Tag: Inconel 600 screws for high temperature

An Inconel 600 Bolt vs an Inconel 625 Bolt

Q: Does Inconel 600 provide the same level of corrosion resistance as an Inconel 625 bolt?
A: Not typically. For corrosion resistance, an Inconel 625 bolt is one of the more corrosion resistant versions of the Inconel alloys and it can withstand many strong hot acids. While not as corrosion resistant as a Hastelloy C276 bolt, Inconel 625 bolts have more high temperature capabilities. As for Inconel 600 compared to Inconel 625 screws, 600 is the go to for high temperature nickel alloys and can withstand up to 2000F vs 1800F for Inconel 625.

Inconel Fasteners for 1800F and Corrosion

I have a customer looking for some studs for a flange that they say could reach 1800deg F. What would you use for that?

At 1800F you have a couple of options. In a steel variety you have alloy 330 studs. This will be oxidation resistant and stable at the 1800F temperature. Also, you should consider Inconel 600 fasteners. This will be a more robust solution providing additional corrosion resistance and strength. The cost difference is usually minimal which makes Inconel 600 fasteners a good choice.