The series of alloys utilized is sensational: weathering steel for patina, marine-grade aluminum for weight cost savings
https://www.livebinders.com/b/3716998?tabid=225e1f6b-c9a6-2b4b-dd2b-9ba831e3dcf9
The variety of alloys utilized is sensational: weathering steel for aging, marine-grade aluminum for weight financial savings, and duplex stainless for corrosion resistance in rough environments.