Cor-Ten – The forgotten steel – Oakridge Bellows
The Right Material COR-TEN has alloying elements that improve its corrosion resistance up to 10 times that of mild steel – with a cost of only twice that of mild steel; $1/lb. vs. 50¢/lb. All carbon steels rust, but COR-TEN forms a tight surface layer of rust that does not easily flake off. It looks rusty, but the corrosion goes no further.