Which rivet is typically used as received without any further treatment?

The 2117-T3 rivet is commonly used without any further treatment because it is an aerospace alloy that is designed to be in a ready-to-use condition upon delivery. This alloy has good strength, excellent corrosion resistance, and is often used in applications where weight savings and durability are critical, making it ideal for sheet metal structures in aviation.

2117-T3 rivets achieve their strength from the heat treatment process, which means they do not require any additional processing or treatments before being installed, thus simplifying the assembly process. This feature is particularly valuable in time-sensitive manufacturing environments.

In contrast, the other materials mentioned typically require further treatments. For example, 2024-T3 is a high-strength alloy often used in aircraft structures but may need to be treated or processed before use due to its susceptibility to corrosion and its relatively lower toughness compared to 2117. Similarly, 6061-T6 and 5052-H32 are aluminum alloys that, while beneficial for various applications, are generally not used in the same manner as 2117-T3 rivets since they are not primarily intended for riveting applications without modification.

The selection of rivets for specific applications is highly dependent on their mechanical properties and treatment conditions, making the 2117