The thermal expansion coefficient of molybdenum alloy is related to the specific alloy composition, and different alloy compositions have different thermal expansion coefficients. In general, molybdenum alloys have a lower coefficient of thermal expansion than steel but a higher coefficient of thermal expansion than aluminum. Taking Mo-30W alloy as an example, its thermal expansion coefficient is about 5.3×10^-6/℃. The thermal expansion coefficient of Mo-5Re alloy is about 6.2×10^-6/℃.
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