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

Thanks to all you guys, for those answers (especially the first one). Dan Shanefield

Reply to
shanefield

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