graphite electrodes: Grade: RP (ISO9 001:2000 STANDARD) Diameter: 250mm- 600 mm Length: 1800mm (+,-100mm) Nipples: 4TPI,3TPI Specification of RP graphite electrodes: UnitNominal Diameter(mm)250-400450-600Specific Resistance (not over)Electrode NippleμΩ.m8.55.09.05.8Bending Strength (not below)Electrode NippleMpa7.8 13.07.8 13.0Elastic Modulus (not over)Electrode NippleGpa9.3 14.09.3 14.0Bulk ...