Like the rustic look of Cor-ten steel? Here are some other options that achieve a similar look.

[Dover]

I recently saw photos of a monastery's new medical facility built in the Big Sur area (above) which utilized cor-ten steel to give it a natural rusty orange/red color. Though it is metal, it looks surprisingly appropriate in a rustic setting. But cor-ten has some properties that would make it a bad choice in any but a dry environment, according to some sources I've read. However, it has become so popular and desirable to builders that U.S. Steel has come up with a substitute that is a thin-gauge, coated galvanized metal called Cor-ten AZP. And it can apparently be used for both roofing and siding. I wonder about the longevity of the coating and think it's too uniform in color to really pull off the cor-ten metal look completely. But it comes close and does offer a rustic look.



Here's the info:


Cleveland, OH - Architects, building designers and structural engineers love to incorporate the rich, organic look of weathering steels, such as COR-TEN® Steel, in their work. As demand for these steels grew, United States Steel Corporation (“U. S. Steel”) faced a challenge and a coil coating technique supplied the solution.

cont'd
http://www.designandbuildwithmetal.com/IndustryNews/Archives/2007/10_October/cor_ten_azp.aspx



Another brand:
http://www.paintedrustedroofing.com/?gclid=COisoIHF_KMCFeQD5Qod22m1LA


There are even Cor-ten look-alike tiles for interiors as well as exteriors. These two are by a company called TAU.




Taufine
Tau Ceramica
tauceramic.com
Large-format porcelain tile • Minimum 1/5" thick - 50% thinner than other Tau tiles - Available in two formats: 11-4/5" by 23-3/5" and 17-7/10" by 35-2/5" - Suitable for exteriors and façades - Available in the Corten, Corten Energy, Portland, and Mythos collections.




Does anyone know of any other good options to substitute for cor-ten to get that rusty metal look?