Q: What is the difference between Inconel and Hastelloy?
A: Inconel bolts and Hastelloy bolts have similarities as well as differences. Inconel is focused on high temperatures with different grades focusing on strength, corrosion resistance and high temp oxidation resistance. Hastelloy C276 bolts are most commonly used for the resistance to harsh and hot corrosive media.
The similarity lies in that Hastelloy C276 and Inconel 625 both offer similar corrosion resistance, with Hastelloy having a slight edge over Inconel 625 bolts (depending on the exact corrosive environment). Generally, Hastelloy bolts are ideal when there are more extreme/harsh corrosive needs, and Inconel 625 bolts when you need a combination of extreme strength, high temperature stability and corrosion resistance.