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No one gas can melt it in Air (℉): Acetylene 4690 / MAPP 3750 / Propane 3730 / Butane 3580 / Methane 3550 Melting point °F : Molybdenum 4753 °F / Stainless Steel 2642 °F / Palladium 2826°F Thermal conductivity W/(m·K) :Molybdenum 138 / Stainless Steel 80 / Palladium 72 It has a melting point of 2,623 °C (4,753 °F); of the naturally occurring elements, only tantalum, osmium, rhenium, tungsten, and carbon have higher melting points,It has one of the lowest coefficients of thermal expansion among commercially used metals. Biological role Acute toxicity has not been seen in humans, and the toxicity depends strongly on the chemical state. Studies on rats show a median lethal dose (LD50) as low as 180 mg/kg for some Mo compounds. Applications Molybdenum can withstand extreme temperatures without significantly expanding or softening, making it useful in environments of intense heat, including military armor, aircraft parts, electrical contacts, industrial motors, and filaments