Using Corten Steel in Planter Design & When Specifying …
The registered trademark for COR-TEN is held by US Steel, and the steel is also produced under licence by SSAB [Swedish Steel]. The so-called CR material [2.5mm and below] is rolled in Sweden, whilst the HR material [3mm to 30mm] is rolled in Finland – these are the specific materials which IOTA uses, where COR-TEN Steel is specified.