Define "ductile materials" in the context of pressure piping.

Ductile materials are characterized by their ability to undergo significant plastic deformation before experiencing failure. This means they can stretch, bend, or otherwise change shape under stress without breaking, making them particularly valuable in pressure piping systems where flexibility and resilience are required. For example, in scenarios involving sudden increases in pressure or changes in temperature, ductile materials can absorb stress and deform instead of fracturing, ensuring the integrity of the piping system.

This property is especially important in environments where dynamic loads or thermal expansion and contraction occur, as it allows the material to accommodate these changes without catastrophic failure. By being ductile, these materials help prevent leaks and maintain the reliability of the pressure piping system under various operational conditions.