Q: What’s the difference between Hastelloy C276 and Inconel 625?
A: C276 bolts have an edge in corrosion resistance on Inconel 625 bolts. Typically Hastelloy bolts are the go-to in many harsh chemical environments and offer improved resistance most notably in hydrochloric acid. Hastelloy is also renowned for their resistance to sour gas environments.
In contrast Inconel 625 bolts have the edge in terms of high temperature resistance and strength. Inconel 625 can be used in temperatures up to 1800F, where as Hastelloy maxes out around 1500F. Inconel 625 also offers 144kis UTS, verses Hastelloys 107 ksi UTS.
Hastelloy is most often used where corrosion is the key factor such as oil & gas and chemical processing. In contrast, Inconel 625 is a key material for use in aerospace and other industries where high strength corrosion resistance is necessary.