What's in Cor-Ten?

Would someone please tell me what materials and processing are used to
make the USS self-protective-rusting Cor-Ten steel?
Dan Shanefield
snipped-for-privacy@ieee.org
Reply to
shanefield
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It is a steel that contains copper. This improves the adherence of the rust to the surface. This provides some corrosion resistance. Applications need to be controled. Don't use it where it will get rubbed, such as a hand rail. Don't use it in a buried or partially buried application. To work well it needs to be able to drain and dry. The splash zone in marine use ought to be terrible for this material.
Reply to
bainite
Dan: Go to Rautaruukki Steel's web site at
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click on Products and Services, and on the left click on Brochures and Publications, and under Hot Rolled Strip and Plate products, click on Weathering Structural steels. This will download a big Acrobat file (1.86 Mb). See Table 4 for compositions (Cu-Cr-Ni).
Pittsburgh Pete
Reply to
metalengr
Be carefull if specifying weathering steels, they are excellent in the right application but some applications are not suitable.
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Reply to
David Deuchar
Brochures
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David: You are correct, design must be done carefully, and sea coasts are not suitable places for conventional weathering steels. (Recently the Japanese have made some 3% Ni seacost weathering steels though).
For older US experience on bridges, see the FHWA TECHNICAL ADVISORY : UNCOATED WEATHERING STEEL IN STRUCTURES T 5140.22, October 3, 1989
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Pittsburgh Pete
Reply to
metalengr

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