current density Current carrying capacity Current density in mm A A/cm2 A A/cm2 A A/cm2 12 300 10000-13000 14-18 13000-17400 17-24 15000-22000 20-30 14 350 13500-18000 14-18 17400-24000 17-24 20000-30000 20-30 16 400 18000-23500 14-18 21000-31000 16-24 25000-40000 19-30 18 450 22000-27000 13-17 25000-40000 15-24 32000-45000 19-27 20 500 25000-32000 13-16 30000-48000 15-24 38000-55000 18-27 22 550 28000-34000 12-14 34000-53000 14-22 45000-65000 18-27 24 600 30000-36000 11-13 38000-58000 13-21 50000-75000 18-26 28 700 34000-42000 9-11 45000-72000 12-19 70000-120000 18-25