How to judge the quality of high purity graphite electrodes

As an indispensable material in electric arc furnace steelmaking and other high-temperature industries, the quality of high-purity graphite electrodes directly affects the equipment’s production efficiency, energy consumption, and product quality. When purchasing graphite electrodes, how to judge their quality has become the focus of many companies. This article will start from several key factors and introduce methods to judge the quality of graphite electrodes to help you choose the right product.

Several aspects of judging the quality of high-purity graphite electrodes

1. Purity: The purity of graphite electrodes has a great influence on their performance. High-purity graphite electrode has lower resistivity and higher oxidation resistance. Generally, the purity of graphite electrodes is required to be above 99%.
2. Resistivity: Resistivity is an important indicator for measuring the conductivity of graphite electrodes. The lower the resistivity, the better the conductivity. Generally, the resistivity of graphite electrode is required to be below 10-60·m.
3. Antioxidation: Graphite electrodes easily react with oxygen at high temperatures, so the oxidation resistance greatly influences their service life. High-quality graphite electrodes should have good oxidation resistance.

1. Hardness and wear resistance: Graphite electrode needs to withstand certain mechanical wear during use, so hardness and wear resistance also have a great influence on their service life.
   High-quality graphite electrodes should have suitable hardness and good resistance.
2. Shape and size accuracy: The shape and size accuracy of graphite electrodes have a great influence on their application in electric spark machining. High-quality graphite electrodes should have high shape and size accuracy to ensure the machining effect.
3. Water content: The water content in the graphite electrode will affect its performance and service life. High-quality graphite electrodes should minimize the water content, generally required to be below 0.5%.
4. Particle size: The particle size of the graphite electrode has a certain impact on its performance. The smaller the particle size, the better the surface quality of the graphite electrode and the better the conductivity.