Vacuum furnace hot zones are manufactured using materials that can withstand temperatures in the range of 1315ºC (2400ºF) and higher. Of the various types of refractory metals in use, none is more common than molybdenum. The popularity and widespread use of molybdenum in vacuum furnaces is due to the wide range of properties that it exhibits, namely: High melting point, 4748ºF, low vapor pressure, high strength at elevated temperature, low thermal expansion, high thermal conductivity, high elastic modulus, high corrosion resistance, and elevated recrystallization temperature, between 1470º – 2190ºF. Mechanical properties of molybdenum are influenced by purity, type and composition of any alloying elements and by microstructure. Properties such as strength, ductility, creep resistance and machinability are enhanced by additions of alloys such as titanium, zirconium, hafnium, carbon, and potassium along with rare earth element (La, Y, Ce) oxides. https://http://www.vaccumpumpmanufacturer.com/