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

https://www.scribd.com/document/1042186110/Snow-Guard-Truths-Copper-s-Unequaled-Longevity-in-Alpine-and-Coastal-Projects-173583

The variety of alloys utilized is magnificent: weathering steel for patina, marine-grade aluminum for weight cost savings, and duplex stainless for deterioration resistance in rough climates.