Molybdenum Fasteners

Molybdenum Screws, Nuts & Washers

What are molybdenum fasteners?

Molybdenum fasteners are produced from a silvery-white metal typically supplied at 99.95% purity or higher. Molybdenum is recovered as a by-product of copper and tungsten mining and is widely used where dimensional stability and strength must be maintained at high temperatures.

Molybdenum has an extremely high melting point of approximately 2620°C, one of the highest of all pure elements, allowing fasteners to retain strength without significant expansion or deformation.

How do molybdenum fasteners perform at high temperatures?

Molybdenum screws and fasteners maintain mechanical strength at elevated temperatures and perform well in oxygen-free environments such as vacuum furnaces and sputtering equipment. Weak oxidation begins at around 300°C, with increased oxidation occurring at temperatures above 600°C, which should be considered during material selection.

Are molybdenum fasteners used in alloys?

Molybdenum is frequently used in alloy compositions to enhance performance. A common example is TZM (Titanium-Zirconium-Molybdenum), which offers improved tensile strength and creep resistance compared to commercially pure molybdenum.

Molybdenum screws and fasteners are available from stock or to order. Non-standard sizes, grades and finishes are available as specials, and bespoke components can be manufactured to drawings and specifications, subject to minimum order quantities.