The range of alloys used is stunning: weathering steel for aging, marine-grade aluminum for weight savings

https://telegra.ph/Copper-Doesnt-Lie-The-Case-for-Custom-made-Chimney-Shrouds-and-a-100-Year-Roofing-Technique-05-16

The range of alloys used is sensational: weathering steel for aging, marine-grade light weight aluminum for weight cost savings, and duplex stainless for corrosion resistance in extreme climates.