Ultra-high density & high temperature / strength stability

• High strength at extreme high temperatures (vacuum)
• Radiopaque to x-rays and other radiation
• Very high density of 19.3 gm/cc
• Excellent corrosion resistance
• Mechanical properties of tungsten hex bolts
• Tungsten material datasheet

Tungsten hex bolts are an ideal material for high temperature stability. Their extremely high melting point of 3420°C, makes tungsten bolts useful for some of the hottest vacuum furnace environments. Another attribute of tungsten is its extreme high density. The high mass of tungsten bolts make them radiopaque, allowing them to block radiation and show up well on x-rays – even better than lead. In addition, their high density also makes them ideal for balancing rotating parts. Beyond their high mass and temperature stability, tungsten hex head bolts are also very corrosion resistant.

Tungsten bolts are usually made from tungsten alloys per ASTM B777, and range from 90% to 97% pure tungsten, alloyed with nickel and copper or nickel and iron. Hex head bolts can also be made from Commercially Pure (CP) Tungsten.

Applications

• The heat treating / furnace industry uses tungsten hex bolts in high temperature vacuum furnaces due to tungstens great high temperature strength & stability.
• The oil & gas industry uses tungsten bolts for radiation shielding properties to protect equipment used in oil and gas detection, as well as down hole logging for density and ability to withstand intense hydrostatic pressure
• Tungsten hex bolts also play a role in the medical community for their low magnetic properties as well as their radiopaque properties.
• The aerospace industry depends on the tungsten bolts for their combination of high density and mechanical strength which allows them to reduce the physical size of components, offering greater control of weight distribution for propellers, inertial systems and fluid control systems to name a few.

Resources: Tungsten Torque Specs

Tungsten Bolts:  Shoulder Bolts

Tungsten Hex Head Bolt Features and Benefits

It is important to differentiate between a Incoloy hex head bolt and hex head cap screw. Often people assume they are the same, but they are actually very different fasteners in terms of how they are manufactured, as well as from an application perspectiv. Regardless of your choice, tungsten hex heads offer strong, stable joints because of their large head service. 

The Hex Comparison

Tungsten Chemistry & Specifications

Tungsten Specifications: ASTM B777, Mil Spec T-21014D