... of refractory metal parts. Tungsten has the highest melting point of all metals as well as a remarkably ... with excellent thermal properties and is still easy to machine. So , tungsten, molybdenum and their alloy is ... 3.Main applications:sapphire single crystal growth furnace, metallurgical industry furnace, vacuum furnace, high temperature furnace, silicon industry furnace, quartz glass, metal extracting, , ...