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Galvannealed Steel

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Cascadia Metals inventories a variety of Galvannealed Steel products. Galvannealed Steel (also known as satin coat) is created by two processes which, when combined, produce specialized sheets of steel. In the first process (galvanizing), the carbon steel is ran through a hot-dip galvanizing process where it emerges with a metallic coating of zinc on both sides of the strip. Immediately as the strip exits the zinc coating bath, the steel begins the second process (annealing) where the molten zinc coating is subjected to an in-line heat treatment that converts the entire coating to a zinc-iron alloy. In this final process, the iron diffuses from the steel into the coating giving it a very fine, greyish matte finish.


  • Paintability fine matte finish allows paint to adhere easily in post-paint applications
  • Joining more easily welded than other steels, can be readily joined
  • Corrosion Resistance very rust proof and less reactive to atmospheric exposure
  • Formability hard coating does not flake when formed, stamped or beaded

Our Galvannealed Steel meets

ASTM A653 requirements.

So you can rest assured our product will meet all standard specifications per ASTM.


Chemical Treatment

The chem-treat dry surface treatment consists of an application of a thin, invisible, corrosion inhibiting, inorganic, chemical film on the zinc surface. This film is applied at the galvanizing line by dipping into a solution of corrosion inhibiting chemicals. The chemically treated surface is much more resistant to white rust - the corrosion of zinc that typically occurs in humid conditions during storage or transportation.
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