How are Alloy 2117 rivets treated before being driven?

Alloy 2117 rivets are commonly used in aircraft structures due to their favorable properties, including good strength and corrosion resistance. The correct answer highlights that these rivets are heat treated by the manufacturer before being driven. This heat treatment process enhances their mechanical properties, making them suitable for applications that require high strength-to-weight ratios while maintaining ductility during installation.

The heat treatment process typically involves solution heat treatment followed by aging, which allows the alloy to develop its full strength characteristics. By the time they reach the end-user, these rivets are ready for use without requiring any additional heat treatment prior to installation. This ensures that they perform effectively when driven into the structures.

Understanding that alloy rivets like 2117 come pre-heat treated is essential, as it allows for proper assembly procedures to be followed without additional processing.