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Many buyers encounter early failure such as cavity wear, corner chipping, cracking and oxidation, which are mostly caused by wrong graphite grade selection, poor machining accuracy or insufficient post-treatment. Before placing orders, you need to confirm four key indicators: graphite purity, bulk density, average grain size and machining tolerance.
Fine-grain, high-density graphite brings better wear resistance and dimensional stability, suitable for precision molds and EDM electrodes. Medium-grain graphite with good thermal shock resistance is more cost-effective for large thermal field components. If the parts work in air environment at high temperature, anti-oxidation coating is necessary to extend service life. Impregnation treatment can reduce porosity and improve resistance to molten metal penetration.
Besides material specs, reliable machining control matters. Sharp inner corners, thin wall sections and thread structures require stable CNC processing to prevent hidden cracks. Jiecheng Graphite provides material test reports and dimension inspection records for every batch. We communicate with engineers at the drawing stage to optimize structure, reduce stress concentration and help customers cut downtime and replacement cost.
