The range of alloys utilized is magnificent: weathering steel for patina, marine-grade aluminum for weight cost savings
https://www.scribd.com/document/1039664098/Copper-Doesn-t-Lie-The-Case-for-Customized-Smokeshaft-Shrouds-and-a-100-Year-Roof-Strategy-208840
The series of alloys utilized is magnificent: weathering steel for patina, marine-grade aluminum for weight cost savings, and duplex stainless for rust resistance in harsh climates.