Which material is commonly used for making chains in mechanical applications?

Chains used in mechanical applications are predominantly made from steel due to its strength, durability, and resistance to wear and corrosion. Steel has high tensile strength, which is crucial for chains that need to withstand heavy loads and significant stress during operation. Additionally, steel can be heat-treated to enhance its properties, allowing for the production of chains that can handle extreme conditions and provide reliable performance over time.

In contrast, the other materials listed are not suitable for chain manufacturing in mechanical applications. Plastic, while lightweight and resistant to some chemicals, lacks the strength and durability needed for heavy-duty uses. Rubber is flexible and offers good grip but is not suitable for load-bearing applications due to its tendency to deform under pressure. Wood, although strong in certain contexts, is not practical for chains because it is susceptible to environmental factors like moisture and rot, which would compromise its integrity in mechanical systems. Thus, steel emerges as the material of choice for making chains in various mechanical applications.