What are the pros and cons of Stainless Steel vs. Aluminum trunking?

Stainless Steel (SS316):

Pros: Exceptional corrosion resistance, ideal for food processing or offshore sites.

Cons: Higher initial cost and heavier weight.

Aluminum:

Pros: Naturally corrosion-resistant, lightweight, and easy to cut/install.

Cons: Lower structural strength compared to steel and higher thermal expansion rate.