What materials are commonly used to manufacture piston rings?

Piston rings are primarily made from high-grade cast iron and steel due to their exceptional durability and ability to withstand the high pressures and temperatures within an engine. Cast iron offers a good balance of wear resistance, strength, and cost-effectiveness; it can handle the friction and heat generated during operation. Steel, especially when treated or alloyed with other materials, provides even greater strength and wear characteristics, making it ideal for high-performance applications.

These materials also have the necessary thermal properties to cope with the extreme environments in which they operate, ensuring the rings maintain their shape and effectiveness over time. This selection of materials is critical for ensuring the longevity and reliability of the engine, as piston rings are essential for sealing the combustion chamber, controlling oil consumption, and maintaining engine efficiency.