300mm Graphite Electrode The reasons why graphite is used as electrode: 1. The processing speed is faster: Generally speaking, the machining speed of graphite is 2-5 times faster than that of copper; while the EDM speed is 2-3 times faster than that of copper; 2. The material is more difficult to deform: it has obvious advantages in the processing of thin bar electrode; the softening point of copper is about 1000 degrees, which is easy to deform due to heat; the sublimation temperature of graphite is 3650 degrees; the coefficient of thermal expansion is only It's 1 / 30 of copper; 3. Lighter weight: the density of graphite is only 1 / 5 of that of copper, which can effectively reduce the burden of machine tool (EDM) when large-scale electrode is EDM; it is more suitable for the application on large-scale mold; 4. The discharge consumption is smaller; because the spark oil also contains C atom, during the discharge processing, the high temperature causes the C atom in the spark oil to be decomposed, and then forms the protective film on the surface of the graphite electrode, which compensates the loss of the graphite electrode. What are the performance indexes of UHP graphite electrode? At present, the diameter of UHP graphite electrode produced in China is 300 mm, 350 mm, 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, 650 Tam and 700 mm. The length of UHP graphite electrode is 1600 mm, 1800 mm, 2000 mm, 2200 mm, 2400 min and 2700 ramp. The quality evaluation of UHP graphite electrode in China (Yb / t4090-2000) limits six physical and chemical indexes, Among them, resistivity, flexural strength, modulus of elasticity, bulk density and linear expansion coefficient are used as quality assessment indexes.300mm Graphite Electrode website:http://www.graphite-electrode-products.com/300mm-graphite-electrode/