Tungsten, molybdenum and its alloy materials have strong high temperature resistance, low expansion rate, good electrical conductivity, high thermal conductivity, are widely used in metallurgy, chemical industry, electronics, light source, high temperature machining, medicine, photoelectric materials and many other application fields, tungsten, molybdenum and its alloy materials of Gemme metal can perform excellent performance in various application fields. For many customers to improve production efficiency, reduce production costs.