Product details:

Special properties of graphite
Graphite has the following special properties due to its special structure:
1) High temperature resistance: the melting point of graphite is 3850 ± 50 ℃, and the boiling point is 4250 ℃. Even if it is burned by ultra-high temperature arc, the weight loss is very small, and the coefficient of thermal expansion is also very small. The strength of graphite increases with the increase of temperature. At 2000 ℃, the strength of graphite is doubled. EDM graphite material
2) Conductivity and thermal conductivity: the conductivity of graphite is 100 times higher than that of general non-metallic minerals. Its thermal conductivity exceeds that of metal materials such as steel, iron and lead. The thermal conductivity decreases with the increase of temperature, and even at extremely high temperatures, graphite becomes an insulator. Graphite can conduct electricity because each carbon atom in graphite forms only three covalent bonds with other carbon atoms, and each carbon atom still retains one free electron to transfer charges. 3) Lubricity: the lubricity of graphite depends on the size of graphite scales. The larger the scales, the smaller the friction coefficient, and the better the lubricity. 　　
4) Chemical stability: graphite has good chemical stability at normal temperature, and can resist acid, alkali and organic solvent corrosion. 　　
5) Plasticity: graphite has good toughness and can be rolled into very thin flakes. Dongguan graphite factory
6) Thermal shock resistance: when graphite is used at normal temperature, it can withstand drastic changes in temperature without damage. When the temperature changes abruptly, the volume of graphite changes little and cracks will not occur.

Characteristics of graphite:
1. Light weight: the specific gravity is 1 / 5 of copper, suitable for making large electrodes
2. Good machining performance: cutting resistance is 1 / 3 of copper
3. Easy surface treatment: no burr after machining, easy to handle by hand
4. High temperature resistance: when the temperature reaches 3650 ℃, sublimation gasification can withstand greater current
5. Low thermal expansion coefficient: 1 / 4 of copper, and EDM graphite material is not deformed when heated
6. High speed of electrical discharge machining: the speed of electrical discharge machining is 3-5 times higher than that of copper block, which is more obvious in large area or rough machining.
7. Small electrode loss: the ratio with copper is 2:4, which can be processed non destructively.

Main purpose
1. As refractory material: graphite and its products have the properties of high temperature resistance and high strength. They are mainly used to make graphite crucibles in the metallurgical industry. In steel-making, graphite is often used as a protective agent for steel ingots and as the lining of metallurgical furnaces. 　
2. As a conductive material: used in the electrical industry to manufacture electrodes, brushes, carbon rods, carbon tubes, positive electrodes of mercury positive current devices, graphite gaskets, telephone parts, coatings of TV picture tubes, etc. 　　
3. As wear-resistant lubricating material: graphite is often used as a lubricant in the machinery industry. Lubricating oil can not be used at high speed, high temperature and high pressure, while graphite wear-resistant materials can work without lubricating oil at a very high sliding speed at a temperature of 200 ~ 2000 ℃. Many equipment conveying corrosive media widely use graphite materials to make piston cups, sealing rings and bearings, which do not need to add lubricating oil during operation. Graphite emulsion is also a good lubricant for many metal processing (wire drawing and pipe drawing). 　　
4. Graphite has good chemical stability. Specially processed graphite, which has the characteristics of corrosion resistance, good thermal conductivity and low permeability, is widely used to make heat exchangers, reaction tanks, condensers, combustion towers, absorption towers, coolers, heaters, filters and pumps. It is widely used in petrochemical industry, hydrometallurgy, acid-base production, synthetic fiber, paper making and other industrial sectors, which can save a lot of metal materials. 　　
5. As casting, foundry, die casting and high-temperature metallurgical materials: because graphite has a small coefficient of thermal expansion and can withstand rapid cooling and heating changes, it can be used as a mold for glassware. After graphite is used, ferrous metal castings have accurate dimensions, smooth surface and high yield. It can be used without processing or a little processing, thus saving a lot of metal. In the production of cemented carbide and other powder metallurgy processes, graphite materials are usually used to make dies and ceramic boats for sintering. Single crystal silicon crystal growth crucibles, regional refining vessels, support fixtures, induction heaters, etc. are all made of high-purity graphite. In addition, graphite can also be used as graphite insulation board and base for vacuum smelting, furnace tube, rod, plate, lattice and other components of high-temperature resistance furnace. 　　
6. Used in the atomic energy industry and national defense industry: graphite has a good neutron moderator for use in atomic reactors. Uranium graphite reactor is one of the most widely used atomic reactors at present. As the deceleration material in the nuclear reactor for power, it should have high melting point, stability and corrosion resistance. Graphite can fully meet the above requirements. The purity of graphite used for atomic reactors is very high, and the impurity content should not exceed tens of ppm. In particular, the boron content should be less than 0.5ppm. In the national defense industry, graphite is also used to make nozzles of solid fuel rockets, nose cones of missiles, parts of aerospace equipment, heat insulation materials and radiation protection materials. EDM graphite material
7. Graphite can also prevent boiler scaling. Tests by relevant units show that adding a certain amount of graphite powder to water (about 4-5g per ton of water) can prevent boiler surface scaling. In addition, graphite can be coated on metal chimneys, roofs, bridges and pipes to prevent corrosion and rust. 　　
8. Graphite can be used as pencil lead, pigment and polishing agent. After special processing, graphite can be made into various special materials for use in relevant industrial departments. 　　
9. Electrode: why can graphite replace copper as electrode.

Dongguan Jiecheng graphite products Co., Ltd. specializes in the development, cooperative production, sales and special-shaped processing of carbon materials, and has its own production base outside the province. The special graphite, ordinary carbon blocks and graphite electrodes operated by Dongguan Yongyao graphite are of high quality and fair price, and are applicable to all fields. Special graphite for mould has its own unique features and has been widely used in relevant industries. The continuous development of Dongguan Yongyao graphite is inseparable from the support and care of our customers. Therefore, it is our sole purpose to provide customers with high-quality and economical products and thoughtful and satisfactory services. We sincerely welcome friends from all walks of life to patronize and cooperate with us.

Main industry: graphite and carbon products.
Main products or services: graphite for mold; Imported graphite; Domestic graphite; Special graphite; Fine structure graphite; Graphite electrode material; Die EDM graphite and products.
The largest domestic EDM graphite supplier in China, France Roland graphite, Japan Toyo graphite
Special recommendation: isostatic pressing graphite