Galvanized Sheet Metal G60 G90

Galvanized steel is the result of applying a protective zinc coating to steel to prevent it from rusting. Hot dip galvanized steel. First of all g90 is not a galvanizing specification.

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Galvanized sheet metal g60 g90.

G60 0 60 183 g90 0 90 275 g115 1 15 351 g140 1 40 427 g165 1 65 504 g185 1 85 565 g210 2 10 641. This specification is for hot dip galvanizing steel sheet using the continuous high speed galvanizing process. It is a coating thickness designation in the galvanizing specification astm a653. The g90 would be more galvanized coating than say g60.

If it is for outdoor use or in a high moisture environment i would always specify g90 just because it seems to make a difference over time. This makes it rust proof and easy to paint. The g60 is the most common galvanized metal and determines the amount of galvanize on the metal. I hope this helps.

Hot dip galvanizing is the process of coating iron or steel with a thin zinc layer by passing the steel through a molten bath of zinc at a temperature of around 860 f 460 c. When exposed to the atmosphere pure zinc reacts with oxygen to form zinc oxide which further reacts with carbon dioxide to form zinc carbonate a dull grey fairly strong material that stops further. The corrosion resistance of the g type is directly related to the amount of zinc coating i e g90 will resist corrosion to the base metal longer than g30. Galvannealed steel results from the dual process of galvanizing and annealing the steel.

G90 galvanized steel has a longer service life than g60 g40 and g30 galvanized steel because g90 galvanized steel has a heavier coating weight of zinc applied to it at 0 90 oz ft 2 as opposed to g60 galvanized steel at 060 ox ft 2 and so on. Others available upon request. The a coatings have a dull gray color with no spangle while the g coatings are bright shiny and can have various sized spangle visible.

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