Q: Hello I am researching titanium and C276 hardware for a submerged application in a high chloride (20,000 mg/L) elevated temperature environment (125F). Corrosion resistance is more important than shear or tensile strength in this application.
A: Titanium screws should be a good choice for your application especially Grade 2 if the strength is not an issue. Hastelloy C276 fasteners may also be a good choice as well if your forming a lot of HCl. In terms of galling, whenever you have similar fasteners tightened on each other there is the possibility for galling. However there are a few great ways to minimize galling depending on your application needs (See the Blog Post: https://www.specialfastenersbolt.com/