About 70% of molybdenum’s applications are in alloys. Molybdenum is used in high-strength alloys and in high-temperature steels. In certain nickel-based alloys, such as Hastelloys, are notably heat-resistant and corrosion-resistant.
Molybdenum oxidizes at elevated temperature. Molybdenum is used in oil pipelines, in parts of aircraft and missile, and in filaments. Molybdenum is used as electrodes for heated glass furnaces and forehearths.
Molybdenum is essential as a catalyst in refining of petroleum, especially for removing organic sulfurs from petroleum products. Molybdenum sulfide is a valuable lubricant, especially at high temperatures where regular oils would decompose.