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.
Galvanized sheet metal g60 g90.
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 g60 is the most common galvanized metal and determines the amount of galvanize on the metal.
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.
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.
The g90 would be more galvanized coating than say g60.
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.
Hot dip galvanized steel.
Others available upon request.
First of all g90 is not a galvanizing specification.
It is a coating thickness designation in the galvanizing specification astm a653.
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.
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.
Galvannealed steel results from the dual process of galvanizing and annealing the steel.
Galvanized steel is the result of applying a protective zinc coating to steel to prevent it from rusting.
This makes it rust proof and easy to paint.