Molybdenum metal is used in:
• Alloying agent – contributing hardenability, toughness to quenched/tempered steels. It also improves the strength of steels at high temperatures (red-hardness).
• In nickel-based alloys (such as Hastelloys®) and stainless steels it imparts heat-resistance and corrosion-resistance to chemical solutions.
• Electrodes for electrically heated glass furnaces and forehearths.
• Nuclear energy applications, as missile and aircraft parts (where high temperature resistance is vital).
• As a catalyst in the refining of petroleum.
• As a filament material in electronic/electrical applications.
• As a support members in radio and light bulbs.
• Arc resistant electric contacts.
• Thermocouple sheaths
• Flame- and corrosion-resistant coatings for other metals (generally arc deposited for metallising).
Molybdenum and its compounds are used in:
• Molybdenum sulphide and selenites are used as a high temperature lubricant in favour to petroleum based oils, due to its superior high temperature resistance.
• Sodium molybdate (Na2MoO4) in the anhydrous form is used as a dry powdered fertiliser.
• Calcium molybdate (CaMoO4), Molyte, molybdic oxide, molybdenum-chromium are used as sources of molybdenum for steels.