Graphitelektroden (UHP)

Ultra-high-power (UHP) graphite electrodes are needle-coke-based conductors that carry the high secondary current into electric arc and ladle furnaces, sustaining the arc that melts steel scrap. The graphitized needle-coke matrix gives low electrical resistivity (≤ 5.8 µΩ·m) and high bulk density (≥ 1.68 g/cm³), so the column runs cooler at high amperage, oxidizes more slowly, and resists thermal shock during charge cycling. Lower resistivity means less I²R loss and lower specific electrode consumption per tonne of liquid steel. Primary use is EAF steelmaking and ladle furnace (LF) refining, plus submerged-arc furnaces and foundry melting. Diameters span 300-700 mm to match transformer rating and current density. The UHP grade is specified where high current density, ash ≤ 0.3%, and flexural strength ≥ 10 MPa are needed to limit breakage and tip spalling under arc instability; HP suits lighter duty. Each shipment ships with COA and MTC. Multi-regional sourcing supports CIF Marmara delivery and Gebze bonded stock, 20 MT FCL. Send diameter, grade, and nipple connection for a firm RFQ.

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