Advantages of Molybdenum Bolts in Extreme Temperature Applications

Molybdenum Bolts

In extreme temperature applications, it’s imperative to use bolts that can withstand the harsh environmental conditions. Stainless steel bolts have been a common choice for most industries, but in recent times, molybdenum bolts have gained popularity due to their superior properties. Molybdenum is a hard, silvery-white metal with a high melting point, making it ideal for use in high-temperature applications. In this blog post, we’ll explore the advantages of molybdenum bolts in extreme temperature applications.

What is Molybdenum Bolts?

Molybdenum bolts are high-strength bolts made from a molybdenum alloy typically containing 65-70% molybdenum and the remaining balance of elements being chromium, manganese, silicon and iron. They are commonly used for fastening applications in extreme conditions where high levels of corrosion resistance and tensile strength over an extensive temperature range are required. The superior properties of these bolts can be attributed to their excellent creep-rupture properties at higher temperatures with very low moisture absorbency. Molybdenum bolts have a unique low-friction surface finish, making them suitable for bearing applications where less wear is essential. These fastener bolts also provide electrical conductivity, which helps improve the running life, making it ideal in electrical assemblies or electronic components that require power connection points. Additionally, they offer exceptional abrasion resistance and are lightweight yet extremely strong despite their reduced wall thicknesses.

Advantages of Molybdenum Bolts in Extreme Temperature Applications

High Melting Point of Molybdenum Bolts

Molybdenum has one of the highest melting points of all the elements on the periodic table. This makes it an ideal material for extreme temperature applications, as it can withstand temperatures up to 4,473 degrees Fahrenheit (2,623 degrees Celsius).

High-Temperature Resistance

Molybdenum has a high melting point of 2,623°C, making it ideal for high-temperature applications. On the other hand, stainless steel bolts have a maximum operating temperature of around 870°C. Molybdenum can withstand extremely high temperatures without losing its strength, durability, and other physical properties.

Corrosion Resistance of Molybdenum Bolts

Molybdenum is highly resistant to corrosion and oxidation, making it suitable for harsh environments. Extreme temperatures can cause corrosion on metals, leading to weaker mechanical properties and shorter lifespan. Molybdenum bolts remain stable in harsh environments, making them ideal for applications where corrosion could be a problem.

Strength and Durability

Molybdenum has a high strength-to-weight ratio, which means it can withstand extreme pressures or forces without bending, breaking, or deforming. The material’s hardness and toughness make it highly durable, making it an excellent option for applications that require long-lasting and sturdy bolts.

Non-Magnetic and Non-Toxic

Unlike stainless steel, molybdenum is non-magnetic and non-toxic. This makes it suitable for use in applications where magnetic fields could cause problems or where toxic materials are prohibited. Additionally, molybdenum is safe for use in medical, aerospace, and other critical applications.

Easy to Produce.

Another advantage of molybdenum is that they are relatively easy to produce. The metal can be easily extruded into the desired shape and then machined to the precise specifications required for the application.

Long lifespan.

Molybdenum bolts also have a long lifespan and are not susceptible to corrosion or wear and tear. This makes them ideal for applications where reliability and durability are critical, such as aerospace.


Molybdenum is a relatively affordable material compared to other metals commonly used for high-temperature applications, such as titanium and Inconel. It’s easy to machine, making it a cost-effective option that doesn’t compromise on quality or performance.


Molybdenum bolts have several advantages over stainless steel bolts in extreme temperature applications. They offer high-temperature resistance, corrosion resistance, strength, durability, non-magnetism, non-toxicity, and affordability. As industries seek to improve the performance and durability of their products in harsh environments, molybdenum could be the go-to option. Whether in the aerospace, automotive, or chemical processing industries, molybdenum bolts can provide a reliable and efficient solution for extreme temperature applications.

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