What primarily helps determine the strength and resistance to corrosion of an aircraft bolt?

The strength and resistance to corrosion of an aircraft bolt are heavily influenced by the type of metal used in its manufacture. Different metals possess varying mechanical properties and resistance to environmental factors, such as moisture and salt, which can lead to corrosion. For instance, stainless steel is known for its excellent corrosion resistance, while high-strength steel may offer greater tensile strength but could be more prone to corrosion unless properly treated or plated.

Additionally, different alloys can be engineered to enhance specific characteristics like tensile strength, ductility, or fatigue resistance, making the choice of metal fundamental in determining how the bolt will perform under stress and in corrosive environments. Thus, when assessing bolts for use in aircraft, selecting the appropriate type of metal is crucial for ensuring both strength and durability over time.