What material are liners typically made of?

Liners are often made from cast iron due to its excellent wear resistance, ability to withstand high temperatures, and good machining characteristics. Cast iron's durability and strength make it a suitable choice for applications where liners are subject to friction and abrasion, such as in engine cylinders or heavy machinery. The material can also distribute heat effectively and has a low coefficient of thermal expansion, which helps maintain dimensional stability under varying operating conditions.

While the other materials mentioned have their own advantages, cast iron's unique combination of properties, particularly its wear resistance and cost-effectiveness, tends to make it the preferred choice for liners in many engineering applications.