Hongsheng cheap graphite products Customized jewelry tools gold melting graphite crucible melting silver crucible
Graphite crucible has the characteristics of high temperature resistance, strong thermal conductivity, good corrosion resistance and long service life. In the process of high temperature use, the coefficient of thermal expansion is small, and it has a certain strain resistance to rapid cooling and rapid heating. Strong corrosion resistance to acid and alkaline solution, excellent chemical stability, in the melting process does not participate in any chemical reaction. Graphite crucible has impurities (ash) of less than 1% and is used for refining high purity metals, as well as high purity graphite which has been specially purified (ash <20ppm). The inner wall of the graphite crucible is smooth, and the molten metal liquid is not easy to leak and adhere to the inner wall of the crucible, so that the metal liquid has good fluidity and casting property, and is suitable for various molds casting and forming. Graphite crucible has been widely used in the smelting of alloy tool steel and non-ferrous metals and their alloys due to its excellent properties.