Incoloy Bolt

An Incoloy bolt is a fastener made from a nickel-iron-chromium alloy that resists corrosion and oxidation at high temperatures. It is used where stainless steel would not last.

An Incoloy bolt suits joints that face heat, corrosion or both. It takes a nut of a matching alloy and thread. A torque wrench sets it to the tension the joint needs.

Incoloy bolts are often made in Incoloy 925 or UNS N09925, a precipitation hardening alloy. This material gives high strength and good corrosion resistance in sour gas and marine environments.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a mill test certificate that confirms the alloy grade and heat number. On receipt, check the head marking, the thread condition and the surface for any signs of corrosion or damage. Also check that the dimensions match your order.