Hastelloy fasteners have modified content and are super alloys. These fasteners contain tungsten, nickel, molybdenum and chromium. The addition of tungsten gives hastelloy fasteners resistance towards corrosion in severe environments.
Pitting, and reducing conditions do not damage the internal structure of these fasteners. The nickel and molybdenum is added in high amounts to prevent crevice corrosion, as well. Chromium is added to these fasteners, which prevents oxidation. Carbide precipitation during welding does not occur in hastelloy, due to the low carbon content. Fasteners c