What is the best material for an electric contact finger subject to constant bending?

Phosphor bronze is the best material for an electric contact finger that is subject to constant bending due to its unique combination of properties that favor durability and conductivity. This material has excellent fatigue resistance and tensile strength, making it particularly suitable for applications where it will repeatedly flex or bend.

Phosphor bronze maintains good electrical conductivity while also resisting wear and corrosion, ensuring that the contact surface remains effective over time. Its ability to return to its original shape after bending makes it ideal for components that experience pressure, movement, or vibration, like electric contact fingers. In contrast, other materials, while they may offer certain advantages, do not possess the same level of resilience and performance under repetitive stress.