what is galvannealed

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GALV, A60, A-60, A40, A-40; steel types
The three most common steel types are cold rolled steel, galvannealed steel, and galvanized steel. Cold Rolled Steel (CRS) is suitable for most interior applications, is uncoated steel a...
A simple field test can determine if a door or frame is galvanized or cold rolled steel, however this test will not determine if the steel is A60, A40 or G90. The Tech Tip can be viewed here.
Yes, Steelcraft does offer optional A60 and A40 Galvannealed, and G90 Galvanized steel on doors and frames. Galvannealed A60 and A40: A60 coating designation - optional on all doors and frame...
Galvannealed and galvanized steel are zinc coated at the steel mills and are designed for rust and corrosion resistance. Both steels are passed through a hot dip coating process for rust prevention...
Galvannealed, A60, A-60, A40, A-40