Inconel 625 Studs for Temperatures of 1650°F

Q: What stud and nut material should I use with a ANSI 600# Alloy 800 HT pipe class max temperature 1650°F.

A: Given that you are at a high temperature and pressure I would recommend going with an Inconel 625 stud. This will provide the best combination of high temperature strength. Inconel 625 bolting can be used to temperatures of about 1800°F. These fasteners also offer 144ksi ultimate tensile strength. Inconel 625 fasteners are known for their resistance to corrosive environments as well.

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