Galvanized Sheet Metal G60 G90
Galvanized steel is the result of applying a protective zinc coating to steel to prevent it from rusting.
Galvanized sheet metal g60 g90. 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. 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. Galvannealed steel results from the dual process of galvanizing and annealing the steel. I hope this helps.
The g90 would be more galvanized coating than say g60. 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. Others available upon request. 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 a coatings have a dull gray color with no spangle while the g coatings are bright shiny and can have various sized spangle visible. Hot dip galvanized steel. This makes it rust proof and easy to paint.
Deep drawing steel and extra deep drawing steel are designations described in the astm specifications for steel sheet zinc coated galvanized or zinc iron alloy coated galvannealed by. The g60 is the most common galvanized metal and determines the amount of galvanize on the metal. 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.